Change internals of Codegen to use boxed types by default

Fix #379
Add a validator step, fix invalid attributes

.gitea/workflows/build_and_test.yml

@@ -1,5 +1,8 @@
 name: Build and Test with Maven
-on: [push]
+on:
+  push:
+    branches-ignore:
+      - master
 
 jobs:
   Build-and-test-with-Maven:

.gitea/workflows/sonarqube.yml

@@ -0,0 +1,45 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+      types: [opened, synchronize, reopened]
+
+name: SonarQube Scan
+jobs:
+  sonarqube:
+    name: SonarQube Trigger
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checking out
+      uses: actions/checkout@v4
+      with:
+        # Disabling shallow clone is recommended for improving relevancy of reporting
+        fetch-depth: 0
+    - name: Install maven
+      run: |
+        apt update
+        apt install -y maven
+    - name: Install java
+      uses: actions/setup-java@v4
+      with:
+        distribution: 'temurin'
+        java-version: '24'
+        cache: 'maven'
+    - name: Compile project
+      run: |
+        mvn clean dependency:copy-dependencies verify
+    - name: SonarQube Scan
+      uses: SonarSource/sonarqube-scan-action@v5.3.0
+      env:
+        SONAR_HOST_URL: ${{ secrets.SONARQUBE_HOST }}
+        SONAR_TOKEN: ${{ secrets.SONARQUBE_TOKEN }}
+      with:
+        args: >
+          -Dsonar.projectKey=Java-TX
+          -Dsonar.sources=src/main/java
+          -Dsonar.tests=src/test/java
+          -Dsonar.junit.reportPaths=target/test-reports
+          -Dsonar.java.binaries=target/classes
+          -Dsonar.java.libraries=target/dependency/*.jar
+          -Dsonar.coverage.jacoco.xmlReportPaths=target/site/jacoco/jacoco.xml

README.md

@@ -0,0 +1,7 @@
+## Java-TX Compiler
+
+[![Lines of Code](https://gitea.hb.dhbw-stuttgart.de/sonarqube/api/project_badges/measure?project=Java-TX&metric=ncloc&token=sqb_d4a372fca7a6b86441243728a6ea5f88183db5eb)](https://gitea.hb.dhbw-stuttgart.de/sonarqube/dashboard?id=Java-TX)
+[![Coverage](https://gitea.hb.dhbw-stuttgart.de/sonarqube/api/project_badges/measure?project=Java-TX&metric=coverage&token=sqb_d4a372fca7a6b86441243728a6ea5f88183db5eb)](https://gitea.hb.dhbw-stuttgart.de/sonarqube/dashboard?id=Java-TX)
+[![Quality Gate Status](https://gitea.hb.dhbw-stuttgart.de/sonarqube/api/project_badges/measure?project=Java-TX&metric=alert_status&token=sqb_d4a372fca7a6b86441243728a6ea5f88183db5eb)](https://gitea.hb.dhbw-stuttgart.de/sonarqube/dashboard?id=Java-TX)
+
+Work in Progress Java-TX Compiler repository!

pom.xml

@@ -44,10 +44,34 @@ http://maven.apache.org/maven-v4_0_0.xsd">
 			<artifactId>asm</artifactId>
 			<version>9.8</version>
 		</dependency>
+		<dependency>
+			<groupId>org.ow2.asm</groupId>
+			<artifactId>asm-util</artifactId>
+			<version>9.8</version>
+		</dependency>
 	</dependencies>
 
 	<build>
 		<plugins>
+			<plugin>
+				<groupId>org.jacoco</groupId>
+				<artifactId>jacoco-maven-plugin</artifactId>
+				<version>0.8.13</version>
+				<executions>
+					<execution>
+						<goals>
+							<goal>prepare-agent</goal>
+						</goals>
+					</execution>
+					<execution>
+						<id>report</id>
+						<phase>prepare-package</phase>
+						<goals>
+							<goal>report</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
@@ -65,7 +89,7 @@ http://maven.apache.org/maven-v4_0_0.xsd">
 				<configuration>
 					<redirectTestOutputToFile>true</redirectTestOutputToFile>
 					<reportsDirectory>${project.build.directory}/test-reports</reportsDirectory>
-					<argLine>--enable-preview</argLine>
+					<argLine>${argLine} --enable-preview</argLine>
 					<trimStackTrace>false</trimStackTrace>
 					<excludes>
 						<exclude>**/JavaTXCompilerTest.java</exclude>

resources/bytecode/javFiles/Bug325.jav

@@ -6,7 +6,7 @@ import java.util.stream.Stream;
 
 public class Bug325 {
     public main() {
-      List<Integer> list = new ArrayList<>(List.of(1,2,3,4,5));
+      var list = new ArrayList<>(List.of(1,2,3,4,5));
       var func = x -> x*2;
       return list.stream().map(func).toList();
    }

resources/bytecode/javFiles/Bug373.jav

@@ -0,0 +1,17 @@
+import java.lang.Boolean;
+import java.lang.Integer;
+import java.lang.System;
+import java.io.PrintStream;
+import java.lang.Character;
+
+public class Bug373 {
+    public static main() {
+        System.out.println(true);
+        System.out.println(false);
+        System.out.println(1);
+        System.out.println(1l);
+        System.out.println(1.0);
+        System.out.println(1.0f);
+        System.out.println('a');
+    }
+}

resources/bytecode/javFiles/Bug378Id.jav

@@ -0,0 +1,3 @@
+class Bug378Id {
+    id2 = x -> x;
+}

resources/bytecode/javFiles/Bug378Main.jav

@@ -0,0 +1,8 @@
+import Bug378Id;
+import java.lang.Integer;
+
+class Bug378Main {
+    static main(args) {
+        var hallo = (new Bug378Id<Integer>().id2).apply(1);
+    }
+}

resources/bytecode/javFiles/Bug379.jav

@@ -0,0 +1,24 @@
+import java.lang.Integer;
+import java.lang.Double;
+import java.lang.System;
+import java.io.PrintStream;
+
+public class Bug379 {
+    public Fun1$$<Double, Double> fact = (x) -> {
+        if (x == 1) {
+            return 1;
+        } else {
+            return x * (fact.apply(x-1));
+        }
+    };
+
+    public getFact(x) {
+        return fact.apply(x);
+    }
+
+    public static void main(x) {
+		var f = new Bug379();
+        var intRes = f.getFact(3);
+		System.out.println(intRes);
+	}
+}

resources/bytecode/javFiles/Main.jav

@@ -0,0 +1,14 @@
+import java.lang.Object;
+import java.lang.System;
+import java.lang.Iterable;
+import java.io.PrintStream;
+import java.util.List;
+import java.lang.String;
+
+class Main {
+    static main(args) {
+        for (var arg : args) {
+            System.out.println(arg);
+        }
+    }
+}

src/main/java/de/dhbwstuttgart/bytecode/Codegen.java

@@ -9,7 +9,9 @@ import de.dhbwstuttgart.target.tree.*;
 import de.dhbwstuttgart.target.tree.expression.*;
 import de.dhbwstuttgart.target.tree.type.*;
 import org.objectweb.asm.*;
+import org.objectweb.asm.util.CheckClassAdapter;
 
+import java.io.PrintWriter;
 import java.lang.invoke.*;
 import java.lang.reflect.Modifier;
 import java.util.*;
@@ -125,34 +127,36 @@ public class Codegen {
     }
 
     private void popValue(State state, TargetType type) {
-        if (type.equals(TargetType.Double) || type.equals(TargetType.Long))
+        if (type.equals(TargetType.double_) || type.equals(TargetType.long_))
             state.mv.visitInsn(POP2);
         else
             state.mv.visitInsn(POP);
     }
 
     private void boxPrimitive(State state, TargetType type) {
+        if (type instanceof TargetExtendsWildcard ew) type = ew.innerType();
         var mv = state.mv;
-        if (type.equals(TargetType.Boolean) || type.equals(TargetType.boolean_)) {
+        if (type.equals(TargetType.boolean_)) {
             mv.visitMethodInsn(INVOKESTATIC, "java/lang/Boolean", "valueOf", "(Z)Ljava/lang/Boolean;", false);
-        } else if (type.equals(TargetType.Byte) || type.equals(TargetType.byte_)) {
+        } else if (type.equals(TargetType.byte_)) {
             mv.visitMethodInsn(INVOKESTATIC, "java/lang/Byte", "valueOf", "(B)Ljava/lang/Byte;", false);
-        } else if (type.equals(TargetType.Double) || type.equals(TargetType.double_)) {
+        } else if (type.equals(TargetType.double_)) {
             mv.visitMethodInsn(INVOKESTATIC, "java/lang/Double", "valueOf", "(D)Ljava/lang/Double;", false);
-        } else if (type.equals(TargetType.Long) || type.equals(TargetType.long_)) {
+        } else if (type.equals(TargetType.long_)) {
             mv.visitMethodInsn(INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;", false);
-        } else if (type.equals(TargetType.Integer) || type.equals(TargetType.int_)) {
+        } else if (type.equals(TargetType.int_)) {
             mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;", false);
-        } else if (type.equals(TargetType.Float) || type.equals(TargetType.float_)) {
+        } else if (type.equals(TargetType.float_)) {
             mv.visitMethodInsn(INVOKESTATIC, "java/lang/Float", "valueOf", "(F)Ljava/lang/Float;", false);
-        } else if (type.equals(TargetType.Short) || type.equals(TargetType.short_)) {
+        } else if (type.equals(TargetType.short_)) {
             mv.visitMethodInsn(INVOKESTATIC, "java/lang/Short", "valueOf", "(S)Ljava/lang/Short;", false);
-        } else if (type.equals(TargetType.Char) || type.equals(TargetType.char_)) {
+        } else if (type.equals(TargetType.char_)) {
             mv.visitMethodInsn(INVOKESTATIC, "java/lang/Character", "valueOf", "(C)Ljava/lang/Character;", false);
         }
     }
 
     private void unboxPrimitive(State state, TargetType type) {
+        if (type instanceof TargetExtendsWildcard ew) type = ew.innerType();
         var mv = state.mv;
         if (type.equals(TargetType.Boolean)) {
             mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Boolean", "booleanValue", "()Z", false);
@@ -183,9 +187,11 @@ public class Codegen {
         convertTo(state, op.right().type(), type);
         mv.visitJumpInsn(code, if_true);
         mv.visitInsn(ICONST_0);
+        boxPrimitive(state, TargetType.toPrimitive(op.type()));
         mv.visitJumpInsn(GOTO, end);
         mv.visitLabel(if_true);
         mv.visitInsn(ICONST_1);
+        boxPrimitive(state, TargetType.toPrimitive(op.type()));
         mv.visitLabel(end);
     }
 
@@ -200,9 +206,11 @@ public class Codegen {
         mv.visitInsn(cmp);
         mv.visitJumpInsn(code, if_true);
         mv.visitInsn(ICONST_0);
+        boxPrimitive(state, TargetType.toPrimitive(op.type()));
         mv.visitJumpInsn(GOTO, end);
         mv.visitLabel(if_true);
         mv.visitInsn(ICONST_1);
+        boxPrimitive(state, TargetType.toPrimitive(op.type()));
         mv.visitLabel(end);
     }
 
@@ -228,62 +236,85 @@ public class Codegen {
     }
 
     private void convertTo(State state, TargetType source, TargetType dest) {
-        var mv = state.mv;
+        if (source instanceof TargetExtendsWildcard ew) source = ew.innerType();
+        if (dest instanceof TargetExtendsWildcard ew) dest = ew.innerType();
+
         if (source.equals(dest))
             return;
-        if (source.equals(TargetType.Long)) {
+
-            if (dest.equals(TargetType.Integer)) {
+        var mv = state.mv;
+        if ((source instanceof TargetRefType || source instanceof TargetGenericType) &&
+                (dest instanceof TargetRefType || dest instanceof TargetGenericType)) {
+            if (dest instanceof TargetGenericType) return;
+            mv.visitTypeInsn(CHECKCAST, dest.getInternalName());
+            return;
+        }
+
+        if (!(source instanceof TargetPrimitiveType)) {
+            unboxPrimitive(state, source);
+            source = TargetType.toPrimitive(source);
+        }
+
+        var origDest = dest;
+        dest = TargetType.toPrimitive(dest);
+        if (source.equals(TargetType.long_)) {
+            if (dest.equals(TargetType.int_))
                 mv.visitInsn(L2I);
-            } else if (dest.equals(TargetType.Float))
+            else if (dest.equals(TargetType.float_))
                 mv.visitInsn(L2F);
-            else if (dest.equals(TargetType.Double))
+            else if (dest.equals(TargetType.double_))
                 mv.visitInsn(L2D);
-            else if (dest.equals(TargetType.Byte) || dest.equals(TargetType.Char) || dest.equals(TargetType.Short)) {
+            else if (dest.equals(TargetType.byte_) || dest.equals(TargetType.char_) || dest.equals(TargetType.short_)) {
                 mv.visitInsn(L2I);
-                convertTo(state, TargetType.Integer, dest);
+                convertTo(state, TargetType.int_, dest);
             }
-        } else if (source.equals(TargetType.Float)) {
+        } else if (source.equals(TargetType.float_)) {
-            if (dest.equals(TargetType.Integer))
+            if (dest.equals(TargetType.int_))
                 mv.visitInsn(F2I);
-            else if (dest.equals(TargetType.Double))
+            else if (dest.equals(TargetType.double_))
                 mv.visitInsn(F2D);
-            else if (dest.equals(TargetType.Long))
+            else if (dest.equals(TargetType.long_))
                 mv.visitInsn(F2L);
-            else if (dest.equals(TargetType.Byte) || dest.equals(TargetType.Char) || dest.equals(TargetType.Short)) {
+            else if (dest.equals(TargetType.byte_) || dest.equals(TargetType.char_) || dest.equals(TargetType.short_)) {
                 mv.visitInsn(F2I);
-                convertTo(state, TargetType.Integer, dest);
+                convertTo(state, TargetType.int_, dest);
             }
-        } else if (source.equals(TargetType.Double)) {
+        } else if (source.equals(TargetType.double_)) {
-            if (dest.equals(TargetType.Integer))
+            if (dest.equals(TargetType.int_))
                 mv.visitInsn(D2I);
-            else if (dest.equals(TargetType.Float))
+            else if (dest.equals(TargetType.float_))
                 mv.visitInsn(D2F);
-            else if (dest.equals(TargetType.Long))
+            else if (dest.equals(TargetType.long_))
                 mv.visitInsn(D2L);
-            else if (dest.equals(TargetType.Byte) || dest.equals(TargetType.Char) || dest.equals(TargetType.Short)) {
+            else if (dest.equals(TargetType.byte_) || dest.equals(TargetType.char_) || dest.equals(TargetType.short_)) {
                 mv.visitInsn(D2I);
-                convertTo(state, TargetType.Integer, dest);
+                convertTo(state, TargetType.int_, dest);
             }
-        } else if (source.equals(TargetType.Byte) || source.equals(TargetType.Char) || source.equals(TargetType.Short) || source.equals(TargetType.Integer)) {
+        } else if (source.equals(TargetType.byte_) || source.equals(TargetType.char_) || source.equals(TargetType.short_) || source.equals(TargetType.int_)) {
-            if (dest.equals(TargetType.Byte))
+            if (dest.equals(TargetType.byte_))
                 mv.visitInsn(I2B);
-            else if (dest.equals(TargetType.Char))
+            else if (dest.equals(TargetType.char_))
                 mv.visitInsn(I2C);
-            else if (dest.equals(TargetType.Short))
+            else if (dest.equals(TargetType.short_))
                 mv.visitInsn(I2S);
-            else if (dest.equals(TargetType.Long))
+            else if (dest.equals(TargetType.long_))
                 mv.visitInsn(I2L);
-            else if (dest.equals(TargetType.Float))
+            else if (dest.equals(TargetType.float_))
                 mv.visitInsn(I2F);
-            else if (dest.equals(TargetType.Double))
+            else if (dest.equals(TargetType.double_))
                 mv.visitInsn(I2D);
+        } else if (source.equals(TargetType.boolean_)) {
+            unboxPrimitive(state, dest);
         } else if (isFunctionalInterface(source) && isFunctionalInterface(dest) &&
                 !(source instanceof TargetFunNType && dest instanceof TargetFunNType)) {
             boxFunctionalInterface(state, source, dest);
-        } else if (!(dest instanceof TargetGenericType)) {
+            return;
-            //boxPrimitive(state, source);
+        }
-            mv.visitTypeInsn(CHECKCAST, dest.getInternalName());
+
-            unboxPrimitive(state, dest);
+        if (!(origDest instanceof TargetPrimitiveType)) {
+            if (dest instanceof TargetPrimitiveType)
+                boxPrimitive(state, dest);
+            else boxPrimitive(state, source);
         }
     }
 
@@ -343,9 +374,9 @@ public class Codegen {
                 mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V", false);
             } else {
                 generate(state, add.left());
-                convertTo(state, add.left().type(), add.type());
+                convertTo(state, add.left().type(), TargetType.toPrimitive(add.type()));
                 generate(state, add.right());
-                convertTo(state, add.right().type(), add.type());
+                convertTo(state, add.right().type(), TargetType.toPrimitive(add.type()));
                 var type = add.type();
                 if (type.equals(TargetType.Byte) || type.equals(TargetType.Char) || type.equals(TargetType.Integer) || type.equals(TargetType.Short)) {
                     mv.visitInsn(IADD);
@@ -358,6 +389,7 @@ public class Codegen {
                 } else {
                     throw new CodeGenException("Invalid argument to Add expression, type: " + add.type());
                 }
+                boxPrimitive(state, TargetType.toPrimitive(op.type()));
             }
             if (add.type().equals(TargetType.String)) {
                 generate(state, add.right());
@@ -369,9 +401,9 @@ public class Codegen {
         }
         case Sub sub: {
             generate(state, sub.left());
-            convertTo(state, sub.left().type(), op.type());
+            convertTo(state, sub.left().type(), TargetType.toPrimitive(op.type()));
             generate(state, sub.right());
-            convertTo(state, sub.right().type(), op.type());
+            convertTo(state, sub.right().type(), TargetType.toPrimitive(op.type()));
             var type = sub.type();
             if (type.equals(TargetType.Byte) || type.equals(TargetType.Char) || type.equals(TargetType.Integer) || type.equals(TargetType.Short)) {
                 mv.visitInsn(ISUB);
@@ -384,13 +416,14 @@ public class Codegen {
             } else {
                 throw new CodeGenException("Invalid argument to Sub expression");
             }
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             break;
         }
         case Div div: {
             generate(state, div.left());
-            convertTo(state, div.left().type(), op.type());
+            convertTo(state, div.left().type(), TargetType.toPrimitive(op.type()));
             generate(state, div.right());
-            convertTo(state, div.right().type(), op.type());
+            convertTo(state, div.right().type(), TargetType.toPrimitive(op.type()));
             var type = div.type();
             if (type.equals(TargetType.Byte) || type.equals(TargetType.Char) || type.equals(TargetType.Integer) || type.equals(TargetType.Short)) {
                 mv.visitInsn(IDIV);
@@ -403,13 +436,14 @@ public class Codegen {
             } else {
                 throw new CodeGenException("Invalid argument to Div expression");
             }
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             break;
         }
         case Mul mul: {
             generate(state, mul.left());
-            convertTo(state, mul.left().type(), op.type());
+            convertTo(state, mul.left().type(), TargetType.toPrimitive(op.type()));
             generate(state, mul.right());
-            convertTo(state, mul.right().type(), op.type());
+            convertTo(state, mul.right().type(), TargetType.toPrimitive(op.type()));
             var type = mul.type();
             if (type.equals(TargetType.Byte) || type.equals(TargetType.Char) || type.equals(TargetType.Integer) || type.equals(TargetType.Short)) {
                 mv.visitInsn(IMUL);
@@ -422,13 +456,14 @@ public class Codegen {
             } else {
                 throw new CodeGenException("Invalid argument to Mul expression");
             }
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             break;
         }
         case Rem rem: {
             generate(state, rem.left());
-            convertTo(state, rem.left().type(), op.type());
+            convertTo(state, rem.left().type(), TargetType.toPrimitive(op.type()));
             generate(state, rem.right());
-            convertTo(state, rem.right().type(), op.type());
+            convertTo(state, rem.right().type(), TargetType.toPrimitive(op.type()));
             var type = rem.type();
             if (type.equals(TargetType.Byte) || type.equals(TargetType.Char) || type.equals(TargetType.Integer) || type.equals(TargetType.Short)) {
                 mv.visitInsn(IREM);
@@ -441,6 +476,7 @@ public class Codegen {
             } else {
                 throw new CodeGenException("Invalid argument to Rem expression");
             }
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             break;
         }
         case Or or: {
@@ -448,14 +484,18 @@ public class Codegen {
             Label or_true = new Label();
             Label end = new Label();
             generate(state, or.left());
+            convertTo(state, or.left().type(), TargetType.toPrimitive(op.type()));
             mv.visitJumpInsn(IFNE, or_true);
             generate(state, or.right());
+            convertTo(state, or.right().type(), TargetType.toPrimitive(op.type()));
             mv.visitJumpInsn(IFEQ, or_false);
             mv.visitLabel(or_true);
             mv.visitInsn(ICONST_1);
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             mv.visitJumpInsn(GOTO, end);
             mv.visitLabel(or_false);
             mv.visitInsn(ICONST_0);
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             mv.visitLabel(end);
             break;
         }
@@ -463,47 +503,54 @@ public class Codegen {
             Label and_false = new Label();
             Label end = new Label();
             generate(state, and.left());
+            convertTo(state, and.left().type(), TargetType.toPrimitive(op.type()));
             mv.visitJumpInsn(IFEQ, and_false);
             generate(state, and.right());
+            convertTo(state, and.right().type(), TargetType.toPrimitive(op.type()));
             mv.visitJumpInsn(IFEQ, and_false);
             mv.visitInsn(ICONST_1);
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             mv.visitJumpInsn(GOTO, end);
             mv.visitLabel(and_false);
             mv.visitInsn(ICONST_0);
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             mv.visitLabel(end);
             break;
         }
         case BAnd band: {
             generate(state, band.left());
-            convertTo(state, band.left().type(), op.type());
+            convertTo(state, band.left().type(), TargetType.toPrimitive(op.type()));
             generate(state, band.right());
-            convertTo(state, band.right().type(), op.type());
+            convertTo(state, band.right().type(), TargetType.toPrimitive(op.type()));
             if (band.type().equals(TargetType.Long))
                 mv.visitInsn(LAND);
             else
                 mv.visitInsn(IAND);
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             break;
         }
         case BOr bor: {
             generate(state, bor.left());
-            convertTo(state, bor.left().type(), op.type());
+            convertTo(state, bor.left().type(), TargetType.toPrimitive(op.type()));
             generate(state, bor.right());
-            convertTo(state, bor.right().type(), op.type());
+            convertTo(state, bor.right().type(), TargetType.toPrimitive(op.type()));
             if (bor.type().equals(TargetType.Long))
                 mv.visitInsn(LOR);
             else
                 mv.visitInsn(IOR);
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             break;
         }
         case XOr xor: {
             generate(state, xor.left());
-            convertTo(state, xor.left().type(), op.type());
+            convertTo(state, xor.left().type(), TargetType.toPrimitive(op.type()));
             generate(state, xor.right());
-            convertTo(state, xor.right().type(), op.type());
+            convertTo(state, xor.right().type(), TargetType.toPrimitive(op.type()));
             if (xor.type().equals(TargetType.Long))
                 mv.visitInsn(LXOR);
             else
                 mv.visitInsn(IXOR);
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             break;
         }
         case Instof instof: {
@@ -512,44 +559,47 @@ public class Codegen {
         }
         case Shl shl: {
             generate(state, shl.left());
-            convertTo(state, shl.left().type(), op.type());
+            convertTo(state, shl.left().type(),  TargetType.toPrimitive(op.type()));
             generate(state, shl.right());
-            convertTo(state, shl.right().type(), op.type());
+            convertTo(state, shl.right().type(), TargetType.toPrimitive(op.type()));
             if (shl.type().equals(TargetType.Long))
                 mv.visitInsn(LSHL);
             else
                 mv.visitInsn(ISHL);
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             break;
         }
         case Shr shr: {
             generate(state, shr.left());
-            convertTo(state, shr.left().type(), op.type());
+            convertTo(state, shr.left().type(), TargetType.toPrimitive(op.type()));
             generate(state, shr.right());
-            convertTo(state, shr.right().type(), op.type());
+            convertTo(state, shr.right().type(), TargetType.toPrimitive(op.type()));
             if (shr.type().equals(TargetType.Long))
                 mv.visitInsn(LSHR);
             else
                 mv.visitInsn(ISHR);
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             break;
         }
         case UShr ushr: {
             generate(state, ushr.left());
-            convertTo(state, ushr.left().type(), op.type());
+            convertTo(state, ushr.left().type(), TargetType.toPrimitive(op.type()));
             generate(state, ushr.right());
-            convertTo(state, ushr.right().type(), op.type());
+            convertTo(state, ushr.right().type(), TargetType.toPrimitive(op.type()));
             if (ushr.type().equals(TargetType.Long))
                 mv.visitInsn(LUSHR);
             else
                 mv.visitInsn(IUSHR);
+            boxPrimitive(state, TargetType.toPrimitive(op.type()));
             break;
         }
         case Greater greater: {
-            var type = largerType(greater.left().type(), greater.right().type());
+            var type = TargetType.toPrimitive(largerType(greater.left().type(), greater.right().type()));
-            if (type.equals(TargetType.Long)) {
+            if (type.equals(TargetType.long_)) {
                 generateRelationalOperator(state, greater, type, LCMP, IFGT);
-            } else if (type.equals(TargetType.Float)) {
+            } else if (type.equals(TargetType.float_)) {
                 generateRelationalOperator(state, greater, type, FCMPL, IFGT);
-            } else if (type.equals(TargetType.Double)) {
+            } else if (type.equals(TargetType.double_)) {
                 generateRelationalOperator(state, greater, type, DCMPL, IFGT);
             } else {
                 generateRelationalOperator(state, greater, type, IF_ICMPGT);
@@ -557,12 +607,12 @@ public class Codegen {
             break;
         }
         case Less less: {
-            var type = largerType(less.left().type(), less.right().type());
+            var type = TargetType.toPrimitive(largerType(less.left().type(), less.right().type()));
-            if (type.equals(TargetType.Long)) {
+            if (type.equals(TargetType.long_)) {
                 generateRelationalOperator(state, less, type, LCMP, IFLT);
-            } else if (type.equals(TargetType.Float)) {
+            } else if (type.equals(TargetType.float_)) {
                 generateRelationalOperator(state, less, type, FCMPL, IFLT);
-            } else if (type.equals(TargetType.Double)) {
+            } else if (type.equals(TargetType.double_)) {
                 generateRelationalOperator(state, less, type, DCMPL, IFLT);
             } else {
                 generateRelationalOperator(state, less, type, IF_ICMPLT);
@@ -570,12 +620,12 @@ public class Codegen {
             break;
         }
         case GreaterOrEqual greaterOrEqual: {
-            var type = largerType(greaterOrEqual.left().type(), greaterOrEqual.right().type());
+            var type = TargetType.toPrimitive(largerType(greaterOrEqual.left().type(), greaterOrEqual.right().type()));
-            if (type.equals(TargetType.Long)) {
+            if (type.equals(TargetType.long_)) {
                 generateRelationalOperator(state, greaterOrEqual, type, LCMP, IFGE);
-            } else if (type.equals(TargetType.Float)) {
+            } else if (type.equals(TargetType.float_)) {
                 generateRelationalOperator(state, greaterOrEqual, type, FCMPL, IFGE);
-            } else if (type.equals(TargetType.Double)) {
+            } else if (type.equals(TargetType.double_)) {
                 generateRelationalOperator(state, greaterOrEqual, type, DCMPL, IFGE);
             } else {
                 generateRelationalOperator(state, greaterOrEqual, type, IF_ICMPGE);
@@ -583,12 +633,12 @@ public class Codegen {
             break;
         }
         case LessOrEqual lessOrEqual: {
-            var type = largerType(lessOrEqual.left().type(), lessOrEqual.right().type());
+            var type = TargetType.toPrimitive(largerType(lessOrEqual.left().type(), lessOrEqual.right().type()));
-            if (type.equals(TargetType.Long)) {
+            if (type.equals(TargetType.long_)) {
                 generateRelationalOperator(state, lessOrEqual, type, LCMP, IFLE);
-            } else if (type.equals(TargetType.Float)) {
+            } else if (type.equals(TargetType.float_)) {
                 generateRelationalOperator(state, lessOrEqual, type, FCMPL, IFLE);
-            } else if (type.equals(TargetType.Double)) {
+            } else if (type.equals(TargetType.double_)) {
                 generateRelationalOperator(state, lessOrEqual, type, DCMPL, IFLE);
             } else {
                 generateRelationalOperator(state, lessOrEqual, type, IF_ICMPLE);
@@ -596,30 +646,30 @@ public class Codegen {
             break;
         }
         case Equal equal: {
-            var type = largerType(equal.left().type(), equal.right().type());
+            var type = TargetType.toPrimitive(largerType(equal.left().type(), equal.right().type()));
-            if (type.equals(TargetType.Long)) {
+            if (type.equals(TargetType.long_)) {
-                generateRelationalOperator(state, equal, type, LCMP, IFEQ);
+                generateRelationalOperator(state, equal, TargetType.long_, LCMP, IFEQ);
-            } else if (type.equals(TargetType.Float)) {
+            } else if (type.equals(TargetType.float_)) {
-                generateRelationalOperator(state, equal, type, FCMPL, IFEQ);
+                generateRelationalOperator(state, equal, TargetType.float_, FCMPL, IFEQ);
-            } else if (type.equals(TargetType.Double)) {
+            } else if (type.equals(TargetType.double_)) {
-                generateRelationalOperator(state, equal, type, DCMPL, IFEQ);
+                generateRelationalOperator(state, equal, TargetType.double_, DCMPL, IFEQ);
-            } else if (type.equals(TargetType.Char) || type.equals(TargetType.Short) || type.equals(TargetType.Byte) || type.equals(TargetType.Integer) || type.equals(TargetType.Boolean)) {
+            } else if (type.equals(TargetType.char_) || type.equals(TargetType.short_) || type.equals(TargetType.byte_) || type.equals(TargetType.int_) || type.equals(TargetType.boolean_)) {
-                generateRelationalOperator(state, equal, type, IF_ICMPEQ);
+                generateRelationalOperator(state, equal, TargetType.int_, IF_ICMPEQ);
             } else {
                 generateRelationalOperator(state, equal, type, IF_ACMPEQ);
             }
             break;
         }
         case NotEqual notEqual: {
-            var type = largerType(notEqual.left().type(), notEqual.right().type());
+            var type = TargetType.toPrimitive(largerType(notEqual.left().type(), notEqual.right().type()));
-            if (type.equals(TargetType.Long)) {
+            if (type.equals(TargetType.long_)) {
-                generateRelationalOperator(state, notEqual, type, LCMP, IFNE);
+                generateRelationalOperator(state, notEqual, TargetType.long_, LCMP, IFNE);
-            } else if (type.equals(TargetType.Float)) {
+            } else if (type.equals(TargetType.float_)) {
-                generateRelationalOperator(state, notEqual, type, FCMPL, IFNE);
+                generateRelationalOperator(state, notEqual, TargetType.float_, FCMPL, IFNE);
-            } else if (type.equals(TargetType.Double)) {
+            } else if (type.equals(TargetType.double_)) {
-                generateRelationalOperator(state, notEqual, type, DCMPL, IFNE);
+                generateRelationalOperator(state, notEqual, TargetType.double_, DCMPL, IFNE);
-            } else if (type.equals(TargetType.Char) || type.equals(TargetType.Short) || type.equals(TargetType.Byte) || type.equals(TargetType.Integer)) {
+            } else if (type.equals(TargetType.char_) || type.equals(TargetType.short_) || type.equals(TargetType.byte_) || type.equals(TargetType.int_) || type.equals(TargetType.boolean_)) {
-                generateRelationalOperator(state, notEqual, type, IF_ICMPNE);
+                generateRelationalOperator(state, notEqual, TargetType.int_, IF_ICMPNE);
             } else {
                 generateRelationalOperator(state, notEqual, type, IF_ACMPNE);
             }
@@ -638,7 +688,7 @@ public class Codegen {
         } else if (op.expr() instanceof TargetFieldVar fieldVar) {
             generate(state, fieldVar.left());
             mv.visitInsn(SWAP);
-            mv.visitFieldInsn(PUTFIELD, fieldVar.owner().getInternalName(), fieldVar.right(), fieldVar.type().toSignature());
+            mv.visitFieldInsn(PUTFIELD, fieldVar.owner().getInternalName(), fieldVar.right(), fieldVar.type().toDescriptor());
         }
     }
 
@@ -650,6 +700,7 @@ public class Codegen {
                 generate(state, add.expr());
             case TargetUnaryOp.Negate negate -> {
                 generate(state, negate.expr());
+                convertTo(state, negate.expr().type(), TargetType.boolean_);
                 if (negate.type().equals(TargetType.Double))
                     mv.visitInsn(DNEG);
                 else if (negate.type().equals(TargetType.Float))
@@ -658,9 +709,11 @@ public class Codegen {
                     mv.visitInsn(LNEG);
                 else
                     mv.visitInsn(INEG);
+                boxPrimitive(state, TargetType.boolean_);
             }
             case TargetUnaryOp.Not not -> {
                 generate(state, not.expr());
+                convertTo(state, not.expr().type(), TargetType.boolean_);
                 if (not.type().equals(TargetType.Long)) {
                     mv.visitLdcInsn(-1L);
                     mv.visitInsn(LXOR);
@@ -668,93 +721,86 @@ public class Codegen {
                     mv.visitInsn(ICONST_M1);
                     mv.visitInsn(IXOR);
                 }
+                boxPrimitive(state, TargetType.boolean_);
             }
             case TargetUnaryOp.PreIncrement preIncrement -> {
                 generate(state, preIncrement.expr());
+                convertTo(state, preIncrement.expr().type(), TargetType.toPrimitive(op.type()));
                 if (preIncrement.type().equals(TargetType.Float)) {
                     mv.visitLdcInsn(1F);
                     mv.visitInsn(FADD);
-                    mv.visitInsn(DUP);
                 } else if (preIncrement.type().equals(TargetType.Double)) {
                     mv.visitLdcInsn(1D);
                     mv.visitInsn(DADD);
-                    mv.visitInsn(DUP2);
                 } else if (preIncrement.type().equals(TargetType.Long)) {
                     mv.visitLdcInsn(1L);
                     mv.visitInsn(LADD);
-                    mv.visitInsn(DUP2);
                 } else {
                     mv.visitLdcInsn(1);
                     mv.visitInsn(IADD);
-                    mv.visitInsn(DUP);
                 }
-                boxPrimitive(state, preIncrement.type());
+                boxPrimitive(state, TargetType.toPrimitive(op.type()));
+                mv.visitInsn(DUP);
                 afterIncDec(state, preIncrement);
             }
             case TargetUnaryOp.PreDecrement preDecrement -> {
                 generate(state, preDecrement.expr());
+                convertTo(state, preDecrement.expr().type(), TargetType.toPrimitive(op.type()));
                 if (preDecrement.type().equals(TargetType.Float)) {
                     mv.visitLdcInsn(1F);
                     mv.visitInsn(FSUB);
-                    mv.visitInsn(DUP);
                 } else if (preDecrement.type().equals(TargetType.Double)) {
                     mv.visitLdcInsn(1D);
                     mv.visitInsn(DSUB);
-                    mv.visitInsn(DUP2);
                 } else if (preDecrement.type().equals(TargetType.Long)) {
                     mv.visitLdcInsn(1L);
                     mv.visitInsn(LSUB);
-                    mv.visitInsn(DUP2);
                 } else {
                     mv.visitLdcInsn(1);
                     mv.visitInsn(ISUB);
-                    mv.visitInsn(DUP);
                 }
-                boxPrimitive(state, preDecrement.type());
+                boxPrimitive(state, TargetType.toPrimitive(op.type()));
+                mv.visitInsn(DUP);
                 afterIncDec(state, preDecrement);
             }
             case TargetUnaryOp.PostIncrement postIncrement -> {
                 generate(state, postIncrement.expr());
-                if (postIncrement.type().equals(TargetType.Float)) {
                 mv.visitInsn(DUP);
+                convertTo(state, postIncrement.expr().type(), TargetType.toPrimitive(op.type()));
+                if (postIncrement.type().equals(TargetType.Float)) {
                     mv.visitLdcInsn(1F);
                     mv.visitInsn(FADD);
                 } else if (postIncrement.type().equals(TargetType.Double)) {
-                    mv.visitInsn(DUP2);
                     mv.visitLdcInsn(1D);
                     mv.visitInsn(DADD);
                 } else if (postIncrement.type().equals(TargetType.Long)) {
-                    mv.visitInsn(DUP2);
                     mv.visitLdcInsn(1L);
                     mv.visitInsn(LADD);
                 } else {
-                    mv.visitInsn(DUP);
                     mv.visitLdcInsn(1);
                     mv.visitInsn(IADD);
                 }
-                boxPrimitive(state, postIncrement.type());
+                boxPrimitive(state, TargetType.toPrimitive(op.type()));
                 afterIncDec(state, postIncrement);
             }
             case TargetUnaryOp.PostDecrement postDecrement -> {
                 generate(state, postDecrement.expr());
-                if (postDecrement.type().equals(TargetType.Float)) {
                 mv.visitInsn(DUP);
+                convertTo(state, postDecrement.expr().type(), TargetType.toPrimitive(op.type()));
+                if (postDecrement.type().equals(TargetType.Float)) {
                     mv.visitLdcInsn(1F);
                     mv.visitInsn(FSUB);
                 } else if (postDecrement.type().equals(TargetType.Double)) {
-                    mv.visitInsn(DUP2);
                     mv.visitLdcInsn(1D);
                     mv.visitInsn(DSUB);
                 } else if (postDecrement.type().equals(TargetType.Long)) {
-                    mv.visitInsn(DUP2);
                     mv.visitLdcInsn(1L);
                     mv.visitInsn(LSUB);
                 } else {
-                    mv.visitInsn(DUP);
                     mv.visitLdcInsn(1);
                     mv.visitInsn(ISUB);
                 }
-                boxPrimitive(state, postDecrement.type());
+                boxPrimitive(state, TargetType.toPrimitive(op.type()));
                 afterIncDec(state, postDecrement);
             }
         }
@@ -801,7 +847,7 @@ public class Codegen {
         var handle = new Handle(state.isStatic ? H_INVOKESTATIC : H_INVOKEVIRTUAL, clazz.getName(), impl.name(), implSignature.getDescriptor(), false);
 
         var params = new ArrayList<TargetType>();
-        if(!state.isStatic) params.add(new TargetRefType(clazz.qualifiedName().getClassName()));
+        if(!state.isStatic) params.add(new TargetRefType(clazz.qualifiedName().toString()));
         params.addAll(lambda.captures().stream().map(mp -> mp.pattern().type()).toList());
 
         if (!state.isStatic)
@@ -940,7 +986,7 @@ public class Codegen {
                         mv.visitInsn(DUP);
                     else
                         mv.visitInsn(DUP_X1);
-                    mv.visitFieldInsn(dot.isStatic() ? PUTSTATIC : PUTFIELD, dot.owner().getInternalName(), dot.right(), fieldType.toSignature());
+                    mv.visitFieldInsn(dot.isStatic() ? PUTSTATIC : PUTFIELD, dot.owner().getInternalName(), dot.right(), fieldType.toDescriptor());
                 }
                 default -> throw new CodeGenException("Invalid assignment");
             }
@@ -951,14 +997,14 @@ public class Codegen {
             mv.visitVarInsn(ALOAD, local.index());
             // This is a bit weird but sometimes the types don't match (see lambda expressions)
             convertTo(state, local.type(), localVar.type());
-            unboxPrimitive(state, local.type());
+            //unboxPrimitive(state, local.type());
             break;
         }
         case TargetFieldVar dot: {
             if (!dot.isStatic())
                 generate(state, dot.left());
-            mv.visitFieldInsn(dot.isStatic() ? GETSTATIC : GETFIELD, dot.left().type().getInternalName(), dot.right(), dot.type().toSignature());
+            mv.visitFieldInsn(dot.isStatic() ? GETSTATIC : GETFIELD, dot.left().type().getInternalName(), dot.right(), dot.type().toDescriptor());
-            unboxPrimitive(state, dot.type());
+            //unboxPrimitive(state, dot.type());
             break;
         }
         case TargetFor _for: {
@@ -974,11 +1020,14 @@ public class Codegen {
             Label start = new Label();
             Label end = new Label();
             mv.visitLabel(start);
-            if (_for.termination() != null)
+            if (_for.termination() != null) {
                 generate(state, _for.termination());
-            else
+                convertTo(state, _for.termination().type(), TargetType.boolean_);
+                mv.visitJumpInsn(IFEQ, end);
+            } else {
                 mv.visitInsn(ICONST_1);
                 mv.visitJumpInsn(IFEQ, end);
+            }
 
             var env = new BreakEnv();
             env.startLabel = start;
@@ -1010,6 +1059,7 @@ public class Codegen {
             Label end = new Label();
             mv.visitLabel(start);
             generate(state, _while.cond());
+            convertTo(state, _while.cond().type(), TargetType.boolean_);
             mv.visitJumpInsn(IFEQ, end);
 
             var env = new BreakEnv();
@@ -1040,6 +1090,7 @@ public class Codegen {
 
             mv.visitLabel(check);
             generate(state, _do.cond());
+            convertTo(state, _do.cond().type(), TargetType.boolean_);
             mv.visitJumpInsn(IFEQ, end);
             mv.visitJumpInsn(GOTO, start);
             mv.visitLabel(end);
@@ -1047,6 +1098,7 @@ public class Codegen {
         }
         case TargetIf _if: {
             generate(state, _if.cond());
+            convertTo(state, _if.cond().type(), TargetType.boolean_);
             Label _else = new Label();
             Label end = new Label();
             mv.visitJumpInsn(IFEQ, _else);
@@ -1064,11 +1116,10 @@ public class Codegen {
                 if (state.returnType instanceof TargetPrimitiveType) {
                     generate(state, ret.expression());
 
-                    unboxPrimitive(state, state.returnType);
+                    convertTo(state, ret.expression().type(), state.returnType);
                     mv.visitInsn(findReturnCode(state.returnType));
                 } else {
                     generate(state, ret.expression());
-                    boxPrimitive(state, ret.expression().type());
                     convertTo(state, ret.expression().type(), state.returnType);
                     mv.visitInsn(ARETURN);
                 }
@@ -1120,8 +1171,6 @@ public class Codegen {
                 var arg = call.parameterTypes().get(i);
                 generate(state, e);
                 convertTo(state, e.type(), arg);
-                if (!(arg instanceof TargetPrimitiveType))
-                    boxPrimitive(state, e.type());
             }
             var descriptor = call.getDescriptor();
             if (call.owner() instanceof TargetFunNType) // Decay FunN
@@ -1134,11 +1183,13 @@ public class Codegen {
 
             mv.visitMethodInsn(insn, call.owner().getInternalName(), call.name(), descriptor, call.isInterface());
 
-            if (call.type() != null && call.returnType() != null && !(call.returnType() instanceof TargetPrimitiveType)) {
+            /*if (call.type() != null && call.returnType() != null && !(call.returnType() instanceof TargetPrimitiveType)) {
                 if (!call.returnType().equals(call.type()) && !(call.type() instanceof TargetGenericType))
                     mv.visitTypeInsn(CHECKCAST, call.type().getInternalName());
                 unboxPrimitive(state, call.type());
-            }
+            }*/
+            if (call.type() != null)
+                convertTo(state, call.returnType(), call.type());
             break;
         }
         case TargetLambdaExpression lambda:
@@ -1161,6 +1212,7 @@ public class Codegen {
         }
         case TargetTernary ternary: {
             generate(state, ternary.cond());
+            convertTo(state, ternary.cond().type(), TargetType.boolean_);
             var iffalse = new Label();
             var end = new Label();
             mv.visitJumpInsn(IFEQ, iffalse);
@@ -1214,6 +1266,7 @@ public class Codegen {
         if (instanceOf.right() instanceof TargetTypePattern right && right.name() == null) {
             generate(state, instanceOf.left());
             mv.visitTypeInsn(INSTANCEOF, right.type().getInternalName());
+            boxPrimitive(state, TargetType.boolean_);
             return;
         }
 
@@ -1408,7 +1461,7 @@ public class Codegen {
         if (aSwitch.isExpression()) {
             if (aSwitch.type() != null) {
                 mv.visitVarInsn(ALOAD, state.switchResultValue.peek());
-                unboxPrimitive(state, aSwitch.type());
+                //unboxPrimitive(state, aSwitch.type());
             }
             state.popSwitch();
         }
@@ -1421,12 +1474,12 @@ public class Codegen {
             throw new CodeGenException("Couldn't find suitable field accessor for '" + type.name() + "'");
         var field = clazz.getFieldDecl().get(i);
         var fieldType = converter.convert(field.getType());
-        state.mv.visitMethodInsn(INVOKEVIRTUAL, type.getInternalName(), field.getName(), "()" + fieldType.toSignature(), false);
+        state.mv.visitMethodInsn(INVOKEVIRTUAL, type.getInternalName(), field.getName(), "()" + fieldType.toDescriptor(), false);
     }
 
     private void bindPattern(State state, TargetType type, TargetPattern pat, Label start, int index, int depth) {
-        if (pat.type() instanceof TargetPrimitiveType)
+        //if (pat.type() instanceof TargetPrimitiveType)
-            boxPrimitive(state, pat.type());
+        //   boxPrimitive(state, pat.type());
 
         if (pat.type() instanceof TargetRefType) {
             state.mv.visitInsn(DUP);
@@ -1447,13 +1500,14 @@ public class Codegen {
         }
 
         if (pat instanceof TargetExpressionPattern ep) {
-            var cur = state.createVariable(pat.type());
+            var cur = state.createVariable(TargetType.toWrapper(pat.type()));
             state.mv.visitVarInsn(ASTORE, cur.index);
 
             var expr = new Equal(pat.type(), new TargetLocalVar(cur.type, cur.name), ep.expression());
             generate(state, expr);
 
             var cont = new Label();
+            unboxPrimitive(state, TargetType.Boolean);
             state.mv.visitJumpInsn(IFNE, cont);
             for (var i = 0; i < depth - 1; i++) {
                 state.mv.visitInsn(POP);
@@ -1526,7 +1580,7 @@ public class Codegen {
         //if ((access & ACC_PRIVATE) == 0 && (access & ACC_PROTECTED) == 0) // TODO Implement access modifiers properly
         //    access |= ACC_PUBLIC;
 
-        cw.visitField(access, field.name(), field.type().toSignature(), field.type().toDescriptor(), null);
+        cw.visitField(access, field.name(), field.type().toDescriptor(), field.type().toSignature(), null);
     }
 
     private void generateStaticConstructor(TargetMethod constructor) {
@@ -1597,8 +1651,27 @@ public class Codegen {
         generateMethod(method, null);
     }
 
+    private void generateMainMethod() {
+        var mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);
+        mv.visitCode();
+        mv.visitVarInsn(ALOAD, 0);
+        mv.visitMethodInsn(INVOKESTATIC, "java/util/List", "of", "([Ljava/lang/Object;)Ljava/util/List;", true);
+        mv.visitMethodInsn(INVOKESTATIC, new TargetRefType(clazz.qualifiedName().toString()).getInternalName(), "main", "(Ljava/util/List;)V", false);
+        mv.visitInsn(RETURN);
+        mv.visitMaxs(0, 0);
+        mv.visitEnd();
+    }
+
     private void generateMethod(TargetMethod method, State parent) {
         var access = method.access();
+
+        var params = method.signature().parameters();
+        if (method.name().equals("main") && method.isStatic() && params.size() == 1 &&
+            params.getFirst().pattern().type().equals(new TargetRefType("java.util.List", List.of(new TargetRefType("java.lang.String"))))) {
+
+            generateMainMethod();
+        }
+
         if (method.block() == null)
             access |= ACC_ABSTRACT;
         if (clazz instanceof TargetInterface)
@@ -1640,12 +1713,14 @@ public class Codegen {
         if (!generics.isEmpty()) {
             ret += "<";
             for (var generic : generics) {
-                ret += generic.name() + ":" + generic.bound().toDescriptor();
+                ret += generic.name() + ":" + generic.bound().toSignature();
             }
             ret += ">";
         }
         if (clazz.superType() != null)
-            ret += clazz.superType().toDescriptor();
+            ret += clazz.superType().toSignature();
+        else ret += "Ljava/lang/Object;";
+
         for (var intf : clazz.implementingInterfaces()) {
             ret += intf.toSignature();
         }
@@ -1748,8 +1823,12 @@ public class Codegen {
                 } else convertTo(state, fromReturn, toReturn);
             }
 
-            if (toReturn != null)
+            if (toReturn != null) {
+                if ((fromReturn instanceof TargetRefType || fromReturn instanceof TargetGenericType)
+                        && (toReturn instanceof TargetPrimitiveType))
+                    unboxPrimitive(state, TargetType.toWrapper(toReturn));
                 mv.visitInsn(findReturnCode(toReturn));
+            }
 
             else mv.visitInsn(RETURN);
             mv.visitMaxs(0, 0);
@@ -1757,7 +1836,7 @@ public class Codegen {
 
             cw2.visitEnd();
             var bytes = cw2.toByteArray();
-            converter.auxiliaries.put(className, bytes);
+            compiler.auxiliaries.put(className, bytes);
 
             // TODO These class loading shenanigans happen in a few places, the tests load the classes individually.
             // Instead we should just look at the folder.
@@ -1771,6 +1850,9 @@ public class Codegen {
         }
 
         cw.visitEnd();
+        ClassReader cr = new ClassReader(cw.toByteArray());
+        System.out.println("Checking class " + className);
+        CheckClassAdapter.verify(cr, false, new PrintWriter(System.err));
         return cw.toByteArray();
     }
 
@@ -1800,7 +1882,7 @@ public class Codegen {
         bootstrapArgs[1] = String.join(";", clazz.fields().stream().map(TargetField::name).toArray(String[]::new));
         for (var i = 0; i < clazz.fields().size(); i++) {
             var field = clazz.fields().get(i);
-            var fieldRef = new Handle(H_GETFIELD, clazz.getName(), field.name(), field.type().toSignature(), false);
+            var fieldRef = new Handle(H_GETFIELD, clazz.getName(), field.name(), field.type().toDescriptor(), false);
             bootstrapArgs[i + 2] = fieldRef;
         }
 

src/main/java/de/dhbwstuttgart/bytecode/FunNGenerator.java

@@ -98,7 +98,7 @@ public class FunNGenerator {
     }
 
     private static String applySignature(TargetType a) { return a.toSignature(); }
-    private static String applyNameDescriptor(TargetType a){ return a instanceof TargetGenericType ? "LTPH;" : String.format("%s", applySignature(a)); }
+    private static String applyNameDescriptor(TargetType a){ return a instanceof TargetGenericType ? "LTPH;" : String.format("%s", a.toDescriptor()); }
 
     public static String encodeType(TargetType type) {
         if (type == null) return VOID;

src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java

@@ -2,6 +2,7 @@
 package de.dhbwstuttgart.core;
 
 import de.dhbwstuttgart.bytecode.Codegen;
+import de.dhbwstuttgart.bytecode.FunNGenerator;
 import de.dhbwstuttgart.environment.CompilationEnvironment;
 import de.dhbwstuttgart.environment.DirectoryClassLoader;
 import de.dhbwstuttgart.exceptions.DebugException;
@@ -73,6 +74,11 @@ public class JavaTXCompiler {
 	public final List<File> classPath;
 	private final File outputPath;
 
+	public final Map<String, FunNGenerator.GenericParameters> usedFunN = new HashMap<>();
+	public final Set<Integer> usedFunNSuperTypes = new HashSet<>();
+
+	public Map<String, byte[]> auxiliaries = new HashMap<>();
+
 	public DirectoryClassLoader getClassLoader() {
 		return classLoader;
 	}
@@ -646,7 +652,7 @@ public class JavaTXCompiler {
 		}
 		generatedGenerics.put(sf, converter.javaGenerics());
 		converter.generateFunNTypes();
-		converter.auxiliaries.forEach((name, source) -> {
+		auxiliaries.forEach((name, source) -> {
 			generatedClasses.put(new JavaClassName(name), source);
 		});
 		return generatedClasses;

src/main/java/de/dhbwstuttgart/environment/CompilationEnvironment.java

@@ -30,7 +30,7 @@ public class CompilationEnvironment {
 	public final PackageCrawler packageCrawler;
 
 	/**
-	 * Imitiert die Environment beim Aufruf des JavaCompilers auf einer Menge von java-Dateien Die Environment enth<EFBFBD>lt automatisch die Java Standard Library
+	 * Imitiert die Environment beim Aufruf des JavaCompilers auf einer Menge von java-Dateien Die Environment enthält automatisch die Java Standard Library
 	 * 
 	 * @param sourceFiles die zu kompilierenden Dateien
 	 */

src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/StatementGenerator.java

@@ -150,7 +150,7 @@ public class StatementGenerator {
                 } else {
                 	type = methodparameters?
                 			TypePlaceholder.fresh(fp.getStart(), 1, false) 
-                			: TypePlaceholder.fresh(fp.getStart());
+                			: TypePlaceholder.fresh(fp.getStart(), 1, false);
                 }
                 ret.add(new FormalParameter(paramName, type, fp.getStart()));
                 localVars.put(paramName, type); 
@@ -1065,7 +1065,7 @@ public class StatementGenerator {
             List<Pattern> parameterList = new ArrayList<>();
             for (IdentifierContext identifier : lambdaParams.identifier()) {
                 Token offset = identifier.getStart();
-                parameterList.add(new FormalParameter(identifier.getText(), TypePlaceholder.fresh(offset), offset));
+                parameterList.add(new FormalParameter(identifier.getText(), TypePlaceholder.fresh(offset, 1, false), offset));
             }
             params = new ParameterList(parameterList, lambdaParams.getStart());
         } else if (lambdaParams.formalParameterList() != null) {
@@ -1075,7 +1075,7 @@ public class StatementGenerator {
             List<Pattern> parameterList = new ArrayList<>();
             for (LambdaLVTIParameterContext param : lambdaParams.lambdaLVTIList().lambdaLVTIParameter()) {
                 Token offset = param.getStart();
-                parameterList.add(new FormalParameter(param.identifier().getText(), TypePlaceholder.fresh(offset), offset));
+                parameterList.add(new FormalParameter(param.identifier().getText(), TypePlaceholder.fresh(offset, 1, false), offset));
             }
             params = new ParameterList(parameterList, lambdaParams.getStart());
         } else {

src/main/java/de/dhbwstuttgart/parser/SyntaxTreeGenerator/SyntaxTreeGenerator.java

@@ -111,7 +111,7 @@ public class SyntaxTreeGenerator {
     this.allmodifiers.put(Modifier.toString(Modifier.INTERFACE), Modifier.INTERFACE);
     this.allmodifiers.put("sealed", 4096);
     this.allmodifiers.put("non-sealed", 8192);
-    this.allmodifiers.put("default", 16384);
+    this.allmodifiers.put("default", 0); // Doesn't exist
     this.allmodifiers.put("strictfp", 32768);
 
     this.compiler = compiler;

src/main/java/de/dhbwstuttgart/parser/scope/JavaClassName.java

@@ -41,7 +41,7 @@ public class JavaClassName {
 	}
 
 	/**
-	 * Gibt von einem Klassennamen nur den Namen der Klasse zur<EFBFBD>ck
+	 * Gibt von einem Klassennamen nur den Namen der Klasse zurück
 	 * Beispiel:
 	 * java.lang.Object wird zu: Object
 	 */

src/main/java/de/dhbwstuttgart/parser/scope/JavaClassRegistry.java

@@ -5,7 +5,7 @@ import de.dhbwstuttgart.exceptions.NotImplementedException;
 import java.util.*;
 
 /**
- * Speichert die Klassen f<EFBFBD>r einen bestimmten Projektscope
+ * Speichert die Klassen für einen bestimmten Projektscope
  */
 public class JavaClassRegistry{
     final Map<JavaClassName, Integer> existingClasses = new HashMap<>();

src/main/java/de/dhbwstuttgart/syntaxtree/ClassOrInterface.java

@@ -6,10 +6,12 @@ import de.dhbwstuttgart.syntaxtree.type.GenericRefType;
 import de.dhbwstuttgart.syntaxtree.type.RefType;
 import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
 import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.target.tree.TargetGeneric;
 import org.antlr.v4.runtime.Token;
 
 import java.lang.reflect.Modifier;
 import java.util.*;
+import java.util.stream.Collectors;
 
 /**
  * Stellt jede Art von Klasse dar. Auch abstrakte Klassen und Interfaces
@@ -31,6 +33,7 @@ public class ClassOrInterface extends SyntaxTreeNode implements TypeScope {
   private List<RefType> implementedInterfaces;
   private List<RefType> permittedSubtypes;
   private List<Constructor> constructors;
+  private Set<GenericTypeVar> userDefinedGenerics;
 
   public ClassOrInterface(int modifiers, JavaClassName name, List<Field> fielddecl, Optional<Constructor> fieldInitializations, Optional<Method> staticInitializer, List<Method> methods, List<Constructor> constructors, GenericDeclarationList genericClassParameters, RefType superClass, Boolean isInterface, Boolean isFunctionalInterface, List<RefType> implementedInterfaces, List<RefType> permittedSubtypes, Token offset, String fileName) {
     super(offset);
@@ -199,4 +202,22 @@ public class ClassOrInterface extends SyntaxTreeNode implements TypeScope {
   public int hashCode() {
     return Objects.hash(name);
   }
+
+  public Set<GenericTypeVar> getUserDefinedGenerics() {
+    if (this.userDefinedGenerics != null) return this.userDefinedGenerics;
+
+    var genericsIter = getGenerics().iterator();
+    if (genericsIter.hasNext()) {
+      // Add empty set of generics to cache so that it doesn't try to calculate it later
+      this.userDefinedGenerics = new HashSet<>();
+      while (genericsIter.hasNext()) {
+        var next = genericsIter.next();
+        userDefinedGenerics.add(next);
+      }
+    } else {
+      this.userDefinedGenerics = new HashSet<>();
+    }
+
+    return this.userDefinedGenerics;
+  }
 }

src/main/java/de/dhbwstuttgart/syntaxtree/SourceFile.java

@@ -5,8 +5,10 @@ import java.util.*;
 
 import de.dhbwstuttgart.parser.NullToken;
 import de.dhbwstuttgart.parser.scope.JavaClassName;
+import de.dhbwstuttgart.target.generate.ASTToTargetAST;
 import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
 import de.dhbwstuttgart.typeinference.assumptions.TypeInferenceInformation;
+import de.dhbwstuttgart.typeinference.result.ResultSet;
 //import sun.security.x509.X509CertInfo;
 
 public class SourceFile extends SyntaxTreeNode {
@@ -18,6 +20,7 @@ public class SourceFile extends SyntaxTreeNode {
   private boolean isGenerated;
 
   public List<ClassOrInterface> availableClasses = new ArrayList<>();
+  public List<ASTToTargetAST.Generics> generics = new ArrayList<>();
 
   /**
    * Die SourceFile repräsntiert eine zu einem Syntaxbaum eingelesene Java-Datei.
@@ -40,6 +43,10 @@ public class SourceFile extends SyntaxTreeNode {
     this.imports = new HashSet<>(sf.imports);
   }
 
+  public void addResultSet(ResultSet rs) {
+
+  }
+
   public void setPackageName(String packageName) {
     this.pkgName = packageName;
   }

src/main/java/de/dhbwstuttgart/target/generate/ASTToTargetAST.java

@@ -36,7 +36,6 @@ public class ASTToTargetAST {
     public Generics generics;
     public List<Generics> currentMethodOverloads;
 
-    final Map<ClassOrInterface, Set<GenericTypeVar>> userDefinedGenerics = new HashMap<>();
     final Map<Method, Set<SignaturePair>> tphsInMethods = new HashMap<>();
     private Method currentMethod;
 
@@ -61,8 +60,10 @@ public class ASTToTargetAST {
     }
 
     public record Generics(JavaGenerics javaGenerics, TxGenerics txGenerics) {
+        public Generics(JavaTXCompiler compiler, ResultSet set) {
+            this(new JavaGenerics(compiler, set), new TxGenerics(compiler, set));
+        }
     }
-
 
     public IByteArrayClassLoader classLoader;
     protected SourceFile sourceFile;
@@ -81,9 +82,9 @@ public class ASTToTargetAST {
 
         all = new ArrayList<>();
         for (var set : resultSets) {
-            all.add(new Generics(new JavaGenerics(this, set), new TxGenerics(this, set)));
+            all.add(new Generics(compiler, set));
         }
-        this.generics = all.get(0);
+        this.generics = all.getFirst();
     }
 
     public void addSignaturePair(TypePlaceholder signature, RefTypeOrTPHOrWildcardOrGeneric parameter) {
@@ -93,9 +94,13 @@ public class ASTToTargetAST {
     }
 
     Optional<Method> findMethod(ClassOrInterface owner, String name, List<TargetType> argumentList) {
+        return findMethod(owner, name, argumentList, this.generics.javaGenerics, this.compiler);
+    }
+
+    public static Optional<Method> findMethod(ClassOrInterface owner, String name, List<TargetType> argumentList, GenerateGenerics generics, JavaTXCompiler compiler) {
         Optional<Method> method = Optional.empty();
         while (method.isEmpty()) {
-            method = owner.getMethods().stream().filter(m -> m.name.equals(name) && parameterEquals(m.getParameterList(), argumentList)).findFirst();
+            method = owner.getMethods().stream().filter(m -> m.name.equals(name) && parameterEquals(m.getParameterList(), argumentList, generics)).findFirst();
             if (owner.getClassName().toString().equals("java.lang.Object")) break;
             owner = compiler.getClass(owner.getSuperClass().getName());
         }
@@ -103,16 +108,16 @@ public class ASTToTargetAST {
     }
 
     Optional<Constructor> findConstructor(ClassOrInterface owner, List<TargetType> argumentList) {
-        return owner.getConstructors().stream().filter(c -> parameterEquals(c.getParameterList(), argumentList)).findFirst();
+        return owner.getConstructors().stream().filter(c -> parameterEquals(c.getParameterList(), argumentList, generics.javaGenerics)).findFirst();
     }
 
-    boolean parameterEquals(ParameterList parameterList, List<TargetType> arguments) {
+    static boolean parameterEquals(ParameterList parameterList, List<TargetType> arguments, GenerateGenerics generics) {
         var pars = parameterList.getFormalparalist();
         if (pars.size() != arguments.size())
             return false;
 
         for (var i = 0; i < pars.size(); i++) {
-            var type1 = convert(pars.get(i).getType(), generics.javaGenerics);
+            var type1 = generics.getTargetType(pars.get(i).getType());
             var type2 = arguments.get(i);
             if (type1 instanceof TargetGenericType)
                 return true;
@@ -350,19 +355,14 @@ public class ASTToTargetAST {
         Set<TargetGeneric> javaGenerics = new HashSet<>();
         Set<TargetGeneric> txGenerics = new HashSet<>();
 
-        var genericsIter = input.getGenerics().iterator();
+        var userDefinedGenerics = input.getUserDefinedGenerics();
-        if (genericsIter.hasNext()) {
+        if (!userDefinedGenerics.isEmpty()) {
             // Add empty set of generics to cache so that it doesn't try to calculate it later
-            var userDefinedGenerics = new HashSet<GenericTypeVar>();
+            for (var generic : userDefinedGenerics) {
-            this.userDefinedGenerics.put(input, userDefinedGenerics);
+                // TODO Support multiple bouds
-            while (genericsIter.hasNext()) {
+                javaGenerics.add(new TargetGeneric(generic.getName(), convert(generic.getBounds().getFirst())));
-                var next = genericsIter.next();
-                userDefinedGenerics.add(next);
-                // TODO Support multiple bounds
-                javaGenerics.add(new TargetGeneric(next.getName(), convert(next.getBounds().get(0))));
             }
         } else {
-            this.userDefinedGenerics.put(input, new HashSet<>());
             // Generate generics only if there are no user defined ones
             javaGenerics = convert(generics.javaGenerics.generics(input), generics.javaGenerics);
             txGenerics = convert(generics.txGenerics.generics(input), generics.txGenerics);
@@ -424,7 +424,7 @@ public class ASTToTargetAST {
     }
 
     private List<TargetConstructor> convert(ClassOrInterface currentClass, Constructor input, TargetBlock fieldInitializer) {
-        generics = all.get(0);
+        generics = all.getFirst();
         List<TargetConstructor> result = new ArrayList<>();
         Set<List<MethodParameter>> parameterSet = new HashSet<>();
         this.currentMethod = input;
@@ -468,13 +468,6 @@ public class ASTToTargetAST {
         }
     }
 
-    private TargetType unwrap(TargetType type) {
-        if (type instanceof TargetRefType ref) {
-            if (!ref.params().isEmpty()) return new TargetRefType(ref.name());
-        }
-        return type;
-    }
-
     private TargetExpression generatePatternOverloadsRec(int offset, TargetExpression switchExpr, List<TargetLocalVar> params, List<TargetPattern> patterns, List<TargetMethod> methods, TargetType classType) {
         if (methods.isEmpty()) throw new DebugException("Couldn't find a candidate for switch overloading");
         if (methods.size() == 1) {
@@ -745,11 +738,6 @@ public class ASTToTargetAST {
         return new TargetField(input.modifier, convert(input.getType(), generics.javaGenerics), input.getName());
     }
 
-    private final Map<String, FunNGenerator.GenericParameters> usedFunN = new HashMap<>();
-    private final Set<Integer> usedFunNSuperTypes = new HashSet<>();
-
-    public Map<String, byte[]> auxiliaries = new HashMap<>();
-
     public TargetType convert(RefTypeOrTPHOrWildcardOrGeneric input) {
         return convert(input, generics.javaGenerics);
     }
@@ -818,20 +806,24 @@ public class ASTToTargetAST {
     }
 
     public void generateFunNTypes() {
-        for (var entry : usedFunN.entrySet()) {
+        for (var entry : compiler.usedFunN.entrySet()) {
             var gep = entry.getValue();
-            var superInterfaces = usedFunN.values().stream()
+            var superInterfaces = compiler.usedFunN.values().stream()
                 .filter(g -> !g.equals(gep))
                 .filter(genericParameters -> isSubtype(gep, genericParameters))
                 .map(FunNGenerator::getSpecializedClassName)
                 .toList();
 
             var code = FunNGenerator.generateSpecializedBytecode(gep, superInterfaces);
-            auxiliaries.put(entry.getKey(), code);
+            compiler.auxiliaries.put(entry.getKey(), code);
         }
     }
 
-    protected TargetType convert(RefTypeOrTPHOrWildcardOrGeneric input, GenerateGenerics generics) {
+    public TargetType convert(RefTypeOrTPHOrWildcardOrGeneric input, GenerateGenerics generics) {
+        return convert(input, generics, compiler);
+    }
+
+    public static TargetType convert(RefTypeOrTPHOrWildcardOrGeneric input, GenerateGenerics generics, JavaTXCompiler compiler) {
         return input.acceptTV(new TypeVisitor<>() {
             @Override
             public TargetType visit(RefType refType) {
@@ -843,31 +835,31 @@ public class ASTToTargetAST {
                 }
 
                 var params = refType.getParaList().stream().map(type -> {
-                    return convert(type, generics);
+                    return convert(type, generics, compiler);
                 }).toList();
 
                 if (name.matches("Fun\\d+\\$\\$")) { // TODO This seems like a bad idea
                     var returnType = FunNGenerator.getReturnType(params);
                     var className = FunNGenerator.getSpecializedClassName(FunNGenerator.getArguments(params), returnType);
-                    if (!usedFunNSuperTypes.contains(params.size())) {
+                    if (!compiler.usedFunNSuperTypes.contains(params.size())) {
-                        usedFunNSuperTypes.add(params.size());
+                        compiler.usedFunNSuperTypes.add(params.size());
                         var code = FunNGenerator.generateSuperBytecode(params.size() - 1, returnType != null ? 1 : 0);
                         var superClassName = FunNGenerator.getSuperClassName(params.size() - 1, returnType != null ? 1 : 0);
                         try {
-                            classLoader.findClass(superClassName);
+                            compiler.classLoader.findClass(superClassName);
                         } catch (ClassNotFoundException e) {
                             try {
-                                classLoader.loadClass(superClassName, code);
+                                compiler.classLoader.loadClass(superClassName, code);
                             } catch (LinkageError ignored) {}
                         }
-                        auxiliaries.put(superClassName, code);
+                        compiler.auxiliaries.put(superClassName, code);
                     }
                     FunNGenerator.GenericParameters gep = null;
-                    if (!usedFunN.containsKey(className)) {
+                    if (!compiler.usedFunN.containsKey(className)) {
                         gep = new FunNGenerator.GenericParameters(params, returnType != null ? 1 : 0);
-                        usedFunN.put(className, gep);
+                        compiler.usedFunN.put(className, gep);
                     } else {
-                        gep = usedFunN.get(className);
+                        gep = compiler.usedFunN.get(className);
                     }
                     return flattenFunNType(params, gep);
                 }
@@ -876,7 +868,7 @@ public class ASTToTargetAST {
 
             @Override
             public TargetType visit(SuperWildcardType superWildcardType) {
-                return new TargetSuperWildcard(convert(superWildcardType.getInnerType(), generics));
+                return new TargetSuperWildcard(convert(superWildcardType.getInnerType(), generics, compiler));
             }
 
             @Override
@@ -886,7 +878,7 @@ public class ASTToTargetAST {
 
             @Override
             public TargetType visit(ExtendsWildcardType extendsWildcardType) {
-                return new TargetExtendsWildcard(convert(extendsWildcardType.getInnerType(), generics));
+                return new TargetExtendsWildcard(convert(extendsWildcardType.getInnerType(), generics, compiler));
             }
 
             @Override

src/main/java/de/dhbwstuttgart/target/generate/GenerateGenerics.java

@@ -1,5 +1,7 @@
 package de.dhbwstuttgart.target.generate;
 
+import de.dhbwstuttgart.core.JavaTXCompiler;
+import de.dhbwstuttgart.parser.JavaTXParser;
 import de.dhbwstuttgart.parser.NullToken;
 import de.dhbwstuttgart.syntaxtree.*;
 import de.dhbwstuttgart.syntaxtree.statement.*;
@@ -18,7 +20,7 @@ import java.util.stream.Stream;
 
 public abstract class GenerateGenerics {
 
-    private final ASTToTargetAST astToTargetAST;
+    private final JavaTXCompiler compiler;
 
     public class TPH {
         private final TypePlaceholder wrap;
@@ -134,8 +136,8 @@ public abstract class GenerateGenerics {
     Map<TPH, RefTypeOrTPHOrWildcardOrGeneric> concreteTypes = new HashMap<>();
     Map<TypePlaceholder, TypePlaceholder> equality = new HashMap<>();
 
-    GenerateGenerics(ASTToTargetAST astToTargetAST, ResultSet constraints) {
+    GenerateGenerics(JavaTXCompiler compiler, ResultSet constraints) {
-        this.astToTargetAST = astToTargetAST;
+        this.compiler = compiler;
         for (var constraint : constraints.results) {
             if (constraint instanceof PairTPHsmallerTPH p) {
                 System.out.println(p.left + " " + p.left.getVariance());
@@ -281,7 +283,7 @@ public abstract class GenerateGenerics {
             Set<TPH> typeVariablesOfClass,
             Set<Pair> result
     ) {
-        var userDefinedGenericsOfClass = astToTargetAST.userDefinedGenerics.get(owner);
+        var userDefinedGenericsOfClass = owner.getUserDefinedGenerics();
 
         // Type variables with bounds that are also type variables of the method
         for (var typeVariable : new HashSet<>(typeVariables)) {
@@ -329,7 +331,7 @@ public abstract class GenerateGenerics {
 
                     if (methodCall.receiver instanceof ExpressionReceiver expressionReceiver) {
                         if (expressionReceiver.expr instanceof This) {
-                            var optMethod = astToTargetAST.findMethod(owner, methodCall.name, methodCall.signatureArguments().stream().map(astToTargetAST::convert).toList());
+                            var optMethod = ASTToTargetAST.findMethod(owner, methodCall.name, methodCall.signatureArguments().stream().map(x -> getTargetType(x)).toList(), GenerateGenerics.this, compiler);
                             if (optMethod.isEmpty()) return;
                             var method2 = optMethod.get();
                             System.out.println("In: " + method.getName() + " Method: " + method2.getName());
@@ -1005,8 +1007,8 @@ public abstract class GenerateGenerics {
             }
             var type = concreteTypes.get(new TPH(tph));
             if (type == null) return new TargetGenericType(tph.getName());
-            return astToTargetAST.convert(type, this);
+            return ASTToTargetAST.convert(type, this, compiler);
         }
-        return astToTargetAST.convert(in, this);
+        return ASTToTargetAST.convert(in, this, compiler);
     }
 }

src/main/java/de/dhbwstuttgart/target/generate/GenericsResult.java

@@ -69,8 +69,4 @@ public class GenericsResult {
             return this.generics.getType(tph);
         return type;
     }
-
-    public TargetType resolveTarget(RefTypeOrTPHOrWildcardOrGeneric type) {
-        return this.generics.getTargetType(type);
-    }
 }

src/main/java/de/dhbwstuttgart/target/generate/JavaGenerics.java

@@ -1,5 +1,6 @@
 package de.dhbwstuttgart.target.generate;
 
+import de.dhbwstuttgart.core.JavaTXCompiler;
 import de.dhbwstuttgart.syntaxtree.ClassOrInterface;
 import de.dhbwstuttgart.syntaxtree.Method;
 import de.dhbwstuttgart.typeinference.result.ResultSet;
@@ -7,8 +8,8 @@ import de.dhbwstuttgart.typeinference.result.ResultSet;
 import java.util.Set;
 
 final class JavaGenerics extends GenerateGenerics {
-    JavaGenerics(ASTToTargetAST astToTargetAST, ResultSet constraints) {
+    JavaGenerics(JavaTXCompiler compiler, ResultSet constraints) {
-        super(astToTargetAST, constraints);
+        super(compiler, constraints);
     }
 
     @Override

src/main/java/de/dhbwstuttgart/target/generate/StatementToTargetExpression.java

@@ -161,7 +161,6 @@ public class StatementToTargetExpression implements ASTVisitor {
 
     @Override
     public void visit(FieldVar fieldVar) {
-        var isStatic = false;
         var type = converter.convert(fieldVar.receiver.getType());
         var clazz = converter.compiler.getClass(new JavaClassName(type.name()));
         var field = clazz.getField(fieldVar.fieldVarName).orElseThrow();

src/main/java/de/dhbwstuttgart/target/generate/TxGenerics.java

@@ -1,5 +1,6 @@
 package de.dhbwstuttgart.target.generate;
 
+import de.dhbwstuttgart.core.JavaTXCompiler;
 import de.dhbwstuttgart.syntaxtree.ClassOrInterface;
 import de.dhbwstuttgart.syntaxtree.Method;
 import de.dhbwstuttgart.typeinference.result.ResultSet;
@@ -7,8 +8,8 @@ import de.dhbwstuttgart.typeinference.result.ResultSet;
 import java.util.Set;
 
 final class TxGenerics extends GenerateGenerics {
-    TxGenerics(ASTToTargetAST astToTargetAST, ResultSet constraints) {
+    TxGenerics(JavaTXCompiler compiler, ResultSet constraints) {
-        super(astToTargetAST, constraints);
+        super(compiler, constraints);
     }
 
     @Override

src/main/java/de/dhbwstuttgart/target/tree/TargetMethod.java

@@ -36,30 +36,30 @@ public record TargetMethod(int access, String name, TargetBlock block, Signature
     public static String getDescriptor(TargetType returnType, TargetType... parameters) {
         String ret = "(";
         for (var parameterType : parameters) {
-            ret += parameterType.toSignature();
+            ret += parameterType.toDescriptor();
         }
         ret += ")";
         if (returnType == null) ret += "V";
-        else ret += returnType.toSignature();
+        else ret += returnType.toDescriptor();
         return ret;
     }
 
     public static String getSignature(Set<TargetGeneric> generics, List<MethodParameter> parameters, TargetType returnType) {
         String ret = "";
-        if (generics.size() > 0) {
+        if (!generics.isEmpty()) {
             ret += "<";
             for (var generic : generics) {
-                ret += generic.name() + ":" + generic.bound().toDescriptor();
+                ret += generic.name() + ":" + generic.bound().toSignature();
             }
             ret += ">";
         }
         ret += "(";
         for (var param : parameters) {
-            ret += param.pattern().type().toDescriptor();
+            ret += param.pattern().type().toSignature();
         }
         ret += ")";
         if (returnType == null) ret += "V";
-        else ret += returnType.toDescriptor();
+        else ret += returnType.toSignature();
         return ret;
     }
 

src/main/java/de/dhbwstuttgart/target/tree/expression/TargetLiteral.java

@@ -8,42 +8,42 @@ public sealed interface TargetLiteral extends TargetExpression {
     record BooleanLiteral(Boolean value) implements TargetLiteral {
         @Override
         public TargetType type() {
-            return TargetType.Boolean;
+            return TargetType.boolean_;
         }
     }
 
     record CharLiteral(Character value) implements TargetLiteral {
         @Override
         public TargetType type() {
-            return TargetType.Char;
+            return TargetType.char_;
         }
     }
 
     record IntLiteral(Integer value) implements TargetLiteral {
         @Override
         public TargetType type() {
-            return TargetType.Integer;
+            return TargetType.int_;
         }
     }
 
     record LongLiteral(Long value) implements TargetLiteral {
         @Override
         public TargetType type() {
-            return TargetType.Long;
+            return TargetType.long_;
         }
     }
 
     record FloatLiteral(Float value) implements TargetLiteral {
         @Override
         public TargetType type() {
-            return TargetType.Float;
+            return TargetType.float_;
         }
     }
 
     record DoubleLiteral(Double value) implements TargetLiteral {
         @Override
         public TargetType type() {
-            return TargetType.Double;
+            return TargetType.double_;
         }
     }
 

src/main/java/de/dhbwstuttgart/target/tree/type/TargetExtendsWildcard.java

@@ -3,12 +3,12 @@ package de.dhbwstuttgart.target.tree.type;
 public record TargetExtendsWildcard(TargetType innerType) implements TargetType {
     @Override
     public String toSignature() {
-        return innerType.toSignature();
+        return "+" + innerType.toSignature();
     }
 
     @Override
     public String toDescriptor() {
-        return "+" + innerType.toDescriptor();
+        return innerType.toDescriptor();
     }
 
     @Override

src/main/java/de/dhbwstuttgart/target/tree/type/TargetFunNType.java

@@ -36,6 +36,7 @@ public record TargetFunNType(String name, List<TargetType> funNParams, List<Targ
 
     @Override
     public String toSignature() {
-        return "L" + getInternalName() + ";";
+        var args = FunNGenerator.getArguments(params);
+        return "LFun" + args.size() + "$$" + TargetSpecializedType.signatureParameters(params) + ";";
     }
 }

src/main/java/de/dhbwstuttgart/target/tree/type/TargetGenericType.java

@@ -2,12 +2,12 @@ package de.dhbwstuttgart.target.tree.type;
 
 public record TargetGenericType(String name) implements TargetType {
     @Override
-    public String toSignature() {
+    public String toDescriptor() {
         return "Ljava/lang/Object;"; // TODO Use bounds for this?
     }
 
     @Override
-    public String toDescriptor() {
+    public String toSignature() {
         return "T" + getInternalName() + ";";
     }
 

src/main/java/de/dhbwstuttgart/target/tree/type/TargetRefType.java

@@ -12,11 +12,6 @@ public record TargetRefType(String name, List<TargetType> params) implements Tar
         return this.name.replaceAll("\\.", "/");
     }
 
-    @Override
-    public String toSignature() {
-        return "L" + getInternalName() + ";";
-    }
-
     // Type erasure means we need to override hashCode and equals to only consider the name
     @Override
     public int hashCode() {

src/main/java/de/dhbwstuttgart/target/tree/type/TargetSpecializedType.java

@@ -6,16 +6,27 @@ public sealed interface TargetSpecializedType extends TargetType permits TargetF
     List<TargetType> params();
 
     @Override
-    default String toDescriptor() {
+    default String toSignature() {
         String ret = "L" + getInternalName();
-        if (params().size() > 0) {
+        ret += signatureParameters(params());
-            ret += "<";
-            for (var param : params()) {
-                ret += param.toDescriptor();
-            }
-            ret += ">";
-        }
         ret += ";";
         return ret;
     }
+
+    static String signatureParameters(List<TargetType> params) {
+        var ret = "";
+        if (!params.isEmpty()) {
+            ret += "<";
+            for (var param : params) {
+                ret += param.toSignature();
+            }
+            ret += ">";
+        }
+        return ret;
+    }
+
+    @Override
+    default String toDescriptor() {
+        return "L" + getInternalName() + ";";
+    }
 }

src/main/java/de/dhbwstuttgart/target/tree/type/TargetSuperWildcard.java

@@ -3,12 +3,12 @@ package de.dhbwstuttgart.target.tree.type;
 public record TargetSuperWildcard(TargetType innerType) implements TargetType {
     @Override
     public String toSignature() {
-        return innerType.toSignature();
+        return "-" + innerType.toSignature();
     }
 
     @Override
     public String toDescriptor() {
-        return "-" + innerType.toDescriptor();
+        return innerType.toDescriptor();
     }
 
     @Override

src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPE.java

@@ -1,6 +1,7 @@
 package de.dhbwstuttgart.typeinference.typeAlgo;
 
 import de.dhbwstuttgart.exceptions.DebugException;
+import de.dhbwstuttgart.parser.NullToken;
 import de.dhbwstuttgart.parser.SourceLoc;
 import de.dhbwstuttgart.parser.antlr.Java17Parser;
 import de.dhbwstuttgart.parser.scope.JavaClassName;
@@ -9,15 +10,18 @@ import de.dhbwstuttgart.syntaxtree.factory.ASTFactory;
 import de.dhbwstuttgart.syntaxtree.statement.Statement;
 import de.dhbwstuttgart.syntaxtree.type.RefType;
 import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
+import de.dhbwstuttgart.target.tree.type.TargetRefType;
 import de.dhbwstuttgart.typeinference.assumptions.FieldAssumption;
 import de.dhbwstuttgart.typeinference.assumptions.TypeInferenceBlockInformation;
 import de.dhbwstuttgart.typeinference.assumptions.TypeInferenceInformation;
+import de.dhbwstuttgart.typeinference.constraints.Constraint;
 import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
 import de.dhbwstuttgart.typeinference.constraints.Pair;
 import de.dhbwstuttgart.typeinference.unify.model.PairOperator;
 import de.dhbwstuttgart.util.BiRelation;
 import org.antlr.v4.runtime.Token;
 
+import java.lang.reflect.Modifier;
 import java.util.*;
 
 public class TYPE {
@@ -87,12 +91,25 @@ public class TYPE {
         TypeInferenceBlockInformation blockInfo = new TypeInferenceBlockInformation(info.getAvailableClasses(), currentClass, m);
         TYPEStmt methodScope = new TYPEStmt(blockInfo);
         ConstraintSet constraintSet = new ConstraintSet();
-        m.getParameterList().getFormalparalist().forEach(el -> {
-            if(el instanceof RecordPattern){
-                constraintSet.addAll(addRecursiveParameterConstraints((RecordPattern) el, blockInfo));
 
+        if (m.name.equals("main") && Modifier.isStatic(m.modifier) && m.getParameterList().getFormalparalist().size() == 1) {
+            // Add constraint for main method
+            var firstParam = m.getParameterList().getParameterAt(0);
+
+            constraintSet.addUndConstraint(new Pair(firstParam.getType(),
+                new RefType(new JavaClassName("java.util.List"),
+                    List.of(new RefType(new JavaClassName("java.lang.String"), new NullToken())),
+                    new NullToken()),
+                PairOperator.EQUALSDOT));
+        } else {
+            m.getParameterList().getFormalparalist().forEach(el -> {
+                if (el instanceof RecordPattern rp){
+                    constraintSet.addAll(addRecursiveParameterConstraints(rp, blockInfo));
                 }
             });
+        }
+
+
         m.block.accept(methodScope);
         constraintSet.addAll(methodScope.getConstraints());
         return constraintSet;

src/test/java/TestComplete.java

@@ -1196,6 +1196,15 @@ public class TestComplete {
         assertEquals(20, m.invoke(instance));
     }
 
+    @Test
+    public void testMain() throws Exception {
+        var classFiles = generateClassFiles(createClassLoader(), "Main.jav");
+        var clazz = classFiles.get("Main");
+        var m = clazz.getDeclaredMethod("main", List.class);
+        m.setAccessible(true);
+        m.invoke(null, List.of("foo", "bar", "baz"));
+    }
+
     @Test
     public void testBug122() throws Exception {
         var classFiles = generateClassFiles(createClassLoader(), "Bug122.jav");
@@ -1459,4 +1468,29 @@ public class TestComplete {
         var m = clazz.getDeclaredMethod("test");
         assertEquals(true, m.invoke(null));
     }
+
+    @Test
+    public void testBug373() throws Exception {
+        var classFiles = generateClassFiles(createClassLoader(), "Bug373.jav");
+        var clazz = classFiles.get("Bug373");
+        var m = clazz.getDeclaredMethod("main");
+        m.invoke(null);
+    }
+
+    @Disabled("Doesn't work yet")
+    @Test
+    public void testBug378() throws Exception {
+        var classFiles = generateClassFiles(createClassLoader(), "Bug378Main.jav");
+        var clazz = classFiles.get("Bug378Main");
+        var main = clazz.getDeclaredMethod("main", List.class);
+        main.setAccessible(true);
+        main.invoke(null, List.of());
+    }
+
+    @Test
+    public void testBug379() throws Exception {
+        var classFiles = generateClassFiles(createClassLoader(), "Bug379.jav");
+        var clazz = classFiles.get("Bug379");
+        clazz.getDeclaredConstructor().newInstance();
+    }
 }

src/test/java/targetast/TestCodegen.java

@@ -66,7 +66,7 @@ public class TestCodegen {
 
             converter.generateFunNTypes();
 
-            for (var entry : converter.auxiliaries.entrySet()) {
+            for (var entry : compiler.auxiliaries.entrySet()) {
                 writeClassFile(entry.getKey(), entry.getValue());
             }
         }
@@ -112,7 +112,7 @@ public class TestCodegen {
 
         converter.generateFunNTypes();
 
-        for (var entry : converter.auxiliaries.entrySet()) {
+        for (var entry : compiler.auxiliaries.entrySet()) {
             writeClassFile(entry.getKey(), entry.getValue());
         }