diff --git a/README.md b/README.md
index 01a7a0d..bb2f07e 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@
 - Laura Schleicher: Grammatik entwickeln, Records, Statements als Liste zurückgeben, Generator, Syntactic Sugar auflösen
 - Julian Kraus: Grammatik entwickeln, Generator, Syntactic Sugar auflösen, Parser Exceptions sammeln
 - Ahmad Juha: Typcheck
-- Simon Wittmann: Codegen und Tool für ASM
+- Simon Wittmann: Codegen, Logging, CommandLine Nutzung
 - Jonathan Fleischmann:
   - Schreiben von Tests, die die einzelnen Features abdecken
   - Umwandlung der Testfiles in AST und TypedAST
diff --git a/src/main/java/de/maishai/Compiler.java b/src/main/java/de/maishai/Compiler.java
index 092cbff..ec54be2 100644
--- a/src/main/java/de/maishai/Compiler.java
+++ b/src/main/java/de/maishai/Compiler.java
@@ -5,6 +5,7 @@ import de.maishai.antlr.DecafParser;
 import de.maishai.ast.records.Class;
 import de.maishai.ast.records.Program;
 import de.maishai.typedast.CodeGenUtils;
+import de.maishai.typedast.MethodContext;
 import de.maishai.typedast.typedclass.TypedClass;
 import de.maishai.typedast.typedclass.TypedProgram;
 import org.antlr.v4.runtime.*;
@@ -13,6 +14,8 @@ import org.apache.commons.cli.*;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.logging.Formatter;
+import java.util.logging.Handler;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -21,11 +24,11 @@ public class Compiler {
     private static final String JAVA_FILE_EXTENSION = ".java";
     private static final Logger LOGGER = Logger.getLogger(Compiler.class.getName());
 
-    public static Program generateAST(List<String> fromSources) {
+    public static Program generateAST(List<String> sourcePaths) {
         List<Class> classes = new ArrayList<>();
         CollectingErrorListener errorListener = new CollectingErrorListener();
-        for (String fromSource : fromSources) {
-            CharStream input = CharStreams.fromString(fromSource);
+        for (String sourcePath : sourcePaths) {
+            CharStream input = CharStreams.fromString(sourcePath);
 
             DecafLexer lexer = new DecafLexer(input);
             //add custom error listener
@@ -109,7 +112,12 @@ public class Compiler {
             Logger rootLog = Logger.getLogger("");
             rootLog.setLevel( Level.FINEST );
             rootLog.getHandlers()[0].setLevel( Level.FINEST );
-            LOGGER.finest("Debug logging enabled");
+            Formatter logFormatter = new LogFormatter();
+            for (Handler handler : rootLog.getHandlers()) {
+                handler.setFormatter(logFormatter);
+            }
+            MethodContext.DEBUG = true;
+            LOGGER.info("Debug logging enabled");
         }
 
         if (cmd.getArgs().length == 0) {
diff --git a/src/main/java/de/maishai/LogFormatter.java b/src/main/java/de/maishai/LogFormatter.java
new file mode 100644
index 0000000..1dd4dc1
--- /dev/null
+++ b/src/main/java/de/maishai/LogFormatter.java
@@ -0,0 +1,18 @@
+package de.maishai;
+
+import java.text.MessageFormat;
+import java.util.logging.Formatter;
+import java.util.logging.Level;
+import java.util.logging.LogRecord;
+
+public class LogFormatter extends Formatter {
+    @Override
+    public String format(LogRecord logRecord) {
+        String formattedMessage = MessageFormat.format(logRecord.getMessage(), logRecord.getParameters());
+
+        if (logRecord.getLevel() == Level.FINEST) {
+            return formattedMessage + "\n";
+        }
+        return logRecord.getLevel() + ": " + formattedMessage + "\n";
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/de/maishai/typedast/LoggingMethodVisitor.java b/src/main/java/de/maishai/typedast/LoggingMethodVisitor.java
index 7d7870a..baa386e 100644
--- a/src/main/java/de/maishai/typedast/LoggingMethodVisitor.java
+++ b/src/main/java/de/maishai/typedast/LoggingMethodVisitor.java
@@ -6,14 +6,16 @@ import org.objectweb.asm.Opcodes;
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 public class LoggingMethodVisitor extends MethodVisitor {
+    private static final Logger LOGGER = Logger.getLogger(LoggingMethodVisitor.class.getName());
     private final Map<Label, String> labelNames = new HashMap<>();
     private int labelCounter = 0;
 
     public LoggingMethodVisitor(MethodVisitor methodVisitor) {
         super(Opcodes.ASM9, methodVisitor);
-        System.out.println("\n---  Visiting Method  ---");
     }
 
     private String getLabelName(Label label) {
@@ -22,7 +24,7 @@ public class LoggingMethodVisitor extends MethodVisitor {
 
     @Override
     public void visitJumpInsn(int opcode, Label label) {
-        System.out.println("visitJumpInsn: " + opcodeToString(opcode) + ", " + getLabelName(label));
+        LOGGER.log(Level.FINEST, "visitJumpInsn: {0}, {1}", new Object[]{opcodeToString(opcode), getLabelName(label)});
         super.visitJumpInsn(opcode, label);
     }
 
@@ -41,63 +43,63 @@ public class LoggingMethodVisitor extends MethodVisitor {
 
     @Override
     public void visitMethodInsn(int opcode, String owner, String name, String descriptor, boolean isInterface) {
-        System.out.println("visitMethodInsn: " + opcodeToString(opcode) + ", " + owner + ", " + name + ", " + descriptor + ", " + isInterface);
+        LOGGER.log(Level.FINEST, "visitMethodInsn: {0}, {1}, {2}, {3}, {4}", new Object[]{opcodeToString(opcode), owner, name, descriptor, isInterface});
         super.visitMethodInsn(opcode, owner, name, descriptor, isInterface);
     }
 
     @Override
     public void visitVarInsn(int opcode, int varIndex) {
-        System.out.println("visitVarInsn: " + opcodeToString(opcode) + ", " + varIndex);
+        LOGGER.log(Level.FINEST, "visitVarInsn: {0}, {1}", new Object[]{opcodeToString(opcode), varIndex});
         super.visitVarInsn(opcode, varIndex);
     }
 
     @Override
     public void visitTypeInsn(int opcode, String type) {
-        System.out.println("visitTypeInsn: " + opcodeToString(opcode) + ", " + type);
+        LOGGER.log(Level.FINEST, "visitTypeInsn: {0}, {1}", new Object[]{opcodeToString(opcode), type});
         super.visitTypeInsn(opcode, type);
     }
 
     @Override
     public void visitInsn(int opcode) {
-        System.out.println("visitInsn: " + opcodeToString(opcode));
+        LOGGER.log(Level.FINEST, "visitInsn: {0}", opcodeToString(opcode));
         super.visitInsn(opcode);
     }
 
     @Override
     public void visitMethodInsn(int opcode, String owner, String name, String descriptor) {
-        System.out.println("visitMethodInsn: " + opcodeToString(opcode) + ", " + owner + ", " + name + ", " + descriptor);
+        LOGGER.log(Level.FINEST, "visitMethodInsn: {0}, {1}, {2}, {3}", new Object[]{opcodeToString(opcode), owner, name, descriptor});
         super.visitMethodInsn(opcode, owner, name, descriptor);
     }
 
     @Override
     public void visitFieldInsn(int opcode, String owner, String name, String descriptor) {
-        System.out.println("visitFieldInsn: " + opcodeToString(opcode) + ", " + owner + ", " + name + ", " + descriptor);
+        LOGGER.log(Level.FINEST, "visitFieldInsn: {0}, {1}, {2}, {3}", new Object[]{opcodeToString(opcode), owner, name, descriptor});
         super.visitFieldInsn(opcode, owner, name, descriptor);
     }
 
     @Override
     public void visitMaxs(int maxStack, int maxLocals) {
-        System.out.println("visitMaxs: " + maxStack + ", " + maxLocals);
+        LOGGER.log(Level.FINEST, "visitMaxs: {0}, {1}", new Object[]{maxStack, maxLocals});
         super.visitMaxs(maxStack, maxLocals);
     }
 
     @Override
     public void visitIntInsn(int opcode, int operand) {
         String opcodeString = opcode == Opcodes.BIPUSH ? "BIPUSH" : "SIPUSH";
-        System.out.println("visitIntInsn: " + opcodeString + ", " + operand);
+        LOGGER.log(Level.FINEST, "visitIntInsn: {0}, {1}", new Object[]{opcodeString, operand});
         super.visitIntInsn(opcode, operand);
     }
 
     @Override
     public void visitLabel(Label label) {
         String labelName = getLabelName(label);
-        System.out.println("visitLabel: " + labelName);
+        LOGGER.log(Level.FINEST, "visitLabel: {0}", labelName);
         super.visitLabel(label);
     }
 
     @Override
     public void visitLdcInsn(Object value) {
-        System.out.println("visitLdcInsn: " + value);
+        LOGGER.log(Level.FINEST, "visitLdcInsn: {0}", value);
         super.visitLdcInsn(value);
     }
 }
diff --git a/src/main/java/de/maishai/typedast/MethodContext.java b/src/main/java/de/maishai/typedast/MethodContext.java
index 3d31096..8f1cd12 100644
--- a/src/main/java/de/maishai/typedast/MethodContext.java
+++ b/src/main/java/de/maishai/typedast/MethodContext.java
@@ -12,6 +12,7 @@ import java.util.logging.Logger;
 @Getter
 public class MethodContext {
     private static final Logger LOGGER = Logger.getLogger(MethodContext.class.getName());
+    public static boolean DEBUG = false;
     public record LocalVariable(String name, int index, Type type) {
     }
 
@@ -28,7 +29,7 @@ public class MethodContext {
     private final Deque<Label> continueLabels = new ArrayDeque<>();
 
     public MethodContext(ClassContext classContext, MethodVisitor mv, Type returnType) {
-        if (Objects.equals(System.getenv("DEBUG"), "true")) {
+        if (DEBUG) {
             this.mv = new LoggingMethodVisitor(mv);
         } else {
             this.mv = mv;
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedAssignment.java b/src/main/java/de/maishai/typedast/typedclass/TypedAssignment.java
index aa7ae10..18ed031 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedAssignment.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedAssignment.java
@@ -10,7 +10,6 @@ import lombok.Data;
 import org.objectweb.asm.Opcodes;
 
 import java.util.Optional;
-import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import static de.maishai.typedast.Util.TypedExpressionUtil.convertExpression;
@@ -107,7 +106,6 @@ public class TypedAssignment implements TypedStatement {
                 receiver = location.getRecursiveOwnerChain().getType().getReference();
             }
             ctx.getMv().visitFieldInsn(Opcodes.PUTFIELD, receiver, location.getName(), value.getType().getDescriptor());
-            LOGGER.log(Level.FINEST, "PUTFIELD: {0} {1} {2}", new Object[]{receiver, location.getName(), value.getType().getDescriptor()});
             ctx.popStack();
         } else {
             Optional<MethodContext.LocalVariable> localVariableOptional = ctx.getLocalVar(location.getName());
@@ -117,10 +115,8 @@ public class TypedAssignment implements TypedStatement {
             }
             MethodContext.LocalVariable localVariable = localVariableOptional.get();
             if (value.getType().getKind() == Type.Kind.REFERENCE) {
-                LOGGER.finest("ASTORE " + localVariable.index());
                 ctx.getMv().visitVarInsn(Opcodes.ASTORE, localVariable.index());
             } else {
-                LOGGER.finest("ISTORE " + localVariable.index());
                 ctx.getMv().visitVarInsn(Opcodes.ISTORE, localVariable.index());
             }
         }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedConstructor.java b/src/main/java/de/maishai/typedast/typedclass/TypedConstructor.java
index f081087..f7e4d43 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedConstructor.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedConstructor.java
@@ -108,7 +108,6 @@ public class TypedConstructor implements TypedNode {
         //super();
         mctx.pushStack("this");
         mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", CONSTRUCTOR_METHOD_NAME, "()V", false);
-        LOGGER.finest("INVOKESPECIAL: " + "java/lang/Object" + " " + CONSTRUCTOR_METHOD_NAME + " " + "()V");
         mctx.popStack();
 
         typedBlock.codeGen(mctx);
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedFieldVarAccess.java b/src/main/java/de/maishai/typedast/typedclass/TypedFieldVarAccess.java
index 4ed5347..982565e 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedFieldVarAccess.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedFieldVarAccess.java
@@ -163,13 +163,11 @@ public class TypedFieldVarAccess implements TypedExpression {
             int loadOpcode = type.getKind() == Type.Kind.REFERENCE ? Opcodes.ALOAD : Opcodes.ILOAD;
             Optional<MethodContext.LocalVariable> localVariableOptional = ctx.getLocalVar(name);
             if (localVariableOptional.isEmpty()) {
-                LOGGER.log(Level.FINEST, "Variable {0} not declared", name);
+                LOGGER.log(Level.SEVERE, "Variable {0} not declared", name);
                 return;
             }
             MethodContext.LocalVariable localVariable = localVariableOptional.get();
             ctx.getMv().visitVarInsn(loadOpcode, localVariable.index());
-            String opcode = loadOpcode == Opcodes.ALOAD ? "ALOAD " : "ILOAD ";
-            LOGGER.log(Level.FINEST, "{0} {1}", new Object[]{opcode, localVariable.index()});
         }
         ctx.pushAnonToStack();
     }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedIntLiteral.java b/src/main/java/de/maishai/typedast/typedclass/TypedIntLiteral.java
index 8f5942b..c561397 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedIntLiteral.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedIntLiteral.java
@@ -9,14 +9,10 @@ import lombok.Data;
 import lombok.RequiredArgsConstructor;
 import org.objectweb.asm.Opcodes;
 
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
 @Data
 @AllArgsConstructor
 @RequiredArgsConstructor
 public class TypedIntLiteral implements TypedExpression {
-    private static final Logger LOGGER = Logger.getLogger(TypedIntLiteral.class.getName());
     private Integer value;
     private Type type;
 
@@ -43,13 +39,10 @@ public class TypedIntLiteral implements TypedExpression {
     public void codeGen(MethodContext ctx) {
         if (value >= Byte.MIN_VALUE && value <= Byte.MAX_VALUE) {
             ctx.getMv().visitIntInsn(Opcodes.BIPUSH, value);
-            LOGGER.log(Level.FINEST, "BIPUSH {0}", value);
         } else if (value >= Short.MIN_VALUE && value <= Short.MAX_VALUE) {
             ctx.getMv().visitIntInsn(Opcodes.SIPUSH, value);
-            LOGGER.log(Level.FINEST, "SIPUSH {0}", value);
         } else {
             ctx.getMv().visitLdcInsn(value);
-            LOGGER.log(Level.FINEST, "LDC {0}", value);
         }
         ctx.pushInstantToStack();
     }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedMethodCall.java b/src/main/java/de/maishai/typedast/typedclass/TypedMethodCall.java
index 8efbd42..cf893ad 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedMethodCall.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedMethodCall.java
@@ -11,8 +11,6 @@ import org.objectweb.asm.Opcodes;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
 import static de.maishai.typedast.Util.TypedExpressionUtil.convertExpression;
 
@@ -21,7 +19,6 @@ import static de.maishai.typedast.Util.TypedExpressionUtil.convertExpression;
 @NoArgsConstructor
 @AllArgsConstructor
 public class TypedMethodCall implements TypedExpression, TypedStatement {
-    private static final Logger LOGGER = Logger.getLogger(TypedMethodCall.class.getName());
     private TypedFieldVarAccess recipient;
     private List<TypedExpression> args = new ArrayList<>();
     private Type type;
@@ -107,7 +104,6 @@ public class TypedMethodCall implements TypedExpression, TypedStatement {
             methodOwnerClass = recipient.getRecursiveOwnerChain().getType().getReference();
         }
         ctx.getMv().visitMethodInsn(Opcodes.INVOKEVIRTUAL, methodOwnerClass, recipient.getName(), descriptor, false);
-        LOGGER.log(Level.FINEST, "INVOKEVIRTUAL {0} {1} {2}", new Object[]{methodOwnerClass, recipient.getName(), descriptor});
         ctx.popStack();
         for (int i = 0; i < args.size(); i++) {
             ctx.popStack();
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedNew.java b/src/main/java/de/maishai/typedast/typedclass/TypedNew.java
index 2caeeb9..0ef32e5 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedNew.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedNew.java
@@ -9,15 +9,12 @@ import org.objectweb.asm.Opcodes;
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
 import static de.maishai.typedast.Util.TypedExpressionUtil.convertExpression;
 
 @Data
 @AllArgsConstructor
 public class TypedNew implements TypedExpression, TypedStatement {
-    private static final Logger LOGGER = Logger.getLogger(TypedNew.class.getName());
     private Type type;
     private List<TypedExpression> args = new ArrayList<>();
 
@@ -68,10 +65,8 @@ public class TypedNew implements TypedExpression, TypedStatement {
     @Override
     public void codeGen(MethodContext ctx) {
         ctx.getMv().visitTypeInsn(Opcodes.NEW, type.getReference());
-        LOGGER.log(Level.FINEST, "NEW {0}", type.getReference());
         ctx.pushAnonToStack();
         ctx.getMv().visitInsn(Opcodes.DUP);
-        LOGGER.finest("DUP");
         ctx.pushAnonToStack();
         for (TypedExpression arg : args) {
             arg.codeGen(ctx);
@@ -79,7 +74,6 @@ public class TypedNew implements TypedExpression, TypedStatement {
         String descriptor = CodeGenUtils.generateDescriptor(args.stream().map(TypedExpression::getType).toList(), Type.VOID);
         ctx.getMv().visitMethodInsn(Opcodes.INVOKESPECIAL, type.getReference(), "<init>", descriptor, false);
         ctx.popStack();
-        LOGGER.log(Level.FINEST, "INVOKESPECIAL {0} <init> {1}", new Object[]{type.getReference(), descriptor});
         for (int i = 0; i < args.size(); i++) {
             ctx.popStack();
         }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedReturn.java b/src/main/java/de/maishai/typedast/typedclass/TypedReturn.java
index ea2b176..ef190f8 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedReturn.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedReturn.java
@@ -1,22 +1,22 @@
 package de.maishai.typedast.typedclass;
 
 
-import de.maishai.ast.records.*;
-import de.maishai.typedast.*;
+import de.maishai.ast.records.Return;
+import de.maishai.typedast.MethodContext;
+import de.maishai.typedast.Type;
+import de.maishai.typedast.TypedExpression;
+import de.maishai.typedast.TypedStatement;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 import org.objectweb.asm.Opcodes;
 
-import java.util.logging.Logger;
-
 import static de.maishai.typedast.Util.TypedExpressionUtil.convertExpression;
 
 @Data
 @NoArgsConstructor
 @AllArgsConstructor
 public class TypedReturn implements TypedStatement {
-    private static final Logger LOGGER = Logger.getLogger(TypedReturn.class.getName());
     private TypedExpression ret;
     private Type type;
 
@@ -56,15 +56,12 @@ public class TypedReturn implements TypedStatement {
     public void codeGen(MethodContext ctx) {
         if (ret == null) {
             ctx.getMv().visitInsn(Opcodes.RETURN);
-            LOGGER.finest("RETURN");
         } else {
             ret.codeGen(ctx);
             if (ret.getType().getKind() != Type.Kind.REFERENCE) {
                 ctx.getMv().visitInsn(Opcodes.IRETURN);
-                LOGGER.finest("IRETURN");
             } else {
                 ctx.getMv().visitInsn(Opcodes.ARETURN);
-                LOGGER.finest("ARETURN");
             }
         }