src/main/java/CompilerInput.txt

@@ -1,6 +1,6 @@
 public class Example {
 
-    public int test;
+    public int Example;
 
     public Example(int conInput) {
 
@@ -8,7 +8,9 @@ public class Example {
 
     public static int test(char b){
 
-        test = 3;
+        char Example;
+        boolean Example;
+        int c;
 
     }
 

src/main/java/ast/IdentifierNode.java

@@ -1,6 +1,6 @@
 package ast;
 
-public class IdentifierNode {
+public class IdentifierNode extends ASTNode{
 
     private String name;
 

src/main/java/ast/LiteralNode.java

@@ -0,0 +1,13 @@
+package ast;
+
+import ast.expression.ExpressionNode;
+
+public class LiteralNode extends ExpressionNode {
+
+  int value;
+
+  public LiteralNode(int value) {
+    this.value = value;
+  }
+
+}

src/main/java/ast/statement/AssignmentStatementNode.java

@@ -1,13 +1,14 @@
 package ast.statement;
 
+import ast.IdentifierNode;
 import ast.expression.ExpressionNode;
 
 public class AssignmentStatementNode extends StatementNode {
-  public String identifier;
+  public IdentifierNode identifier;
   public ExpressionNode expression;
 
   public AssignmentStatementNode(String identifier, ExpressionNode expression) {
-    this.identifier = identifier;
+    this.identifier = new IdentifierNode(identifier);
     this.expression = expression;
   }
 }

src/main/java/ast/statement/VariableDeclarationStatementNode.java

@@ -1,15 +1,16 @@
 package ast.statement;
 
+import ast.IdentifierNode;
 import ast.type.TypeNode;
 import ast.expression.ExpressionNode;
 
 public class VariableDeclarationStatementNode extends StatementNode {
     public TypeNode type;
-    public String identifier;
+    public IdentifierNode identifier;
     public ExpressionNode expression;
     public VariableDeclarationStatementNode(TypeNode type, String identifier, ExpressionNode expression) {
         this.type = type;
-        this.identifier = identifier;
+        this.identifier = new IdentifierNode(identifier);
         this.expression = expression;
     }
 }

src/main/java/parser/ASTBuilder.java

@@ -21,6 +21,7 @@ import parser.generated.SimpleJavaParser;
 
 import java.util.ArrayList;
 import java.util.List;
+import parser.generated.SimpleJavaParser.LiteralContext;
 
 public class ASTBuilder extends SimpleJavaBaseVisitor<ASTNode> {
     @Override
@@ -196,4 +197,16 @@ public class ASTBuilder extends SimpleJavaBaseVisitor<ASTNode> {
 
         return null;  // Return null or throw an exception if no valid expression found
     }
+
+    @Override
+    public ASTNode visitLiteral(SimpleJavaParser.LiteralContext ctx) {
+        LiteralContext literalContext = (LiteralContext) ctx;
+        try {
+            int intValue = Integer.parseInt(literalContext.getText());
+            return new LiteralNode(intValue);
+        } catch (NumberFormatException ignored) {}
+
+        return null;  // Return null or throw an exception if no valid expression found
+    }
+
 }

src/main/java/semantic/SemanticAnalyzer.java

@@ -2,57 +2,50 @@ package semantic;
 
 
 import ast.*;
+import ast.expression.ExpressionNode;
 import ast.member.ConstructorNode;
 import ast.member.FieldNode;
 import ast.member.MemberNode;
 
+import ast.member.MethodNode;
+import ast.statement.AssignmentStatementNode;
+import ast.statement.StatementNode;
 import java.util.ArrayList;
 import java.util.List;
 
 public class SemanticAnalyzer {
 
-  public void analyze(ASTNode node) {
+  public String analyze(ASTNode node) {
       if (node == null) {
-          return;
+          return null;
       }
 
     if (node instanceof ClassNode) {
-
       ClassNode classNode = (ClassNode) node;
-      if (classNode.identifier == null) {
-        System.out.println("Klasse besitzt keinen Identifier");
-      }
 
       List<MemberNode> memberNodes = classNode.members;
       for (MemberNode member : memberNodes) {
         analyze(member);
       }
 
-    } else if (node instanceof AssignmentNode) {
+    } else if (node instanceof AssignmentStatementNode) {
-      AssignmentNode assignmentNode = (AssignmentNode) node;
+      AssignmentStatementNode assignmentStatementNode = (AssignmentStatementNode) node;
-      System.out.println("Assignment ");
 
-      
+      IdentifierNode identifierNode = assignmentStatementNode.identifier;
 
-      analyze(assignmentNode.expression);
+      if(analyze(assignmentStatementNode.expression).equals("int")){
+        System.out.println("INTEGER");
+      }
 
+    } else if (node instanceof LiteralNode) {
+      return "int";
     } else if (node instanceof MethodNode) {
       MethodNode methodNode = (MethodNode) node;
-      System.out.println("Methode: " + methodNode.identifier.getName());
       List<StatementNode> statementNodes = methodNode.statements;
       for (StatementNode statement : statementNodes) {
         analyze(statement);
       }
 
-    } else if (node instanceof ExpressionNode) {
-      ExpressionNode expressionNode = (ExpressionNode) node;
-      System.out.println("Klasse besitzt keinen Expression " + expressionNode.value);
-
-    } else if (node instanceof FieldNode) {
-
-      FieldNode fieldNode = (FieldNode) node;
-
-
     } else if (node instanceof ProgramNode) {
       ProgramNode programNode = (ProgramNode) node;
       List<ClassNode> classes = programNode.classes;
@@ -61,6 +54,7 @@ public class SemanticAnalyzer {
       }
     }
 
+    return null;
   }
 
 }