Structure

src/main/java/Example.java

@@ -0,0 +1,3 @@
+public class Example {
+}
+

src/main/java/Main.java

@@ -1,10 +1,11 @@
-package parser;
-
 import bytecode.ByteCodeGenerator;
 import org.antlr.v4.runtime.CharStream;
 import org.antlr.v4.runtime.CharStreams;
 import org.antlr.v4.runtime.CommonTokenStream;
 import org.antlr.v4.runtime.tree.ParseTree;
+import parser.ASTBuilder;
+import parser.ClassDeclarationNode;
+import parser.ProgramNode;
 import parser.generated.SimpleJavaLexer;
 import parser.generated.SimpleJavaParser;
 
@@ -15,7 +16,7 @@ public class Main {
     public static void main(String[] args) throws Exception {
         CharStream codeCharStream = null;
         try {
-            codeCharStream = CharStreams.fromPath(Paths.get("path/to/your/file.txt"));
+            codeCharStream = CharStreams.fromPath(Paths.get("src/main/java/Example.java"));
             parsefile(codeCharStream);
         } catch (IOException e) {
             System.err.println("Error reading the file: " + e.getMessage());

src/main/java/parser/Test.txt

@@ -1 +0,0 @@
-class Test { }

src/main/test/java/SimpleJavaFeatureTest.java

@@ -9,6 +9,11 @@ public class SimpleJavaFeatureTest {
         this.b = b;
         this.c = c;
     }
+    private class InnerClass {
+        void innerMethod() {
+            System.out.println("Inner class method");
+        }
+    }
 
     // Methode zur Demonstration von Kontrollstrukturen
     void controlStructures() {