diff --git a/src/main/java/de/dhbwstuttgart/intermediate/generation/FunN.java b/src/main/java/de/dhbwstuttgart/intermediate/generation/FunN.java
index 0312de3a..1d60f46a 100644
--- a/src/main/java/de/dhbwstuttgart/intermediate/generation/FunN.java
+++ b/src/main/java/de/dhbwstuttgart/intermediate/generation/FunN.java
@@ -1,6 +1,7 @@
 package de.dhbwstuttgart.intermediate.generation;
 
 import de.dhbwstuttgart.intermediate.types.IntermediateGenericType;
+import de.dhbwstuttgart.intermediate.types.IntermediateInnerType;
 import de.dhbwstuttgart.intermediate.types.IntermediateRefType;
 import de.dhbwstuttgart.intermediate.types.IntermediateType;
 import de.dhbwstuttgart.parser.scope.JavaClassName;
@@ -24,10 +25,18 @@ import static org.objectweb.asm.Opcodes.*;
  */
 public final class FunN extends IntermediateRefType {
 
-    private final String superFunNName;
     private final String argumentGenericBase = "T";
     private final String returnGeneric = "R";
     private final String methodName = "apply";
+    private final int bytecodeVersion = V1_8;
+
+    private final String objectSuperType = Type.getInternalName(Object.class).replace('.','/');
+    private final String objectSignature = new IntermediateRefType(new JavaClassName(Type.getInternalName(Object.class))).getSignature();
+
+    /**
+     * Represents the super interface of this specialized function.
+     */
+    private final IntermediateRefType superFunN;
 
     /**
      * Caches the superBytecode after first computation.
@@ -39,9 +48,10 @@ public final class FunN extends IntermediateRefType {
      */
     private byte[] bytecode;
 
-    public FunN(IntermediateType returnType){ this(Collections.emptyList(), returnType); }
+    public FunN(IntermediateInnerType returnType){ this(Collections.emptyList(), returnType); }
 
-    public FunN(List<IntermediateType> typArguments, IntermediateType returnType) {
+    public FunN(List<IntermediateInnerType> typArguments, IntermediateInnerType returnType) {
+        //using stream-API for single line processing of relevant data in the super()-call
         super(new JavaClassName(
                 String.format("Fun%d$$%s%s",
                         typArguments.size(),
@@ -53,7 +63,8 @@ public final class FunN extends IntermediateRefType {
                         .replace('/', '$')
                         .replace(";", "$_$")),
                 Stream.concat(typArguments.stream(), Stream.of(returnType)).collect(Collectors.toList()));
-        superFunNName = String.format("Fun%d$$", typArguments.size());
+        superFunN = new IntermediateRefType(new JavaClassName(String.format("Fun%d$$", typArguments.size())),
+                Stream.concat(typArguments.stream(), Stream.of(returnType)).collect(Collectors.toList()));
     }
 
     /**
@@ -62,9 +73,6 @@ public final class FunN extends IntermediateRefType {
     public byte[] getSuperBytecode(){
         byte[] superBytecode = this.superBytecode;
         if (superBytecode == null){
-            String superType = Type.getInternalName(Object.class).replace('.','/');
-            String objectSignature = new IntermediateRefType(new JavaClassName(Type.getInternalName(Object.class))).getSignature();
-
             String superFunNClassSignature = "<";
             String superFunNMethodSignature = "(";
             String superFunNMethodDescriptor = "(";
@@ -81,7 +89,7 @@ public final class FunN extends IntermediateRefType {
 
             ClassWriter classWriter = new ClassWriter(0);
             MethodVisitor methodVisitor;
-            classWriter.visit(V1_8, ACC_PUBLIC | ACC_ABSTRACT | ACC_INTERFACE, superFunNName, superFunNClassSignature, superType, null);
+            classWriter.visit(bytecodeVersion, ACC_PUBLIC | ACC_ABSTRACT | ACC_INTERFACE, superFunN.getClassName(), superFunNClassSignature, objectSuperType, null);
             methodVisitor = classWriter.visitMethod(ACC_PUBLIC | ACC_ABSTRACT, methodName, superFunNMethodDescriptor, superFunNMethodSignature , null);
             methodVisitor.visitEnd();
             classWriter.visitEnd();
@@ -99,7 +107,26 @@ public final class FunN extends IntermediateRefType {
     public byte[] getBytecode(){
         byte[] bytecode = this.bytecode;
         if (bytecode == null){
-            //ToDo
+            String funNClassSignature = objectSignature + superFunN.getSignature();
+            boolean containsGeneric = false;
+
+            String genericSignature = "<";
+            for (int currentTypArgumentIndex = 0; currentTypArgumentIndex < getTypArgumentSize(); currentTypArgumentIndex++) {
+                IntermediateType typArgument = getTypArgument(currentTypArgumentIndex);
+                if (typArgument == null) continue;
+                if (typArgument instanceof IntermediateGenericType){
+                    IntermediateGenericType generic = (IntermediateGenericType) typArgument;
+                    genericSignature += String.format("%s:%s", generic.getGenericName(), generic.getDescriptor());
+                    containsGeneric = true;
+                }
+            }
+            genericSignature += ">";
+            if (containsGeneric) funNClassSignature = genericSignature + funNClassSignature;
+
+            ClassWriter classWriter = new ClassWriter(0);
+            classWriter.visit(bytecodeVersion, ACC_PUBLIC | ACC_ABSTRACT | ACC_INTERFACE, getClassName(), funNClassSignature, objectSuperType, new String[]{superFunN.getClassName()});
+            classWriter.visitEnd();
+            bytecode = classWriter.toByteArray();
             this.bytecode = bytecode;
         }
         return bytecode;
diff --git a/src/test/java/intermediate/generation/FunNTest.java b/src/test/java/intermediate/generation/FunNTest.java
index dba3f2a6..d94595cd 100644
--- a/src/test/java/intermediate/generation/FunNTest.java
+++ b/src/test/java/intermediate/generation/FunNTest.java
@@ -26,8 +26,6 @@ public class FunNTest {
 
     private static FunN fun2IntIntString;
 
-    //ToDo mehr Tests und Bytecode Tests
-
     @BeforeClass
     public static void SetUp(){
         IntermediateRefType integer = new IntermediateRefType(new JavaClassName(Type.getInternalName(Integer.class)));
@@ -51,12 +49,21 @@ public class FunNTest {
     @Test
     public void BytecodeTest_Super0(){ assertArrayEquals(generatedASMFun0(), fun0T.getSuperBytecode()) ;}
 
+    @Test
+    public void BytecodeTest_Fun0T(){ assertArrayEquals(generatedASMFun0T(), fun0T.getBytecode()) ;}
+
     @Test
     public void BytecodeTest_Super1(){ assertArrayEquals(generatedASMFun1(), fun1IntInt.getSuperBytecode()) ;}
 
+    @Test
+    public void BytecodeTest_Fun1IntInt(){ assertArrayEquals(generatedASMFun1IntInt(), fun1IntInt.getBytecode()) ;}
+
     @Test
     public void BytecodeTest_Super2(){ assertArrayEquals(generatedASMFun2(), fun2IntIntString.getSuperBytecode()) ;}
 
+    @Test
+    public void BytecodeTest_Fun2IntIntString(){ assertArrayEquals(generatedASMFun2IntIntString(), fun2IntIntString.getBytecode()) ;}
+
     private byte[] generatedASMFun0() {
         ClassWriter classWriter = new ClassWriter(0);
         MethodVisitor methodVisitor;
@@ -67,6 +74,13 @@ public class FunNTest {
         return classWriter.toByteArray();
     }
 
+    private byte[] generatedASMFun0T() {
+        ClassWriter classWriter = new ClassWriter(0);
+        classWriter.visit(V1_8, ACC_PUBLIC | ACC_ABSTRACT | ACC_INTERFACE, "Fun0$$TT$_$", "<T:Ljava/lang/Object;>Ljava/lang/Object;LFun0$$<TT;>;", "java/lang/Object", new String[]{"Fun0$$"});
+        classWriter.visitEnd();
+        return classWriter.toByteArray();
+    }
+
     private byte[] generatedASMFun1() {
         ClassWriter classWriter = new ClassWriter(0);
         MethodVisitor methodVisitor;
@@ -77,6 +91,13 @@ public class FunNTest {
         return classWriter.toByteArray();
     }
 
+    private byte[] generatedASMFun1IntInt() {
+        ClassWriter classWriter = new ClassWriter(0);
+        classWriter.visit(V1_8, ACC_PUBLIC | ACC_ABSTRACT | ACC_INTERFACE, "Fun1$$Ljava$lang$Integer$_$Ljava$lang$Integer$_$", "Ljava/lang/Object;LFun1$$<Ljava/lang/Integer;Ljava/lang/Integer;>;", "java/lang/Object", new String[]{"Fun1$$"});
+        classWriter.visitEnd();
+        return classWriter.toByteArray();
+    }
+
     private byte[] generatedASMFun2() {
         ClassWriter classWriter = new ClassWriter(0);
         MethodVisitor methodVisitor;
@@ -86,4 +107,11 @@ public class FunNTest {
         classWriter.visitEnd();
         return classWriter.toByteArray();
     }
+
+    private byte[] generatedASMFun2IntIntString() {
+        ClassWriter classWriter = new ClassWriter(0);
+        classWriter.visit(V1_8, ACC_PUBLIC | ACC_ABSTRACT | ACC_INTERFACE, "Fun2$$Ljava$lang$Integer$_$Ljava$lang$Integer$_$Ljava$lang$String$_$", "Ljava/lang/Object;LFun2$$<Ljava/lang/Integer;Ljava/lang/Integer;Ljava/lang/String;>;", "java/lang/Object", new String[]{"Fun2$$"});
+        classWriter.visitEnd();
+        return classWriter.toByteArray();
+    }
 }