diff --git a/src/de/dhbwstuttgart/bytecode/signature/Signature.java b/src/de/dhbwstuttgart/bytecode/signature/Signature.java
index c32cbf86..ae91932a 100644
--- a/src/de/dhbwstuttgart/bytecode/signature/Signature.java
+++ b/src/de/dhbwstuttgart/bytecode/signature/Signature.java
@@ -20,6 +20,7 @@ import de.dhbwstuttgart.syntaxtree.type.GenericRefType;
 import de.dhbwstuttgart.syntaxtree.type.RefType;
 import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
 import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.syntaxtree.type.WildcardType;
 import de.dhbwstuttgart.typeinference.result.GenericInsertPair;
 import de.dhbwstuttgart.typeinference.result.ResolvedType;
 import de.dhbwstuttgart.typeinference.result.ResultSet;
@@ -104,10 +105,13 @@ public class Signature {
 		Iterator<? extends GenericTypeVar> itr = method.getGenerics().iterator();
 		// visits all formal type parameter and visits their bounds <T:...;B:...;...>
 		while(itr.hasNext()) {
+			System.out.println("HAS GENERICS!!");
 			GenericTypeVar g = itr.next();
 			getBoundsOfTypeVar(g,genericsAndBoundsMethod);
 		}
 		
+		//TODO: paramtrisierte Typen mit Generics, Type Variablen müssen definiert werden.
+		
 		// Wenn die RückgabeType eine TPH ist, wird als generic behandelt
 		// z.B: Type = TPH K => wird eine Formal Type Parameter K$ erzeugt und Bound = Object
 		if(!isConstructor) {
@@ -131,7 +135,9 @@ public class Signature {
 					if(hasTPHs(ref)) {
 						createSignatureForParameterizedType(ref);
 					}
-					
+					System.out.println("HAS WC = " + hasWC(ref));
+					if(hasWC(ref))
+						createSigForParamTypeWithWC(ref);
 				}
 			}
 		}
@@ -170,6 +176,10 @@ public class Signature {
 				RefType ref = (RefType) methodParamsAndTypes.get(paramName);
 				if(hasTPHs(ref))
 					createSignatureForParameterizedType(ref);
+				
+				System.out.println("HAS WC = " + hasWC(ref));
+				if(hasWC(ref))
+					createSigForParamTypeWithWC(ref);
 			}
 			
 			for(GenericInsertPair p:methodPairs) {
@@ -218,6 +228,34 @@ public class Signature {
 //		sw.visitEnd();
 	}
 	
+	private void createSigForParamTypeWithWC(RefType ref) {
+		for(RefTypeOrTPHOrWildcardOrGeneric p : ref.getParaList()) {
+			if(p instanceof WildcardType) {
+				if(((WildcardType) p).getInnerType() instanceof GenericRefType) {
+					String name = new TypeToSignature().visit((GenericRefType)((WildcardType) p).getInnerType());
+					if(!genericsAndBoundsMethod.containsKey(name) && !genericsAndBounds.containsKey(name)) {
+						sw.visitFormalTypeParameter(name);
+						sw.visitClassBound().visitClassType(Type.getInternalName(Object.class));
+						sw.visitClassBound().visitEnd();
+						genericsAndBoundsMethod.put(name, Type.getInternalName(Object.class));
+					}
+				}
+			}
+		}
+		
+	}
+
+	private boolean hasWC(RefType ref) {
+		for(RefTypeOrTPHOrWildcardOrGeneric p : ref.getParaList()) {
+			System.out.println("HAS WCs: " + p.acceptTV(new TypeToString()));
+			System.out.println("HAS WCs: " + p.getClass());
+			if(p.acceptTV(new TypeToString()).contains("WC"))
+				return true;
+			
+		}
+		return false;
+	}
+
 	private void createSignatureForParameterizedType(RefType ref) {
 		ArrayList<GenericInsertPair> allPairs = getAllPairs(ref);
 		allPairs.addAll(methodPairs);
@@ -347,7 +385,7 @@ public class Signature {
 	
 	private boolean hasTPHs(RefType ref) {
 		for(RefTypeOrTPHOrWildcardOrGeneric p : ref.getParaList()) {
-			System.out.println(p.acceptTV(new TypeToString()));
+			System.out.println("HAS TPHs: " + p.acceptTV(new TypeToString()));
 			if(p.acceptTV(new TypeToString()).contains("WC")){
 				continue;
 			}
diff --git a/src/de/dhbwstuttgart/bytecode/signature/TypeToSignature.java b/src/de/dhbwstuttgart/bytecode/signature/TypeToSignature.java
index 31d288f7..3bad4066 100644
--- a/src/de/dhbwstuttgart/bytecode/signature/TypeToSignature.java
+++ b/src/de/dhbwstuttgart/bytecode/signature/TypeToSignature.java
@@ -48,7 +48,7 @@ public class TypeToSignature implements TypeVisitor<String> {
 	@Override
 	public String visit(SuperWildcardType superWildcardType) {
 //		throw new NotImplementedException();
-		return "-" + superWildcardType.getInnerType().acceptTV(new TypeToSignature());
+		return "+" + superWildcardType.getInnerType().acceptTV(new TypeToSignature());
 	}
 
 	@Override
@@ -60,7 +60,7 @@ public class TypeToSignature implements TypeVisitor<String> {
 	@Override
 	public String visit(ExtendsWildcardType extendsWildcardType) {
 //		throw new NotImplementedException();
-		return "+" + extendsWildcardType.getInnerType().acceptTV(new TypeToSignature());
+		return "-" + extendsWildcardType.getInnerType().acceptTV(new TypeToSignature());
 	}
 
 	@Override
diff --git a/test/bytecode/MergeTest.java b/test/bytecode/MergeTest.java
new file mode 100644
index 00000000..37345ca8
--- /dev/null
+++ b/test/bytecode/MergeTest.java
@@ -0,0 +1,43 @@
+package bytecode;
+
+import static org.junit.Assert.*;
+
+import java.io.File;
+import java.net.URL;
+import java.net.URLClassLoader;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import de.dhbwstuttgart.core.JavaTXCompiler;
+
+public class MergeTest {
+	private static String path;
+	private static File fileToTest;
+	private static JavaTXCompiler compiler;
+	private static ClassLoader loader;
+	private static Class<?> classToTest;
+	private static String pathToClassFile;
+	private static Object instanceOfClass;
+	
+//	@BeforeClass
+//	public static void setUpBeforeClass() throws Exception {
+//		path = System.getProperty("user.dir")+"/test/bytecode/javFiles/Merge.jav";
+//		fileToTest = new File(path);
+//		compiler = new JavaTXCompiler(fileToTest);
+//		compiler.generateBytecode(System.getProperty("user.dir")+"/testBytecode/generatedBC/");
+//		pathToClassFile = System.getProperty("user.dir")+"/testBytecode/generatedBC/";
+//		loader = new URLClassLoader(new URL[] {new URL("file://"+pathToClassFile)});
+//		classToTest = loader.loadClass("Merge");
+//		instanceOfClass = classToTest.getDeclaredConstructor().newInstance();
+//	}
+
+	@Test
+	public void generateBC() throws Exception{
+		path = System.getProperty("user.dir")+"/test/bytecode/javFiles/Merge.jav";
+		fileToTest = new File(path);
+		compiler = new JavaTXCompiler(fileToTest);
+		compiler.generateBytecode(System.getProperty("user.dir")+"/testBytecode/generatedBC/");
+	}
+
+}
diff --git a/test/bytecode/javFiles/Merge.jav b/test/bytecode/javFiles/Merge.jav
new file mode 100644
index 00000000..b2cd9920
--- /dev/null
+++ b/test/bytecode/javFiles/Merge.jav
@@ -0,0 +1,17 @@
+import java.util.List;
+import java.lang.Integer;
+import java.util.Collection;
+
+class Merge {
+
+	merge(a, b) {
+     	a.addAll(b);
+		return a;
+	}
+
+  	sort(in){
+		var firstHalf = in.subList(1,2);
+    	var secondHalf = in.subList(1,2);
+    	return merge(sort(firstHalf), sort(secondHalf));
+    }
+}
\ No newline at end of file
diff --git a/test/bytecode/javFiles/PTGen.jav b/test/bytecode/javFiles/PTGen.jav
new file mode 100644
index 00000000..f08bdc83
--- /dev/null
+++ b/test/bytecode/javFiles/PTGen.jav
@@ -0,0 +1,5 @@
+public class PTGen {
+	m(List<E> list) {
+		return list;
+	}
+}
\ No newline at end of file