diff --git a/src/de/dhbwstuttgart/strucTypes/Solve.java b/src/de/dhbwstuttgart/strucTypes/Solve.java
index 1ccc8a2a..bc0b11d8 100644
--- a/src/de/dhbwstuttgart/strucTypes/Solve.java
+++ b/src/de/dhbwstuttgart/strucTypes/Solve.java
@@ -63,22 +63,33 @@ public class Solve {
 
 		// TODO Tnew
 		List<GenericTypeVar> values = new ArrayList<>();
+		// extract typeplaceholder (type variables) of clsA
 		TypeVar typeVar = new TypeVar(inferredTypes);
 		clsA.accept(typeVar);
 		final ArrayList<RefTypeOrTPHOrWildcardOrGeneric> bounds = new ArrayList<>();
 		final NullToken offset = new NullToken();
+		// add type variables of clsA as GenericTypeVar to values of GenericDeclarationList
 		typeVar.getTypeVars().stream().map(tph -> new GenericTypeVar(tph.getName(), bounds, offset, offset))
-				.forEach(values::add);
+				.forEach(gtv -> {
+					if (values.stream().map(GenericTypeVar::getName).noneMatch(gtv.getName()::equals)) {
+						values.add(gtv);
+					};
+				});
+		// add type variables of cs as GenericRefType to values of GenericDeclarationList
 		cs.stream().flatMap(c -> Stream.of(c.getSubtype(), c.getSupertype())).filter(t -> t instanceof TypePlaceholder)
 				.map(tph -> new GenericTypeVar(((TypePlaceholder) tph).getName(), bounds, offset, offset))
-				.forEach(values::add);
-		//TODO typevar(superclass)
-		GenericDeclarationList Tnew = new GenericDeclarationList(values, offset);
+				.forEach(gtv -> {
+					if (values.stream().map(GenericTypeVar::getName).noneMatch(gtv.getName()::equals)) {
+						values.add(gtv);
+					};
+				});
+		// TODO typevar(superclass)
+		GenericDeclarationList tNew = new GenericDeclarationList(values, offset);
 
 		if (!consistent(cs)) {
 			throw new InconsistentConstraintsException();
 		}
-		return new ClassOrInterfaceWithConstraints(this.clsA.accept(new InferTypes(inferredTypes)), Tnew,
+		return new ClassOrInterfaceWithConstraints(this.clsA.accept(new InferTypes(inferredTypes, tNew)), tNew,
 				this.constraints);
 
 	}
diff --git a/src/de/dhbwstuttgart/strucTypes/TYPEExpr.java b/src/de/dhbwstuttgart/strucTypes/TYPEExpr.java
index b1469f44..aacb73a2 100644
--- a/src/de/dhbwstuttgart/strucTypes/TYPEExpr.java
+++ b/src/de/dhbwstuttgart/strucTypes/TYPEExpr.java
@@ -88,7 +88,7 @@ public class TYPEExpr extends DefaultASTVisitor {
 	 * korrespondierenden Feld in der Instanz auf.
 	 * 
 	 * @param fieldVar
-	 * @return true, wenn ein passendes Feld in der Instanz gefungen wird.
+	 * @return true, wenn ein passendes Feld in der Instanz gefunden wird.
 	 */
 	private boolean inferFieldVarTypes(FieldVar fieldVar) {
 		if (fieldVar.receiver instanceof This) {
@@ -108,6 +108,7 @@ public class TYPEExpr extends DefaultASTVisitor {
 
 		// ermittelt den Typ ty0 von methodCall.receiver und mtype(m, ty0)
 		TypeExtract methodTypeVisitor = new TypeExtract();
+		// unterscheide methodcall.receiver == this
 		if (methodCall.receiver instanceof ExpressionReceiver
 				&& ((ExpressionReceiver) methodCall.receiver).expr instanceof This) {
 			this.aThis.accept(methodTypeVisitor);
diff --git a/src/de/dhbwstuttgart/strucTypes/visitor/InferTypes.java b/src/de/dhbwstuttgart/strucTypes/visitor/InferTypes.java
index 2542253d..1def5716 100644
--- a/src/de/dhbwstuttgart/strucTypes/visitor/InferTypes.java
+++ b/src/de/dhbwstuttgart/strucTypes/visitor/InferTypes.java
@@ -57,14 +57,28 @@ import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
 import de.dhbwstuttgart.syntaxtree.type.SuperWildcardType;
 import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
 
+/**
+ * Inferiert alle TypePlaceholder durch inferredTypes und erstzt sie durch
+ * GenericTypeVar, falls der Name des Typeplaceholder mit dem Namen eines
+ * generics in der GenericdeclarationList generics übereinstimmt.
+ * 
+ * @author mvr
+ *
+ */
 public class InferTypes implements ASTReturnVisitor {
 
 	private InferredTypes inferredTypes = new InferredTypes();
+	private GenericDeclarationList generics = new GenericDeclarationList(new ArrayList<>(), new NullToken());
 
 	public InferTypes(InferredTypes inferredTypes) {
 		this.inferredTypes = inferredTypes;
 	}
 
+	public InferTypes(InferredTypes inferredTypes, GenericDeclarationList generics) {
+		this.inferredTypes = inferredTypes;
+		this.generics = generics;
+	}
+
 	@Override
 	public SourceFile visit(SourceFile sourceFile) {
 		return new SourceFile(sourceFile.getPkgName(),
@@ -171,12 +185,19 @@ public class InferTypes implements ASTReturnVisitor {
 	@Override
 	public SuperWildcardType visit(SuperWildcardType superWildcardType) {
 		throw new NotImplementedException();
-
 	}
 
 	@Override
 	public RefTypeOrTPHOrWildcardOrGeneric visit(TypePlaceholder typePlaceholder) {
-		return inferredTypes.infer(typePlaceholder);
+
+		RefTypeOrTPHOrWildcardOrGeneric inferredType = inferredTypes.infer(typePlaceholder);
+		if (inferredType instanceof TypePlaceholder) {
+			TypePlaceholder inferredTypeTPH = (TypePlaceholder) inferredType;
+			if (generics.contains(inferredTypeTPH.getName())) {
+				return new GenericRefType(inferredTypeTPH.getName(), typePlaceholder.getOffset());
+			}
+		}
+		return inferredType;
 	}
 
 	@Override
@@ -342,7 +363,7 @@ public class InferTypes implements ASTReturnVisitor {
 
 	@Override
 	public SuperCall visit(SuperCall superCall) {
-		if(superCall.getArgumentList().getArguments() == null){
+		if (superCall.getArgumentList().getArguments() == null) {
 			return superCall;
 		}
 		return new SuperCall(superCall.getArgumentList().accept(this), superCall.getOffset());
diff --git a/src/de/dhbwstuttgart/strucTypes/visitor/TypeVar.java b/src/de/dhbwstuttgart/strucTypes/visitor/TypeVar.java
index 27354536..82ad319e 100644
--- a/src/de/dhbwstuttgart/strucTypes/visitor/TypeVar.java
+++ b/src/de/dhbwstuttgart/strucTypes/visitor/TypeVar.java
@@ -8,6 +8,12 @@ import de.dhbwstuttgart.syntaxtree.AbstractASTWalker;
 import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
 import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
 
+/**
+ * Extrahiert alle TypePlaceholder.
+ * 
+ * @author mvr
+ *
+ */
 public class TypeVar extends AbstractASTWalker {
 
 	private Set<TypePlaceholder> typeVars = new HashSet<>();
diff --git a/src/de/dhbwstuttgart/syntaxtree/GenericDeclarationList.java b/src/de/dhbwstuttgart/syntaxtree/GenericDeclarationList.java
index eb3e79d9..c7ac2c30 100644
--- a/src/de/dhbwstuttgart/syntaxtree/GenericDeclarationList.java
+++ b/src/de/dhbwstuttgart/syntaxtree/GenericDeclarationList.java
@@ -23,6 +23,10 @@ public class GenericDeclarationList extends SyntaxTreeNode implements Iterable<G
 		gtvs = values;
 		this.offsetOfLastElement = endOffset;
 	}
+	
+	public boolean contains(String genericTypeVarName){
+		return gtvs.stream().anyMatch(gtv-> gtv.getName().equals(genericTypeVarName));
+	}
 
 	@Override
 	public Iterator<GenericTypeVar> iterator() {