diff --git a/src/de/dhbwstuttgart/syntaxtree/Method.java b/src/de/dhbwstuttgart/syntaxtree/Method.java
index 6dae2e1df..7d18c6346 100755
--- a/src/de/dhbwstuttgart/syntaxtree/Method.java
+++ b/src/de/dhbwstuttgart/syntaxtree/Method.java
@@ -23,18 +23,12 @@ import de.dhbwstuttgart.syntaxtree.statement.Block;
 public class Method extends Field implements IItemWithOffset
 {
 	private Block block;
-	private ParameterList parameterlist = new ParameterList(null, new NullToken());
+	private ParameterList parameterlist = new ParameterList(new ArrayList<>(), new NullToken());
 	private ExceptionList exceptionlist;
-	private String name;
-
-	private List<String> types_in_parameterlist = new ArrayList<>();
-	private int modifiers;
-	private ParameterList parameterList;
 
 	public Method(String name, RefTypeOrTPH returnType, int modifiers, ParameterList parameterList, Block block,
 				  GenericDeclarationList gtvDeclarations, Token offset) {
 		super(name, returnType, modifiers, offset);
-		this.name = name;
 		this.parameterlist = parameterList;
 		this.block = block;
 	}
@@ -47,6 +41,6 @@ public class Method extends Field implements IItemWithOffset
 	}
 
 	public ParameterList getParameterList() {
-		return parameterList;
+		return parameterlist;
 	}
 }
diff --git a/src/de/dhbwstuttgart/syntaxtree/statement/MethodCall.java b/src/de/dhbwstuttgart/syntaxtree/statement/MethodCall.java
index f2537cfce..7b33f17b4 100755
--- a/src/de/dhbwstuttgart/syntaxtree/statement/MethodCall.java
+++ b/src/de/dhbwstuttgart/syntaxtree/statement/MethodCall.java
@@ -38,6 +38,7 @@ public class MethodCall extends Statement
                 methodConstraints.addConstraint(m.getArgTypes().get(i),
                         arglist.getArguments().get(i).getType());
             }
+            overloading.addConstraint(methodConstraints);
         }
         ret.add(overloading);
         return ret;
diff --git a/src/de/dhbwstuttgart/typeinference/OderConstraint.java b/src/de/dhbwstuttgart/typeinference/OderConstraint.java
index 4fc1d3f22..e1709ad67 100755
--- a/src/de/dhbwstuttgart/typeinference/OderConstraint.java
+++ b/src/de/dhbwstuttgart/typeinference/OderConstraint.java
@@ -1,16 +1,13 @@
 package de.dhbwstuttgart.typeinference;
 
-import java.util.ArrayList;
-import java.util.Set;
-import java.util.TreeSet;
-import java.util.Vector;
+import java.util.*;
 
 
 public class OderConstraint extends OderMenge<Pair>{
 	private Set<UndConstraint> oderConstraintPairs;
 	
 	public OderConstraint(){
-		oderConstraintPairs = new TreeSet<>();
+		oderConstraintPairs = new HashSet<>();
 	}
 	
 	
diff --git a/src/de/dhbwstuttgart/typeinference/UndConstraint.java b/src/de/dhbwstuttgart/typeinference/UndConstraint.java
index 51b3819f7..d6809defc 100755
--- a/src/de/dhbwstuttgart/typeinference/UndConstraint.java
+++ b/src/de/dhbwstuttgart/typeinference/UndConstraint.java
@@ -1,9 +1,6 @@
 package de.dhbwstuttgart.typeinference;
 
-import java.util.Collection;
-import java.util.Set;
-import java.util.TreeSet;
-import java.util.Vector;
+import java.util.*;
 
 import de.dhbwstuttgart.exceptions.DebugException;
 import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPH;
@@ -16,7 +13,7 @@ import de.dhbwstuttgart.typeinference.unify.Unifikationsalgorithmus;
  */
 public class UndConstraint extends UndMenge<Pair> {
 
-	Set<EinzelElement<Pair>> set = new TreeSet<>();
+	Set<EinzelElement<Pair>> set = new HashSet<>();
 	
 	@Override
 	public Set<? extends KomplexeMenge<Pair>> getSet() {
diff --git a/test/javFiles/MethodsEasy.jav b/test/javFiles/MethodsEasy.jav
index 24cbd52d0..36d0b4d44 100644
--- a/test/javFiles/MethodsEasy.jav
+++ b/test/javFiles/MethodsEasy.jav
@@ -1,6 +1,6 @@
 
 class Methods {
-    mt4(a,b,c) { return a.add(b).sub(c) ; }
+    mt4(a,b,c) { return a.mt3(b).mt3(c) ; }
 
     mt3(a) {return a.add();  }
 }