diff --git a/resources/bytecode/javFiles/PairNoGenerics.jav b/resources/bytecode/javFiles/PairNoGenerics.jav
new file mode 100644
index 00000000..e69de29b
diff --git a/src/main/java/de/dhbwstuttgart/target/generate/GenerateGenerics.java b/src/main/java/de/dhbwstuttgart/target/generate/GenerateGenerics.java
index e966d29d..2f437d6e 100644
--- a/src/main/java/de/dhbwstuttgart/target/generate/GenerateGenerics.java
+++ b/src/main/java/de/dhbwstuttgart/target/generate/GenerateGenerics.java
@@ -1,5 +1,6 @@
 package de.dhbwstuttgart.target.generate;
 
+import com.google.common.collect.Streams;
 import de.dhbwstuttgart.parser.NullToken;
 import de.dhbwstuttgart.syntaxtree.ClassOrInterface;
 import de.dhbwstuttgart.syntaxtree.Constructor;
@@ -18,6 +19,8 @@ import de.dhbwstuttgart.util.Pair;
 
 import java.util.*;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
 
 public abstract class GenerateGenerics {
 
@@ -145,6 +148,7 @@ public abstract class GenerateGenerics {
             } else if (constraint instanceof PairTPHEqualTPH p) {
                 equality.put(p.getLeft(), p.getRight());
             } else if (constraint instanceof PairTPHequalRefTypeOrWildcardType p) {
+                System.out.println(p.left + " = " + p.right);
                 concreteTypes.put(new TPH(p.left), p.right);
             }
         }
@@ -761,14 +765,14 @@ public abstract class GenerateGenerics {
             oldFamily.clear();
             oldFamily.putAll(familyOfMethods);
             familyOfMethods.clear();
-            for (var method : classOrInterface.getMethods()) {
+            Stream.concat(classOrInterface.getMethods().stream(), classOrInterface.getConstructors().stream()).forEach(method -> {
                 family(classOrInterface, method);
-            }
+            });
         } while(!oldFamily.equals(familyOfMethods));
 
-        for (var method : classOrInterface.getMethods()) {
+        Stream.concat(classOrInterface.getMethods().stream(), classOrInterface.getConstructors().stream()).forEach(method -> {
             generics(classOrInterface, method);
-        }
+        });
     }
 
     private void findChain(Set<TPH> referenced, Set<Pair> input, Set<Pair> output, TPH start, TPH end, Set<TPH> chain) {