diff --git a/src/main/java/de/maishai/typedast/ExceptionHandler/TypeOfReturnNotMatchException.java b/src/main/java/de/maishai/typedast/ExceptionHandler/TypeOfReturnNotMatchException.java
new file mode 100644
index 0000000..64c93dc
--- /dev/null
+++ b/src/main/java/de/maishai/typedast/ExceptionHandler/TypeOfReturnNotMatchException.java
@@ -0,0 +1,17 @@
+package de.maishai.typedast.ExceptionHandler;
+
+import de.maishai.typedast.Type;
+
+public class TypeOfReturnNotMatchException extends RuntimeException{
+
+    public TypeOfReturnNotMatchException(String excepted, String actual, String name){
+        super("Mismatched return type: " +
+                " Expected: " + excepted +
+                " Actual: " + actual +
+                " Method name: " + name
+        );
+    }
+    public TypeOfReturnNotMatchException(String name){
+        super("Constructor " + name + " must not have a return");
+    }
+}
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedAssignment.java b/src/main/java/de/maishai/typedast/typedclass/TypedAssignment.java
index 8576a84..bf6d42a 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedAssignment.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedAssignment.java
@@ -1,6 +1,8 @@
 package de.maishai.typedast.typedclass;
 
 import de.maishai.ast.records.Assignment;
+import de.maishai.typedast.ExceptionHandler.TypeMismatchException;
+import de.maishai.typedast.ExceptionHandler.VariableNotDeclaredException;
 import de.maishai.typedast.MethodContext;
 import de.maishai.typedast.TypedExpression;
 import de.maishai.typedast.TypedStatement;
@@ -35,11 +37,15 @@ public class TypedAssignment implements TypedStatement {
         Type typeLeft = getTypeLeft(typedProgram);
         Type typeRight = value.typeCheck(typedProgram);
 
-        if (typeLeft.equals(typeRight)) {
-            type = typeLeft;
-            return typeLeft;
+        // so because of the collection of exceptions
+        if(typeLeft != null && typeRight != null){
+            if (typeLeft.equals(typeRight)) {
+                type = typeLeft;
+                return typeLeft;
+            }
         }
-        throw new RuntimeException("type of left not equals with type of right");
+        TypedProgram.addException("Type Not Match", new TypeMismatchException(typeRight.getKind().toString()));
+        return Type.VOID;
     }
 
     private Type getTypeLeft(TypedProgram typedProgram) {
@@ -58,7 +64,8 @@ public class TypedAssignment implements TypedStatement {
             return getTypeFromConstructorOrField(currentClass.getCurrentConstructor(), name, currentClass);
         }
 
-        throw new RuntimeException("Variable " + name + " not declared");
+        TypedProgram.addException(name, new VariableNotDeclaredException(name));
+        return null;
     }
 
     private Type getTypeFromMethodOrField(TypedMethod currentMethod, String name, TypedClass currentClass) {
@@ -67,7 +74,8 @@ public class TypedAssignment implements TypedStatement {
         } else if (currentClass.isThereField(name)) {
             return currentClass.getFieldType(name);
         } else {
-            throw new RuntimeException("Variable " + name + " not declared in method");
+            TypedProgram.addException(name, new VariableNotDeclaredException(name));
+            return null;
         }
     }
 
@@ -77,7 +85,8 @@ public class TypedAssignment implements TypedStatement {
         } else if (currentClass.isThereField(name)) {
             return currentClass.getFieldType(name);
         } else {
-            throw new RuntimeException("Variable " + name + " not declared in constructor");
+            TypedProgram.addException(name, new VariableNotDeclaredException(name));
+            return null;
         }
     }
 
@@ -99,14 +108,14 @@ public class TypedAssignment implements TypedStatement {
                 receiver = location.getRecursiveOwnerChain().getType().getReference();
             }
             ctx.getMv().visitFieldInsn(Opcodes.PUTFIELD, receiver, location.getName(), value.getType().getDescriptor());
-            System.out.println("PUTFIELD: " + receiver + " " + location.getName() + " " + value.getType().getDescriptor());
+           // System.out.println("PUTFIELD: " + receiver + " " + location.getName() + " " + value.getType().getDescriptor());
             ctx.popStack();
         } else {
             if(value.getType().getKind() == Type.Kind.REFERENCE) {
-                System.out.println("ASTORE " + ctx.getLocalVar(location.getName()).get().index());
+                //System.out.println("ASTORE " + ctx.getLocalVar(location.getName()).get().index());
                 ctx.getMv().visitVarInsn(Opcodes.ASTORE, ctx.getLocalVar(location.getName()).get().index());
             } else {
-                System.out.println("ISTORE " + ctx.getLocalVar(location.getName()).get().index());
+               // System.out.println("ISTORE " + ctx.getLocalVar(location.getName()).get().index());
                 ctx.getMv().visitVarInsn(Opcodes.ISTORE, ctx.getLocalVar(location.getName()).get().index());
             }
         }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedBinary.java b/src/main/java/de/maishai/typedast/typedclass/TypedBinary.java
index 30171b2..fd8ef95 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedBinary.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedBinary.java
@@ -2,6 +2,7 @@ package de.maishai.typedast.typedclass;
 
 import de.maishai.ast.Operator;
 import de.maishai.ast.records.Binary;
+import de.maishai.typedast.ExceptionHandler.TypeMismatchException;
 import de.maishai.typedast.MethodContext;
 import de.maishai.typedast.TypedExpression;
 import de.maishai.typedast.Type;
@@ -9,11 +10,8 @@ import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 import org.objectweb.asm.Label;
-import org.objectweb.asm.MethodVisitor;
 import org.objectweb.asm.Opcodes;
 
-import java.util.Map;
-
 import static de.maishai.typedast.Help.TypedExpressionHelp.convertExpression;
 
 @Data
@@ -46,21 +44,24 @@ public class TypedBinary implements TypedExpression {
                 type = Type.INT;
                 return Type.INT;
             } else {
-                throw new RuntimeException("Type mismatch in " + op);
+                TypedProgram.addException(op.name(), new TypeMismatchException(op.toString()));
+                return null;
             }
         } else if (op == Operator.GT || op == Operator.LT || op == Operator.GE || op == Operator.LE) {
             if (leftType == Type.INT && rightType == Type.INT) {
                 type = Type.BOOL;
                 return Type.BOOL;
             } else {
-                throw new RuntimeException("Type mismatch in " + op);
+                TypedProgram.addException(op.name(), new TypeMismatchException(op.toString()));
+                return null;
             }
         } else if (op == Operator.AND || op == Operator.OR) {
             if (leftType == Type.BOOL && rightType == Type.BOOL) {
                 type = Type.BOOL;
                 return Type.BOOL;
             } else {
-                throw new RuntimeException("Type mismatch in " + op);
+                TypedProgram.addException(op.name(), new TypeMismatchException(op.toString()));
+                return null;
             }
         }
 
@@ -68,7 +69,8 @@ public class TypedBinary implements TypedExpression {
             type = rightType;
             return type;
         }
-        throw new RuntimeException("Void can not be compared with Void");
+        TypedProgram.addException("Void", new RuntimeException("Void can not be compared with Void"));
+        return null;
     }
 
     @Override
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedConstructor.java b/src/main/java/de/maishai/typedast/typedclass/TypedConstructor.java
index 873866d..dd10bcf 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedConstructor.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedConstructor.java
@@ -3,6 +3,7 @@ package de.maishai.typedast.typedclass;
 import de.maishai.ast.records.Constructor;
 import de.maishai.ast.records.Parameter;
 import de.maishai.typedast.*;
+import de.maishai.typedast.ExceptionHandler.ParameterAlreadyExistsException;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.RequiredArgsConstructor;
@@ -63,7 +64,7 @@ public class TypedConstructor implements TypedNode {
 
     public void checkIfParameterExists(String paraName) {
         if (typedParameters.stream().anyMatch(parameter -> parameter.getParaName().equals(paraName))) {
-            throw new RuntimeException("Parameter " + paraName + " already exists");
+            TypedProgram.addException(paraName, new ParameterAlreadyExistsException(paraName));
         }
     }
 
@@ -79,7 +80,8 @@ public class TypedConstructor implements TypedNode {
     public Type typeCheck(TypedProgram typedProgram) {
         type = typedBlock.typeCheck(typedProgram);
         if (type != Type.VOID) {
-            throw new RuntimeException("Constructor must not habe a return statement");
+            TypedProgram.addException("ConstructorContainsReturn",new RuntimeException("Constructor must not habe a return statement"));
+            return null;
         }
 
         return type;
@@ -89,13 +91,13 @@ public class TypedConstructor implements TypedNode {
     public void codeGen(ClassContext ctx) {
         int accessModifier = Opcodes.ACC_PUBLIC; // ist laut Andi ok
         MethodVisitor mv = ctx.getCw().visitMethod(accessModifier, "<init>", CodeGenUtils.generateDescriptor(typedParameters.stream().map(TypedParameter::getType).toList(), Type.VOID), null, null);
-        System.out.println("Visiting method: " + "<init>" + CodeGenUtils.generateDescriptor(typedParameters.stream().map(TypedParameter::getType).toList(), Type.VOID));
+        //System.out.println("Visiting method: " + "<init>" + CodeGenUtils.generateDescriptor(typedParameters.stream().map(TypedParameter::getType).toList(), Type.VOID));
         MethodContext mctx = new MethodContext(ctx, mv);
         typedParameters.forEach(param -> mctx.registerVariable(param.getParaName(), param.getType()));
         //super();
         mctx.pushStack("this");
         mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
-        System.out.println("INVOKESPECIAL: " + "java/lang/Object" + " " + "<init>" + " " + "()V");
+        //System.out.println("INVOKESPECIAL: " + "java/lang/Object" + " " + "<init>" + " " + "()V");
         mctx.popStack();
 
         typedBlock.codeGen(mctx);
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedDeclaration.java b/src/main/java/de/maishai/typedast/typedclass/TypedDeclaration.java
index d653b54..5096f88 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedDeclaration.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedDeclaration.java
@@ -1,6 +1,7 @@
 package de.maishai.typedast.typedclass;
 
 import de.maishai.ast.records.Declaration;
+import de.maishai.typedast.ExceptionHandler.FieldAlreadyDeclaredException;
 import de.maishai.typedast.TypedNode;
 import de.maishai.typedast.Type;
 import lombok.AllArgsConstructor;
@@ -31,11 +32,13 @@ public final class TypedDeclaration implements TypedNode {
     public Type typeCheck(TypedProgram typedProgram) {
         if (type.getReference() != null && !typedProgram.getCurrentClass().getClassName().equals(type.getReference())) {
             if (!typedProgram.isTypedClassPresent(type.getReference())) {
-                throw new RuntimeException("Type " + type.getReference() + " not found");
+                TypedProgram.addException(type.getReference(), new RuntimeException("Type " + type.getReference() + " not found"));
+                return null;
             }
         }
         if (typedProgram.getCurrentClass().isThereField(name)) {
-            throw new RuntimeException("Field " + name + " already declared");
+            TypedProgram.addException(name, new FieldAlreadyDeclaredException(name));
+            return null;
         }
         return type;
     }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedDoWhile.java b/src/main/java/de/maishai/typedast/typedclass/TypedDoWhile.java
index 31294eb..b5725cf 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedDoWhile.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedDoWhile.java
@@ -29,7 +29,8 @@ public class TypedDoWhile implements TypedStatement {
     @Override
     public Type typeCheck(TypedProgram typedProgram) {
         if (cond.typeCheck(typedProgram) != Type.BOOL) {
-            throw new RuntimeException("Condition must be boolean");
+            TypedProgram.addException("ConditionError", new RuntimeException("Condition must be boolean"));
+            return null;
         }
         typedBlock.typeCheck(typedProgram);
         this.type = Type.VOID;
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedFieldVarAccess.java b/src/main/java/de/maishai/typedast/typedclass/TypedFieldVarAccess.java
index 123a982..ac52494 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedFieldVarAccess.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedFieldVarAccess.java
@@ -1,17 +1,15 @@
 package de.maishai.typedast.typedclass;
 
 import de.maishai.ast.records.*;
+import de.maishai.typedast.ExceptionHandler.VariableNotDeclaredException;
 import de.maishai.typedast.MethodContext;
 import de.maishai.typedast.TypedExpression;
 import de.maishai.typedast.Type;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
-import org.objectweb.asm.MethodVisitor;
 import org.objectweb.asm.Opcodes;
 
-import java.util.Map;
-
 import static de.maishai.typedast.Help.TypedExpressionHelp.convertExpression;
 
 @Data
@@ -56,7 +54,8 @@ public class TypedFieldVarAccess implements TypedExpression {
             type = typedProgram.getCurrentClass().getFieldType(typedFieldVarAccess.getName());
             return type;
         } else {
-            throw new RuntimeException("Field " + name + " not declared");
+            TypedProgram.addException(name,new RuntimeException("Field " + name + " not declared") );
+            return null;
         }
     }
 
@@ -66,7 +65,8 @@ public class TypedFieldVarAccess implements TypedExpression {
         } else if (typedProgram.getCurrentClass().isCurrentMethodPresent()) {
             return checkMethodVariableType(typedProgram);
         } else {
-            throw new RuntimeException("Variable " + name + " not declared");
+            TypedProgram.addException(name, new VariableNotDeclaredException(name));
+            return null;
         }
     }
 
@@ -100,7 +100,7 @@ public class TypedFieldVarAccess implements TypedExpression {
         } else if (recursiveOwnerChain instanceof TypedFieldVarAccess typedFieldVarAccess) {
             type = typedProgram.getCurrentClass().getFieldType(typedFieldVarAccess.getName());
         } else {
-            throw new RuntimeException("Variable " + name + " not declared");
+            TypedProgram.addException(name, new VariableNotDeclaredException(name));
         }
         return type;
     }
@@ -130,7 +130,7 @@ public class TypedFieldVarAccess implements TypedExpression {
         } else {
             int loadOpcode = type.getKind() == Type.Kind.REFERENCE ? Opcodes.ALOAD : Opcodes.ILOAD;
             ctx.getMv().visitVarInsn(loadOpcode, ctx.getLocalVar(name).get().index());
-            System.out.println(loadOpcode == Opcodes.ALOAD ? "ALOAD " + ctx.getLocalVar(name).get().index() : "ILOAD " + ctx.getLocalVar(name).get().index());
+            //System.out.println(loadOpcode == Opcodes.ALOAD ? "ALOAD " + ctx.getLocalVar(name).get().index() : "ILOAD " + ctx.getLocalVar(name).get().index());
         }
         ctx.pushAnonToStack();
     }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedFor.java b/src/main/java/de/maishai/typedast/typedclass/TypedFor.java
index 406f6b2..73c203a 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedFor.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedFor.java
@@ -36,7 +36,8 @@ public class TypedFor implements TypedStatement {
     public Type typeCheck(TypedProgram typedProgram) {
         assign.typeCheck(typedProgram);
         if (!cond.typeCheck(typedProgram).equals(Type.BOOL)) {
-            throw new RuntimeException("Condition must be a boolean");
+            TypedProgram.addException("ConditionError", new RuntimeException("Condition must be boolean"));
+            return null;
         }
         inc.typeCheck(typedProgram);
         type = typedBlock.typeCheck(typedProgram);
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedIntLiteral.java b/src/main/java/de/maishai/typedast/typedclass/TypedIntLiteral.java
index 08ec98c..c5d76ca 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedIntLiteral.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedIntLiteral.java
@@ -7,11 +7,8 @@ import de.maishai.typedast.Type;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.RequiredArgsConstructor;
-import org.objectweb.asm.MethodVisitor;
 import org.objectweb.asm.Opcodes;
 
-import java.util.Map;
-
 @Data
 @AllArgsConstructor
 @RequiredArgsConstructor
@@ -43,13 +40,13 @@ public class TypedIntLiteral implements TypedExpression {
     public void codeGen(MethodContext ctx) {
         if (value >= Byte.MIN_VALUE && value <= Byte.MAX_VALUE) {
             ctx.getMv().visitIntInsn(Opcodes.BIPUSH, value);
-            System.out.println("BIPUSH " + value);
+           // System.out.println("BIPUSH " + value);
         } else if (value >= Short.MIN_VALUE && value <= Short.MAX_VALUE) {
             ctx.getMv().visitIntInsn(Opcodes.SIPUSH, value);
-            System.out.println("SIPUSH " + value);
+           // System.out.println("SIPUSH " + value);
         } else {
             ctx.getMv().visitLdcInsn(value);
-            System.out.println("LDC " + value);
+           // System.out.println("LDC " + value);
         }
         ctx.pushInstantToStack();
     }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedLocalVariable.java b/src/main/java/de/maishai/typedast/typedclass/TypedLocalVariable.java
index ad73cbf..7d7ce8e 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedLocalVariable.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedLocalVariable.java
@@ -1,6 +1,8 @@
 package de.maishai.typedast.typedclass;
 
 import de.maishai.ast.records.Declaration;
+import de.maishai.typedast.ExceptionHandler.LocalVariableAlreadDeclaredException;
+import de.maishai.typedast.ExceptionHandler.NotFoundMethodOrConstructor;
 import de.maishai.typedast.MethodContext;
 import de.maishai.typedast.TypedNode;
 import de.maishai.typedast.Type;
@@ -30,19 +32,22 @@ public final class TypedLocalVariable implements TypedNode {
     public Type typeCheck(TypedProgram typedProgram) {
         if (typedProgram.getCurrentClass().isCurrentMethodPresent() && !typedProgram.getCurrentClass().isCurrentConstructorPresent()) {
             if (typedProgram.getCurrentClass().getCurrentMethod().isLocalVariableInMethod(name)) {
-                throw new RuntimeException("Variable " + name + " already declared");
+                TypedProgram.addException(name, new LocalVariableAlreadDeclaredException(name));
+                return null;
             }
             typedProgram.getCurrentClass().getCurrentMethod().getLocalVariables().add(this);
             return type;
         }
         if (!typedProgram.getCurrentClass().isCurrentMethodPresent() && typedProgram.getCurrentClass().isCurrentConstructorPresent()) {
             if (typedProgram.getCurrentClass().getCurrentConstructor().isLocalVariableInConstructor(name)) {
-                throw new RuntimeException("Variable " + name + " already declared");
+                TypedProgram.addException(name, new LocalVariableAlreadDeclaredException(name));
+                return null;
             }
             typedProgram.getCurrentClass().getCurrentConstructor().getLocalVariables().add(this);
             return type;
         }
-        throw new RuntimeException("not found method or constructor in class");
+        TypedProgram.addException("NotFoundMethodOrConstructor", new NotFoundMethodOrConstructor());
+        return null;
     }
 
     public void codeGen(MethodVisitor mv, MethodContext ctx) {
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedMethod.java b/src/main/java/de/maishai/typedast/typedclass/TypedMethod.java
index 3acbf7f..4ee8e3a 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedMethod.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedMethod.java
@@ -2,6 +2,7 @@ package de.maishai.typedast.typedclass;
 
 import de.maishai.ast.records.Method;
 import de.maishai.typedast.*;
+import de.maishai.typedast.ExceptionHandler.ParameterAlreadyExistsException;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
@@ -38,14 +39,14 @@ public class TypedMethod implements TypedNode {
 
         typedProgram.getCurrentClass().getTypedMethods().stream().filter(method -> method.equals(this)).findFirst().ifPresentOrElse(
                 method -> {
-                    throw new RuntimeException("Method " + name + " already exists");
+                    TypedProgram.addException(name, new RuntimeException("Method " + name + " already exists"));
                 }, () -> {
                 });
     }
 
     public void checkIfParameterExists(String parameterName) {
         if (typedParameters.stream().anyMatch(parameter -> parameter.getParaName().equals(parameterName))) {
-            throw new RuntimeException("Parameter " + parameterName + " already exists");
+            TypedProgram.addException(parameterName, new ParameterAlreadyExistsException(parameterName));
         }
     }
 
@@ -101,9 +102,11 @@ public class TypedMethod implements TypedNode {
         if (returnType != Type.VOID && !hasEvenReturnsInIfElseBlocks()) {
             if (typedBlock.typeCheck(typedProgram).getKind() != returnType.getKind()) {
                 if (hasEvenReturnsInIfElseBlocks()) {
-                    throw new RuntimeException("Method " + name + " must have even returns in if else blocks");
+                    TypedProgram.addException(name, new RuntimeException("Method " + name + " must have even returns in if else blocks"));
+                    return null;
                 } else {
-                    throw new RuntimeException("Method " + name + " must return " + returnType.getKind());
+                    TypedProgram.addException(name, new RuntimeException("Method " + name + " must return " + returnType.getKind()));
+                    return null;
                 }
             }
         }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedMethodCall.java b/src/main/java/de/maishai/typedast/typedclass/TypedMethodCall.java
index e6ea8a6..f0157f8 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedMethodCall.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedMethodCall.java
@@ -59,7 +59,8 @@ public class TypedMethodCall implements TypedExpression, TypedStatement {
             }
         }
 
-        throw new RuntimeException("Method not found");
+        TypedProgram.addException("MethodNotFound", new RuntimeException("Method not found") );
+        return null;
     }
 
     public Optional<Type> findMatchingMethod(TypedClass ownerChain, String methodName) {
@@ -99,7 +100,7 @@ public class TypedMethodCall implements TypedExpression, TypedStatement {
             methodOwnerClass = recipient.getRecursiveOwnerChain().getType().getReference();
         }
         ctx.getMv().visitMethodInsn(Opcodes.INVOKEVIRTUAL, methodOwnerClass, recipient.getName(), descriptor, false);
-        System.out.println("INVOKEVIRTUAL " + methodOwnerClass + " " + recipient.getName() + " " + descriptor);
+        //System.out.println("INVOKEVIRTUAL " + methodOwnerClass + " " + recipient.getName() + " " + descriptor);
         ctx.popStack(); // pop the owner
         for (TypedExpression arg : args) {
             ctx.popStack();
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedNew.java b/src/main/java/de/maishai/typedast/typedclass/TypedNew.java
index 8442f31..281d2d6 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedNew.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedNew.java
@@ -3,9 +3,9 @@ package de.maishai.typedast.typedclass;
 import de.maishai.ast.records.Expression;
 import de.maishai.ast.records.New;
 import de.maishai.typedast.*;
+import de.maishai.typedast.ExceptionHandler.NotMatchConstructorException;
 import lombok.AllArgsConstructor;
 import lombok.Data;
-import org.objectweb.asm.MethodVisitor;
 import org.objectweb.asm.Opcodes;
 
 import java.util.ArrayList;
@@ -52,17 +52,18 @@ public class TypedNew implements TypedExpression, TypedStatement {
                 }
             }
         }
-        throw new RuntimeException("No matching constructor found");
+        TypedProgram.addException("notMatchConstructor", new NotMatchConstructorException());
+        return null;
     }
 
 
     @Override
     public void codeGen(MethodContext ctx) {
         ctx.getMv().visitTypeInsn(Opcodes.NEW, type.getReference());
-        System.out.println("NEW " + type.getReference());
+        //System.out.println("NEW " + type.getReference());
         ctx.pushAnonToStack();
         ctx.getMv().visitInsn(Opcodes.DUP);
-        System.out.println("DUP");
+       // System.out.println("DUP");
         ctx.pushAnonToStack();
         for (TypedExpression arg : args) {
             arg.codeGen(ctx);
@@ -71,6 +72,6 @@ public class TypedNew implements TypedExpression, TypedStatement {
         for (TypedExpression arg : args) {
             ctx.popStack();
         }
-        System.out.println("INVOKESPECIAL " + type.getReference() + "<init> " + CodeGenUtils.generateDescriptor(args.stream().map(TypedExpression::getType).toList(), Type.VOID));
+        //System.out.println("INVOKESPECIAL " + type.getReference() + "<init> " + CodeGenUtils.generateDescriptor(args.stream().map(TypedExpression::getType).toList(), Type.VOID));
     }
 }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedParameter.java b/src/main/java/de/maishai/typedast/typedclass/TypedParameter.java
index 6cc752a..e7ad1f2 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedParameter.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedParameter.java
@@ -1,6 +1,7 @@
 package de.maishai.typedast.typedclass;
 
 import de.maishai.ast.records.Parameter;
+import de.maishai.typedast.ExceptionHandler.ParameterAlreadyExistsException;
 import de.maishai.typedast.Type;
 import de.maishai.typedast.TypedNode;
 import lombok.AllArgsConstructor;
@@ -36,11 +37,13 @@ public class TypedParameter implements TypedNode {
 
         if (typedProgram.getCurrentClass().isCurrentMethodPresent()) {
             if (typedProgram.getCurrentClass().isParameterWitNameInMethod(paraName)) {
-                throw new RuntimeException("Parameter " + paraName + " already exists");
+                TypedProgram.addException(paraName, new ParameterAlreadyExistsException(paraName));
+                return null;
             }
         } else if (typedProgram.getCurrentClass().isCurrentConstructorPresent()) {
             if (typedProgram.getCurrentClass().isParameterWitNameInConstructor(paraName)) {
-                throw new RuntimeException("Parameter " + paraName + " already exists");
+                TypedProgram.addException(paraName, new ParameterAlreadyExistsException(paraName));
+                return null;
             }
         }
 
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedProgram.java b/src/main/java/de/maishai/typedast/typedclass/TypedProgram.java
index d30440b..728898a 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedProgram.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedProgram.java
@@ -5,12 +5,15 @@ import lombok.AllArgsConstructor;
 import lombok.Getter;
 
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 @Getter
 @AllArgsConstructor
 public class TypedProgram {
     private List<TypedClass> typedClasses = new ArrayList<>();
+    public static Map<String, Exception> EXCEPTIONS = new HashMap<>();
     private TypedClass currentClass;
 
     public TypedProgram(Program program) {
@@ -41,6 +44,21 @@ public class TypedProgram {
             exitCurrentClass();
             i++;
         }
+
+        if(EXCEPTIONS.isEmpty()){
+            System.out.println("Es wurde erfolgreich kompiliert.");
+        }else{
+            System.out.println("Es wurden insgesamt " + EXCEPTIONS.size() + " Fehlern gefunden:");
+            int counter = 0;
+            for(Map.Entry<String, Exception> entry : EXCEPTIONS.entrySet()){
+                System.out.println("["+ counter + "] Fehler: " +
+                        "\n Schlüssel: " + entry.getKey() +
+                        "\n Exception: " + entry.getValue().getClass().getSimpleName() +
+                        "\n Message: " + entry.getValue().getMessage()
+                );
+                counter++;
+            }
+        }
     }
 
     public TypedClass getTypedClass(String className) {
@@ -59,6 +77,12 @@ public class TypedProgram {
         currentClass = null;
     }
 
+    public static void addException(String name, Exception ex){
+        if(!EXCEPTIONS.containsKey(name)){
+            EXCEPTIONS.put(name, ex);
+        }
+    }
+
     @Override
     public boolean equals(Object obj) {
         if (this == obj) return true;
@@ -69,7 +93,7 @@ public class TypedProgram {
                         || currentClass.equals(other.currentClass))) {
             return true;
         } else {
-            System.out.println("TypedPrograms are not equal:\n" + this.typedClasses + "\n" + other.typedClasses + "\n");
+            //System.out.println("TypedPrograms are not equal:\n" + this.typedClasses + "\n" + other.typedClasses + "\n");
             return false;
         }
     }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedReturn.java b/src/main/java/de/maishai/typedast/typedclass/TypedReturn.java
index 5d33978..85e3f3d 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedReturn.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedReturn.java
@@ -3,6 +3,7 @@ package de.maishai.typedast.typedclass;
 
 import de.maishai.ast.records.*;
 import de.maishai.typedast.*;
+import de.maishai.typedast.ExceptionHandler.TypeOfReturnNotMatchException;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
@@ -35,12 +36,17 @@ public class TypedReturn implements TypedStatement {
     public Type typeCheck(TypedProgram typedProgram) {
         if (typedProgram.getCurrentClass().isCurrentMethodPresent()) {
             if (typedProgram.getCurrentClass().getCurrentMethod().getReturnType().getKind() != this.type.getKind()) {
-                StringBuilder exp = new StringBuilder();
-                exp.append("\nMismatched return type: ");
-                exp.append("\nExpected: ").append(typedProgram.getCurrentClass().getCurrentMethod().getReturnType().getKind());
-                exp.append("\nActual: ").append(this.type.getKind());
-                exp.append("\nMethod name: ").append(typedProgram.getCurrentClass().getCurrentMethod().getName());
-                throw new RuntimeException(exp.toString());
+                String key = "Type of return in " + typedProgram.getCurrentClass().getCurrentMethod().getName();
+                TypeOfReturnNotMatchException ex =  new TypeOfReturnNotMatchException(
+                        typedProgram.getCurrentClass().getCurrentMethod().getReturnType().getKind().name(),
+                        this.type.getKind().name(),
+                        typedProgram.getCurrentClass().getCurrentMethod().getName());
+                TypedProgram.addException(key, ex);
+            }
+        }
+        if (typedProgram.getCurrentClass().isCurrentConstructorPresent()) {
+            if (typedProgram.getCurrentClass().getCurrentConstructor().getType().getKind() != this.type.getKind()) {
+                TypedProgram.addException(typedProgram.getCurrentClass().getCurrentConstructor().getName(), new TypeOfReturnNotMatchException(typedProgram.getCurrentClass().getCurrentConstructor().getName()));
             }
         }
         return type;
@@ -50,15 +56,15 @@ public class TypedReturn implements TypedStatement {
     public void codeGen(MethodContext ctx) {
         if (ret == null) {
             ctx.getMv().visitInsn(Opcodes.RETURN);
-            System.out.println("RETURN");
+            //System.out.println("RETURN");
         } else {
             ret.codeGen(ctx);
             if (ret.getType().getKind() != Type.Kind.REFERENCE) {
                 ctx.getMv().visitInsn(Opcodes.IRETURN);
-                System.out.println("IRETURN");
+              //  System.out.println("IRETURN");
             } else {
                 ctx.getMv().visitInsn(Opcodes.ARETURN);
-                System.out.println("ARETURN");
+              //  System.out.println("ARETURN");
             }
         }
 
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedUnary.java b/src/main/java/de/maishai/typedast/typedclass/TypedUnary.java
index 152aa79..6d5c348 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedUnary.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedUnary.java
@@ -31,18 +31,21 @@ public class TypedUnary implements TypedExpression {
 
         if (op == UnaryOperator.NOT) {
             if (right.typeCheck(typedProgram) != Type.BOOL) {
-                throw new RuntimeException("Not operator must be applied to boolean");
+                TypedProgram.addException(UnaryOperator.NOT.name(), new RuntimeException("Not operator must be applied to boolean"));
+                return null;
             }
             return Type.BOOL;
         }
 
         if (op == UnaryOperator.SUB) {
             if (right.typeCheck(typedProgram) != Type.INT) {
-                throw new RuntimeException("Minus operator must be applied to int");
+                TypedProgram.addException(UnaryOperator.SUB.name(),new RuntimeException("Minus operator must be applied to int") );
+                return null;
             }
             return Type.INT;
         }
-        throw new RuntimeException("Unknown unary operator");
+        TypedProgram.addException("UnknownUnary",new RuntimeException("Unknown unary operator") );
+        return null;
     }
 
     @Override
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedWhile.java b/src/main/java/de/maishai/typedast/typedclass/TypedWhile.java
index 8119725..1b34bf9 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedWhile.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedWhile.java
@@ -28,7 +28,8 @@ public class TypedWhile implements TypedStatement {
     @Override
     public Type typeCheck(TypedProgram typedProgram) {
         if (cond.typeCheck(typedProgram) != Type.BOOL) {
-            throw new RuntimeException("While condition must be a boolean");
+            TypedProgram.addException("ConditionError",new RuntimeException("While condition must be a boolean") );
+            return null;
         }
         type = typedBlock.typeCheck(typedProgram);
         return type;