diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedAssignment.java b/src/main/java/de/maishai/typedast/typedclass/TypedAssignment.java
index 18ed031..af84261 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedAssignment.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedAssignment.java
@@ -27,7 +27,7 @@ public class TypedAssignment implements TypedStatement {
         typeCheck(typedProgram);
     }
 
-    public void convertToTypedAssignment(TypedProgram typedProgram, Assignment untyped) {
+    private void convertToTypedAssignment(TypedProgram typedProgram, Assignment untyped) {
         value = convertExpression(typedProgram, untyped.value());
         location = new TypedFieldVarAccess(typedProgram, untyped.location());
     }
@@ -36,7 +36,7 @@ public class TypedAssignment implements TypedStatement {
     public Type typeCheck(TypedProgram typedProgram) {
         TypedClass currentClass = typedProgram.getCurrentClass();
 
-        if (currentClass.isCurrentMainMethodPresent() && location.getField() && location.getRecursiveOwnerChain() == null) {
+        if (Boolean.TRUE.equals(currentClass.isCurrentMainMethodPresent() && location.getField()) && location.getRecursiveOwnerChain() == null) {
             throw new RuntimeException("Main Method, is not allowed to have fields, they are not static");
         }
 
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedBinary.java b/src/main/java/de/maishai/typedast/typedclass/TypedBinary.java
index 457df79..4af1a7e 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedBinary.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedBinary.java
@@ -27,7 +27,7 @@ public class TypedBinary implements TypedExpression {
         typeCheck(typedProgram);
     }
 
-    public void convertToTypedBinary(TypedProgram typedProgram, Binary unTypedBinary) {
+    private void convertToTypedBinary(TypedProgram typedProgram, Binary unTypedBinary) {
         left = convertExpression(typedProgram, unTypedBinary.left());
         right = convertExpression(typedProgram, unTypedBinary.right());
         op = unTypedBinary.op();
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedBlock.java b/src/main/java/de/maishai/typedast/typedclass/TypedBlock.java
index 8bb1b03..6d8394b 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedBlock.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedBlock.java
@@ -31,7 +31,7 @@ public class TypedBlock implements TypedNode {
         this.stmts = stmts;
     }
 
-    public void convertToTypedBlock(TypedProgram typedProgram, Block unTypedBlock) {
+    private void convertToTypedBlock(TypedProgram typedProgram, Block unTypedBlock) {
 
         if (unTypedBlock == null) {
             return;
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedBoolLiteral.java b/src/main/java/de/maishai/typedast/typedclass/TypedBoolLiteral.java
index 7d38bd4..ce26710 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedBoolLiteral.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedBoolLiteral.java
@@ -21,7 +21,7 @@ public class TypedBoolLiteral implements TypedExpression {
         convertToTypedBoolLiteral(unTypedBoolLiteral);
     }
 
-    public void convertToTypedBoolLiteral(BoolLiteral unTypedBoolLiteral) {
+    private void convertToTypedBoolLiteral(BoolLiteral unTypedBoolLiteral) {
         value = unTypedBoolLiteral.value();
         type = Type.BOOL;
     }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedCharLiteral.java b/src/main/java/de/maishai/typedast/typedclass/TypedCharLiteral.java
index 30b076c..cd88558 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedCharLiteral.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedCharLiteral.java
@@ -17,7 +17,7 @@ public class TypedCharLiteral implements TypedExpression {
         convertToCharLiteral(unTypedCharLiteral);
     }
 
-    public void convertToCharLiteral(CharLiteral unTypedCharLiteral) {
+    private void convertToCharLiteral(CharLiteral unTypedCharLiteral) {
         value = unTypedCharLiteral.value();
         type = Type.CHAR;
     }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedClass.java b/src/main/java/de/maishai/typedast/typedclass/TypedClass.java
index a1c1dcd..08cbd1e 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedClass.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedClass.java
@@ -56,7 +56,7 @@ public class TypedClass implements TypedNode {
             typedDeclarations.add(new TypedDeclaration(typedProgram, declaration));
         }
         for (Constructor constructor : c.constructors()) {
-            typedConstructors.add(new TypedConstructor(typedProgram, constructor, this.className));
+            typedConstructors.add(new TypedConstructor(constructor, this.className));
         }
 
         for (Method method : c.methods()) {
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedConstructor.java b/src/main/java/de/maishai/typedast/typedclass/TypedConstructor.java
index f7e4d43..14a55f2 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedConstructor.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedConstructor.java
@@ -32,28 +32,33 @@ public class TypedConstructor implements TypedNode {
         this.typedParameters = typedParameters;
         this.typedBlock = typedBlock;
     }
-    public TypedConstructor(TypedProgram typedProgram, Constructor unTypedConstructor, String className) {
-        convertToTypedConstructor(typedProgram, unTypedConstructor, className);
+    public TypedConstructor(Constructor unTypedConstructor, String className) {
+        convertToTypedConstructor(unTypedConstructor, className);
     }
 
-    public void convertToTypedConstructor(TypedProgram typedProgram, Constructor unTypedConstructor, String className) {
+    private void convertToTypedConstructor(Constructor unTypedConstructor, String className) {
         if(!unTypedConstructor.className().equals(className)) {
             throw new RuntimeException("Constructor name "+ unTypedConstructor.className() +" must be the same as class name" + className);
         }
         name = unTypedConstructor.className();
-        convertToTypedParameter(typedProgram, unTypedConstructor.params());
+        convertToTypedParameter(unTypedConstructor.params());
         type = Type.VOID;
     }
 
-    private void convertToTypedParameter(TypedProgram typedProgram, List<Parameter> params) {
+    private void convertToTypedParameter(List<Parameter> params) {
         for (Parameter param : params) {
-            TypedParameter typedParameter = new TypedParameter(typedProgram, param);
+            TypedParameter typedParameter = new TypedParameter(param);
             checkIfParameterExists(typedParameter.getParaName());
             typedParameters.add(typedParameter);
             localVariables.add(new TypedLocalVariable(typedParameter.getParaName(), typedParameter.getType()));
         }
     }
 
+    public void convertToBlock(TypedProgram typedProgram, Constructor unTypedConstructor) {
+        this.typedBlock = new TypedBlock(typedProgram, unTypedConstructor.block());
+        typeCheck(typedProgram);
+    }
+
     @Override
     public Type typeCheck(TypedProgram typedProgram) {
         type = typedBlock.typeCheck(typedProgram);
@@ -64,8 +69,6 @@ public class TypedConstructor implements TypedNode {
         return type;
     }
 
-
-
     public boolean isLocalVariablePresent(String localVarName) {
         return localVariables.stream().anyMatch(localVariable -> localVariable.getName().equals(localVarName));
     }
@@ -88,11 +91,6 @@ public class TypedConstructor implements TypedNode {
         }
     }
 
-    public void convertToBlock(TypedProgram typedProgram, Constructor unTypedConstructor) {
-        this.typedBlock = new TypedBlock(typedProgram, unTypedConstructor.block());
-        typeCheck(typedProgram);
-    }
-
     public void deleteLocalVariableInConstructor(String localVarName) {
         localVariables.removeIf(localVariable -> localVariable.getName().equals(localVarName));
     }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedDeclaration.java b/src/main/java/de/maishai/typedast/typedclass/TypedDeclaration.java
index 33281c1..a8dd934 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedDeclaration.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedDeclaration.java
@@ -19,22 +19,20 @@ public final class TypedDeclaration implements TypedNode {
 
     public TypedDeclaration(TypedProgram typedProgram, Declaration declaration) {
         convertToTypedDeclaration(typedProgram, declaration);
+        typeCheck(typedProgram);
     }
 
-    public void convertToTypedDeclaration(TypedProgram typedProgram, Declaration declaration) {
+    private void convertToTypedDeclaration(TypedProgram typedProgram, Declaration declaration) {
         name = declaration.name();
         type = declaration.type();
-        typeCheck(typedProgram);
     }
 
     @Override
     public Type typeCheck(TypedProgram typedProgram) {
         TypedClass currentClass = typedProgram.getCurrentClass();
 
-        if (type.getReference() != null && !currentClass.getClassName().equals(type.getReference())) {
-            if (!typedProgram.isTypedClassPresent(type.getReference())) {
+        if (type.getReference() != null && !currentClass.getClassName().equals(type.getReference()) && !typedProgram.isTypedClassPresent(type.getReference())) {
                 throw new RuntimeException("Type " + type.getReference() + " not found");
-            }
         }
 
         if (currentClass.isThereField(name)) {
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedDoWhile.java b/src/main/java/de/maishai/typedast/typedclass/TypedDoWhile.java
index 4f6827c..45d0d49 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedDoWhile.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedDoWhile.java
@@ -21,7 +21,7 @@ public class TypedDoWhile implements TypedStatement {
         typeCheck(typedProgram);
     }
 
-    public void convertToTypedDoWhile(TypedProgram typedProgram, DoWhile unTypedDoWhile) {
+    private void convertToTypedDoWhile(TypedProgram typedProgram, DoWhile unTypedDoWhile) {
         typedBlock = new TypedBlock(typedProgram, unTypedDoWhile.block());
         cond = convertExpression(typedProgram, unTypedDoWhile.cond());
     }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedFieldVarAccess.java b/src/main/java/de/maishai/typedast/typedclass/TypedFieldVarAccess.java
index 982565e..b021842 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedFieldVarAccess.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedFieldVarAccess.java
@@ -30,7 +30,7 @@ public class TypedFieldVarAccess implements TypedExpression {
         typeCheck(typedProgram);
     }
 
-    public void convertToTypedFieldVarAccess(TypedProgram typedProgram, FieldVarAccess unTypedFieldVarAccess) {
+    private void convertToTypedFieldVarAccess(TypedProgram typedProgram, FieldVarAccess unTypedFieldVarAccess) {
         field = unTypedFieldVarAccess.field();
         recursiveOwnerChain = convertExpression(typedProgram, unTypedFieldVarAccess.recursiveOwnerChain());
         name = unTypedFieldVarAccess.id();
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedFor.java b/src/main/java/de/maishai/typedast/typedclass/TypedFor.java
index 0b1181f..03998ee 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedFor.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedFor.java
@@ -25,7 +25,7 @@ public class TypedFor implements TypedStatement {
         typeCheck(typedProgram);
     }
 
-    public void convertToTypedFor(TypedProgram typedProgram, For unTypedFor) {
+    private void convertToTypedFor(TypedProgram typedProgram, For unTypedFor) {
         assign = new TypedAssignment(typedProgram, unTypedFor.assign());
         cond = convertExpression(typedProgram, unTypedFor.cond());
         inc = new TypedAssignment(typedProgram, unTypedFor.inc());
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedIfElse.java b/src/main/java/de/maishai/typedast/typedclass/TypedIfElse.java
index 52c1182..dbca1cb 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedIfElse.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedIfElse.java
@@ -24,7 +24,7 @@ public class TypedIfElse implements TypedStatement {
         typeCheck(typedProgram);
     }
 
-    public void convertToTypedIfElse(TypedProgram typedProgram, IfElse unTypedIfElse) {
+    private void convertToTypedIfElse(TypedProgram typedProgram, IfElse unTypedIfElse) {
         ifTypedBlock = new TypedBlock(typedProgram, unTypedIfElse.ifBlock());
         elseTypedBlock = new TypedBlock(typedProgram, unTypedIfElse.elseBlock());
         typedCon = convertExpression(typedProgram, unTypedIfElse.cond());
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedIntLiteral.java b/src/main/java/de/maishai/typedast/typedclass/TypedIntLiteral.java
index c561397..82d4b04 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedIntLiteral.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedIntLiteral.java
@@ -20,7 +20,7 @@ public class TypedIntLiteral implements TypedExpression {
         convertToTypedIntLiteral(unTypedIntLiteral);
     }
 
-    public void convertToTypedIntLiteral(IntLiteral unTypedIntLiteral) {
+    private void convertToTypedIntLiteral(IntLiteral unTypedIntLiteral) {
         value = unTypedIntLiteral.value();
         type = Type.INT;
     }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedLocalVariable.java b/src/main/java/de/maishai/typedast/typedclass/TypedLocalVariable.java
index 710cc1c..1acc97b 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedLocalVariable.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedLocalVariable.java
@@ -17,13 +17,13 @@ public final class TypedLocalVariable implements TypedNode {
     private Type type;
 
     public TypedLocalVariable(TypedProgram typedProgram, Declaration declaration) {
-        convertToTypedLocalVariable(typedProgram, declaration);
+        convertToTypedLocalVariable(declaration);
+        typeCheck(typedProgram);
     }
 
-    public void convertToTypedLocalVariable(TypedProgram typedProgram, Declaration declaration) {
+    private void convertToTypedLocalVariable(Declaration declaration) {
         name = declaration.name();
         type = declaration.type();
-        typeCheck(typedProgram);
     }
 
     @Override
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedMethod.java b/src/main/java/de/maishai/typedast/typedclass/TypedMethod.java
index 2048b53..677ee77 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedMethod.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedMethod.java
@@ -26,18 +26,24 @@ public class TypedMethod implements TypedNode {
         convertToTypedMethod(typedProgram, unTypedMethod);
     }
 
-    public void convertToTypedMethod(TypedProgram typedProgram, Method unTypedMethod) {
+    private void convertToTypedMethod(TypedProgram typedProgram, Method unTypedMethod) {
         TypedClass currentClass = typedProgram.getCurrentClass();
 
         name = unTypedMethod.methodName();
         returnType = unTypedMethod.type();
-        convertToTypedParameter(typedProgram, unTypedMethod.params());
+        convertToTypedParameter(unTypedMethod.params());
         currentClass.checkMethodExists(this);
     }
 
-    private void convertToTypedParameter(TypedProgram typedProgram, List<Parameter> params) {
+    public void convertToTypedBlock(TypedProgram typedProgram, Method unTypedMethod) {
+        typedBlock = new TypedBlock(typedProgram, unTypedMethod.block());
+        typeCheck(typedProgram);
+        localVariables.clear();
+    }
+
+    private void convertToTypedParameter(List<Parameter> params) {
         for (Parameter param : params) {
-            TypedParameter typedParameter = new TypedParameter(typedProgram, param);
+            TypedParameter typedParameter = new TypedParameter(param);
             checkIfParameterExists(typedParameter.getParaName());
             typedParameters.add(typedParameter);
             localVariables.add(new TypedLocalVariable(typedParameter.getParaName(), typedParameter.getType()));
@@ -51,12 +57,6 @@ public class TypedMethod implements TypedNode {
     }
 
 
-    public void convertToTypedBlock(TypedProgram typedProgram, Method unTypedMethod) {
-        typedBlock = new TypedBlock(typedProgram, unTypedMethod.block());
-        typeCheck(typedProgram);
-        localVariables.clear();
-    }
-
     public boolean isLocalVariablePresent(String localVarName) {
         return localVariables.stream().anyMatch(localVariable -> localVariable.getName().equals(localVarName));
     }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedMethodCall.java b/src/main/java/de/maishai/typedast/typedclass/TypedMethodCall.java
index cf893ad..65c2786 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedMethodCall.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedMethodCall.java
@@ -28,9 +28,8 @@ public class TypedMethodCall implements TypedExpression, TypedStatement {
         typeCheck(typedProgram);
     }
 
-    public void convertToTypedMethodCall(TypedProgram typedProgram, MethodCall unTypedMethodCall) {
+    private void convertToTypedMethodCall(TypedProgram typedProgram, MethodCall unTypedMethodCall) {
         recipient = new TypedFieldVarAccess(typedProgram, unTypedMethodCall.recipient());
-        //recipient.typeCheck(typedProgram);
         for (Expression arg : unTypedMethodCall.args()) {
             args.add(convertExpression(typedProgram, arg));
         }
@@ -40,6 +39,7 @@ public class TypedMethodCall implements TypedExpression, TypedStatement {
     public Type typeCheck(TypedProgram typedProgram) {
         TypedClass currentClass = typedProgram.getCurrentClass();
         String ownerChainName = null;
+
         if (currentClass.isCurrentMainMethodPresent() && recipient.getRecursiveOwnerChain() == null) {
             throw new RuntimeException("Main Method, is not allowed to have methods, they are not static");
         }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedNew.java b/src/main/java/de/maishai/typedast/typedclass/TypedNew.java
index 0ef32e5..7ba2510 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedNew.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedNew.java
@@ -23,7 +23,7 @@ public class TypedNew implements TypedExpression, TypedStatement {
         typeCheck(typedProgram);
     }
 
-    public void convertToTypedNew(TypedProgram typedProgram, New unTypedNew) {
+    private void convertToTypedNew(TypedProgram typedProgram, New unTypedNew) {
         type = unTypedNew.type();
         for (Expression arg : unTypedNew.args()) {
             args.add(convertExpression(typedProgram, arg));
@@ -32,8 +32,6 @@ public class TypedNew implements TypedExpression, TypedStatement {
 
     @Override
     public Type typeCheck(TypedProgram typedProgram) {
-        TypedClass currentClass = typedProgram.getCurrentClass();
-
         if (typedProgram.isTypedClassPresent(type.getReference())) {
             return Type.REFERENCE(type.getReference());
         }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedParameter.java b/src/main/java/de/maishai/typedast/typedclass/TypedParameter.java
index 67d106b..b4fec9e 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedParameter.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedParameter.java
@@ -12,25 +12,14 @@ public class TypedParameter implements TypedNode {
     private String paraName;
     private Type type;
 
-    public TypedParameter(TypedProgram typedProgram, Parameter unTypedParameter) {
-        convertToTypedParameter(typedProgram, unTypedParameter);
+    public TypedParameter(Parameter unTypedParameter) {
+        convertToTypedParameter(unTypedParameter);
     }
-
-    public void convertToTypedParameter(TypedProgram typedProgram, Parameter unTypedParameter) {
+    private void convertToTypedParameter(Parameter unTypedParameter) {
         paraName = unTypedParameter.name();
         type = unTypedParameter.type();
     }
 
-    @Override
-    public boolean equals(Object obj) {
-        if (obj instanceof TypedParameter) {
-            TypedParameter other = (TypedParameter) obj;
-            return paraName.equals(other.paraName) && type.equals(other.type);
-        }
-        return false;
-    }
-
-
     @Override
     public Type typeCheck(TypedProgram typedProgram) {
 
@@ -47,5 +36,14 @@ public class TypedParameter implements TypedNode {
         return type;
     }
 
+    @Override
+    public boolean equals(Object obj) {
+        if (obj instanceof TypedParameter) {
+            TypedParameter other = (TypedParameter) obj;
+            return paraName.equals(other.paraName) && type.equals(other.type);
+        }
+        return false;
+    }
+
 
 }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedProgram.java b/src/main/java/de/maishai/typedast/typedclass/TypedProgram.java
index e7daa7e..4b0c755 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedProgram.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedProgram.java
@@ -60,11 +60,11 @@ public class TypedProgram {
         return typedClasses.stream().anyMatch(clas -> clas.getClassName().equals(className));
     }
 
-    public void enterCurrentClass(TypedClass clas) {
+    private void enterCurrentClass(TypedClass clas) {
         currentClass = clas;
     }
 
-    public void exitCurrentClass() {
+    private void exitCurrentClass() {
         currentClass = null;
     }
 
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedReturn.java b/src/main/java/de/maishai/typedast/typedclass/TypedReturn.java
index ef190f8..2b5577e 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedReturn.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedReturn.java
@@ -25,7 +25,7 @@ public class TypedReturn implements TypedStatement {
         typeCheck(typedProgram);
     }
 
-    public void convertToTypedReturn(TypedProgram typedProgram, Return unTypedReturn) {
+    private void convertToTypedReturn(TypedProgram typedProgram, Return unTypedReturn) {
         ret = convertExpression(typedProgram, unTypedReturn.ret());
         if (ret == null) {
             type = Type.VOID;
@@ -39,8 +39,7 @@ public class TypedReturn implements TypedStatement {
         TypedClass currentClass = typedProgram.getCurrentClass();
         TypedMethod currentMethod = currentClass.getCurrentMethod();
 
-        if (currentClass.isCurrentMethodPresent()) {
-            if (currentMethod.getReturnType().getKind() != this.type.getKind()) {
+        if (currentClass.isCurrentMethodPresent() && currentMethod.getReturnType().getKind() != this.type.getKind()) {
                 StringBuilder exp = new StringBuilder();
                 exp.append("\nMismatched return type: ");
                 exp.append("\nExpected: ").append(currentMethod.getReturnType().getKind());
@@ -48,7 +47,7 @@ public class TypedReturn implements TypedStatement {
                 exp.append("\nMethod name: ").append(currentMethod.getName());
                 throw new RuntimeException(exp.toString());
             }
-        }
+
         return type;
     }
 
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedUnary.java b/src/main/java/de/maishai/typedast/typedclass/TypedUnary.java
index 8ee358e..37c5758 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedUnary.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedUnary.java
@@ -23,7 +23,7 @@ public class TypedUnary implements TypedExpression {
         typeCheck(typedProgram);
     }
 
-    public void convertToTypedUnary(TypedProgram typedProgram, Unary unTypedUnary) {
+    private void convertToTypedUnary(TypedProgram typedProgram, Unary unTypedUnary) {
         op = unTypedUnary.op();
         right = convertExpression(typedProgram, unTypedUnary.right());
     }
diff --git a/src/main/java/de/maishai/typedast/typedclass/TypedWhile.java b/src/main/java/de/maishai/typedast/typedclass/TypedWhile.java
index f26c8d8..475a9d2 100644
--- a/src/main/java/de/maishai/typedast/typedclass/TypedWhile.java
+++ b/src/main/java/de/maishai/typedast/typedclass/TypedWhile.java
@@ -24,7 +24,7 @@ public class TypedWhile implements TypedStatement {
         typeCheck(typedProgram);
     }
 
-    public void convertToTypedWhile(TypedProgram typedProgram, While unTypedWhile) {
+    private void convertToTypedWhile(TypedProgram typedProgram, While unTypedWhile) {
         cond = convertExpression(typedProgram, unTypedWhile.cond());
         typedBlock = new TypedBlock(typedProgram, unTypedWhile.block());
     }