The method clone() from object is not visible?

Question

Question:

package GoodQuestions; public class MyClass {       MyClass() throws CloneNotSupportedException {         try {             throw new CloneNotSupportedException();         } catch(Exception e) {             e.printStackTrace();         }     }         public static void main(String[] args) {             try {             MyClass  obj = new MyClass();             MyClass obj3 = (MyClass)obj.clone();                     } catch (CloneNotSupportedException e) {             e.printStackTrace();         }     } } 

Here class 'MyClass' can able to clone its own object by calling the clone method in 'Object' class. When I try to clone the of this class('MyClass') in another class('TestSingleTon') in the same package 'GoodQuestions' it is throwing the following compile time error.

'The method clone() from the type Object is not visible'

So here is the code it throwing the above error?

package GoodQuestions; public class TestSingleTon {     public static void main(String[] args) {         MyClass  obj = new MyClass();         MyClass obj3 = obj.clone(); ---> here is the compile error.     } } 

Answer 1

clone() has protected access. Add this in MyClass

public Object clone(){       try{           return super.clone();       }catch(Exception e){          return null;      } } 

Also Change to public class MyClass implements Cloneable

Answer 2

This error occurs because in Object class clone() method is protected. So you have to override clone() method in respective class. Eg. Add below code in MyClass

@Override protected Object clone() throws CloneNotSupportedException {      return super.clone(); } 

Also implement Cloneable interface. Eg. public class MyClass implements Cloneable