Data hiding in interface java

Question

    interface My{
        int x = 10;
    }
    class Temp implements My{
        int x = 20;
        public static void main(String[] s){
              System.out.println(new Temp().x);
        }
    }

This prints the result as 20. Is there any way that I can access the x that belongs to the interface in the class?

Answer 1

You need to do an explicit cast to the interface type:

System.out.println(((My)new Temp()).x);

Note however that x is not bound to any instance of My . Interface fields are implicitly static and final (more of constants), meaning the above can be done using:

System.out.println(My.x);

Answer 2

You can always use this.

interface My {

    int x = 10;
}

class Temp implements My {

    int x = 20;

    public static void main(String[] s) {
        System.out.println(new Temp().x);        // 20
        System.out.println(My.x);                // 10
    }
}

fields of an Interface are always static.