Do interfaces have toString method? [duplicate]

Answer 1

You can't call for Interface toString() method because they only have the methods you declare.

But you can trick the system. Every object have a toString() method and it is obvious that your interface be implemented by class that extend object so you will have it too.

So you can do some thing like that:

public static void main(String[] args) 
    {
        My m=new C();
        String s= m + ""; // the toString() of the C class will be called here
        System.out.println(s);
    }