class World{ World where(){ System.out.println("I think about our world"); return this; } } class CounSuperDemo extends World{ World where(){ System.out.println("I think about our country"); Return new World(); } } class State extends CounSuperDemo{ World where(){ System.out.println("I think about our State"); return new CounSuperDemo(); } } class SuperDemo extends State{ public static void main(String[] args) { CounSuperDemo c=new State(); c.where().where().where(); }