public class myinterface

{

public static void main(String[] args)

{

mg y=new mg();

y.p();

y.printf();

y.printk();

y.printg();

mg x=new mg();

myi p=(myi)x;

p.callspi();

}

}

class myclass

{

public void print()

{

System.out.println("Hi! This is the method of the superclass.");

}

}

interface myi

{

public void printf();

public void callspi();

}

interface kyi extends myi

{

public void printk();

}

interface pyi

{

public void printg();

}

class mg extends myclass implements myi, pyi

{

public void p()

{

super.print();

}

public void printf()

{

System.out.println("Hi! This is the method of interface \'myi\'.");

}

public void printk()

{

System.out.println("Hi! This is the method of subinterface \'kyi\' of interface \'myi\'.");

}

public void printg()

{

System.out.println("This is the method of interface of \'pyi\'.");

}

public void callspi()

{

System.out.println("This is the method called when a new object is made of class which implements interface \'myi\' & then a variable of type \'myi\'is used to refer to it.");

}

}