/*  DO NOT REMOVE THESE BELOW COMMENTS

Created by Le Huu Dung
Published on www.huudungle.net  */

class A{
public void greeting(){
System.out.println("greeting from A");
}
}//A
class B extends A{
public void doSomething(){
System.out.println("B is doing something");
}
//viet de phuong thuc greeting
public void greeting(){
System.out.println("greeting from B");
}
}//B
public class OOP04{
public static void main(String[] a){
A obj1=new A();
B obj2=new B();
obj1.greeting();
obj2.doSomething();
obj2.greeting();
}
}