class A{
int x,y; A(){ x=100; y=200; } A(int x,int y){ this.x=x; this.y=y; }}class B extends A{ int z; B(int x,int y){ super(x,y); z=300; } B(){ super(); z=800; } public void f(){ System.out.printf("x=%d,y=%d,z=%d\n",x,y,z); }}public class Example5_6{ public static void main(String arg[]){ B b1=new B(10,20); b1.f(); B b2=new B(); b2.f(); }}