class A{
int x=2；
public void setx(int i){
x=i;
}
void printa(){
System.out.println(x);
}
}
class B extends A{
int x=100;
void printb(){
super.x=super.x+10
System.out.println("super.x="+super.x+" x="+x);
}
}
public class Tester{
public static void main (String [] args){
A a1=new A();
a1.setx(4);
a1.printa();
B b1=new B();
b1.printb();l
b1.printa();
b1.setx(6);
b1.printb();
b1.printa();
a1.printa();
}
}