面向对象继承，覆盖

class fu{
int num=4;
public void show(){
System.out.println(num);
}
void speek(){
System.out.println("fu.speek");
}
}
class zi extends fu{
int num=5;
public void show(){
super.show();
System.out.println(num);
}
void speek(){
super.speek();
System.out.println("zi.sppek");
}
}










public class demo8 {
      public static void main(String[] args){
     zi z=new zi();
     z.show();
     z.speek();
      }
}