public class Test {
public static void main(String[] args) {
A a = new B();
B b =(B)a;
System.out.println(a);
System.out.println(b);
System.out.println(a.a);
System.out.println(b.a);
System.out.println(a.show());
System.out.println(b.show());
}
}
class A{
public int a =3;
public String show(){
return "父类:a="+a;
}
}
class B extends A{
public int a =5;
public String show(){
return "子类:a="+a;
}
}
运行结果:
B@4f1d0d
B@4f1d0d
3
5
子类:a=5
子类:a=5
求解:为什么a,b明明指向的地址
相同,而属性值不同?