package cn.jxau.swingtest;
class A {
public int a = 0;
public void fun(){
System.out.println("-----A-----");
}
}
public class B extends A{
public int a = 1;
public void fun(){
System.out.println("-----B-----");
}
public static void main(String[] args){
A classA = new B();
System.out.println(classA.a);
classA.fun();
}
}
运行结果：
image.png
