程序代码：

package hehe_1;

public class MethodOverride {
    public static void main(String[] args) {

        SubClass s = new SubClass();
        s.fun();
    }
}


class SuperClass {
    int i = 1;
    public void fun() {
        System.out.println("super");
        System.out.println("父类的i=" + i);

    }
}


class SubClass extends SuperClass {
    int i = 2;
    public void fun()

    {
        System.out.println("Sub");
        System.out.println("子类的i=" + i);
        super.fun();
    }
}