Java基础-instanceof

package com.hspedu.instanceof_;

import org.junit.Test;

public class TestInstanceof {

    @Test
    public void testInstanceof() {

        Son son = new Son();
        System.out.println(son instanceof Son); // true
        System.out.println(son instanceof Father);  // true

        Father father = new Son();
        System.out.println(father instanceof Father);   // true
        System.out.println(father instanceof Son);  // true
        System.out.println(father instanceof Object);   // true
    }
}


class Father {

}

class Son extends Father {

}

instanceof是判断对象的运行类型是否是改类，或其子类