toString 重写
package com.test; public class Test extends Object {------------所有引用类型的父类都是Object private int id; private String name; public Test(int id, String name) { this.id = id; this.name = name; } @Override public String toString() {---------------------toString方法重写 return "Test [id=" + id + ", name=" + name + "]"; } }
equals方法重写
package com.test; public class Rabbit { public String name; public String furcolor; public int age; public Rabbit(String name, String furcolor, int age) { super(); this.name = name; this.furcolor = furcolor; this.age = age; } public boolean equals(Object obj) { if(obj == null) { return false; } else { if(obj instanceof Rabbit) { Rabbit rabbit = (Rabbit)obj; if(this.age == rabbit.age && this.name == rabbit.name && this.furcolor == rabbit.furcolor) { return true; } } } return false; } }
package com.test; public class Main { public static void main(String[] args) { // 所有的引用类型的父类都是Object /* Test t = new Test(23, "小明"); System.out.println(t);*/ Rabbit r1 = new Rabbit("小灰", "白色", 3); Rabbit r2 = new Rabbit("小灰", "白色", 3); System.out.println(r1 == r2); System.out.println(r1.equals(r2)); } }