Object类的Cloneable接口没有实现所以需要自己进行相关的实现

Posted 2021-08-07 SmallCuteMonkey

实现的步骤：

1. 继承Object类，其实已经默认继承了Object
2. 实现 implements Cloneable接口， 因为Object没有实现Cloneable接口

package com.hou.pojo;


//object类本身并没有实现Cloneable这个接口，所以需要我们自己进行实现
public class User extends Object implements Cloneable {
    private Integer id;
    private String username;
    private String password;

   public User(){
       System.out.println("i am a brave boy and i love everyone");


   }

    public User(Integer id, String username, String password) {
        this.id = id;
        this.username = username;
        this.password = password;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\\'' +
                ", password='" + password + '\\'' +
                '}';
    }


    public User copyObject() throws CloneNotSupportedException {
//        Object clone = this.clone(); 方法一
        Object clone = super.clone();// 方法二
        return (User) clone;


    }

    public static void main(String[] args) throws Exception {
       User user=new User(1,"iamakindandloveboy","111");
        System.out.println(user+"------------");

        User user1 = user.copyObject();

        System.out.println(user1+"*********************");


    }

}