Comparable接口_对象的排序

package com.yqq.app11;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;

import java.util.Arrays;

/**
 * @Author yqq
 * @Date 2021/11/20 00:47
 * @Version 1.0
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
public class People implements Comparable<People>{
    private int id;

    private String name;

    private int age;

    @Override
    public int compareTo(People o) {
        if(this.age<o.age)
            return -1;
        if(this.age>o.age)
            return 1;
        return 0;
    }

    public static void main(String[] args) {
        People[] ps ={
                new People(1,"科比",24),
                new People(2,"詹姆斯",23),
                new People(3,"杜兰特",35),
                new People(4,"罗斯",1),
                new People(5,"库里",30)};
        System.out.println(Arrays.toString(ps));
        Arrays.sort(ps);
        System.out.println(Arrays.toString(ps));
    }
}

[People(id=1, name=科比, age=24), People(id=2, name=詹姆斯, age=23), People(id=3, name=杜兰特, age=35), People(id=4, name=罗斯, age=1), People(id=5, name=库里, age=30)]
[People(id=4, name=罗斯, age=1), People(id=2, name=詹姆斯, age=23), People(id=1, name=科比, age=24), People(id=5, name=库里, age=30), People(id=3, name=杜兰特, age=35)]