java中两种数组排序的方法

package com.Test.Demo.Test;

import java.util.Arrays;
import java.util.Comparator;

public class SortTest {
    public static void main(String[] args){
        Ren1[] r1={new Ren1(123,"qwe"),new Ren1(99,"uio"),new Ren1(150,"tuu")};
        Arrays.sort(r1,new bi()); //两种比较器同时存在，外部比较器生效
        for(Ren1 t:r1){//降序
            System.out.println(t);
        }
    }
}
class bi implements Comparator<Ren1>{ //外部比较器 实现比较规则

    @Override
    public int compare(Ren1 o1, Ren1 o2) {
        return o2.getScore()-o1.getScore();
    }
}
class Ren1 implements Comparable<Ren1> { //内部比较器
    private int score;
    private String name;

    public Ren1(int score, String name) {
        this.score = score;
        this.name = name;
    }

    public int getScore() {
        return score;
    }

    public String getName() {
        return name;
    }



    @Override
    public String toString() {
        return "Ren1{" +
                "score=" + score +
                ", name='" + name + '\'' +
                '}';
    }

    @Override
    public int compareTo(Ren1 o) {
        return o.getScore()-this.getScore();
    }
}