Java 自定义类数组，和比较器；

Comparator 实现

import java.util.*;
public class Main{
    static class Node{
        int v;
        Node(){
            this.v = 0;
        }
        Node(int v){
            this.v = v;
        }
    }
    public static void main(String[] args){

        Node[] ddd = new Node[3];
        Arrays.fill(ddd,new Node());
        ddd[0] = new Node(1);
        ddd[1] = new Node(2);
        ddd[2] = new Node(3);
        Arrays.sort(ddd, 0,3,new Comparator<Node>(){
            public int compare(Node a, Node b){
                return b.v - a.v;}
            });//自定义比较器，return 大于零这表示要交换；
        System.out.println(ddd[2].v);

    }
}

结果为1；

Comparable实现

import java.util.*;
public class Main{
    static class Node implements Comparable<Node>{
        int v;
        Node(){
            this.v = 0;
        }
        Node(int v){
            this.v = v;
        }
        public int compareTo(Node node){
            return node.v - v;
        }
    }
    static int[] prior = new int[100002];
    public static void main(String[] args){

        Node[] ddd = new Node[3];
        Arrays.fill(ddd,new Node());
        ddd[0] = new Node(1);
        ddd[1] = new Node(2);
        ddd[2] = new Node(3);
        Arrays.sort(ddd, 0,3/*,new Comparator<Node>(){
            public int compare(Node a, Node b){
                return b.v - a.v;}
            }*/);
        System.out.println(ddd[2].v);

    }
}
结果为1；