Java洗牌算法Collections.shuffle

Java洗牌算法Collections.shuffle

package com.example.core.mydemo.javaDemo;

import java.util.ArrayList;
import java.util.Collections;

/**
 * 随机打乱  洗牌算法用于随机打乱一个集合中元素的顺序。
 * 打乱前：[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
 * 打乱后：[1, 9, 2, 10, 8, 3, 5, 6, 7, 4]
 */
public class ShuffleExample {
    public static void main(String[] args) {
        ArrayList<Integer> list = new ArrayList<>();
        for (int i = 1; i <= 10; i++) {
            list.add(i);
        }
        System.out.println("打乱前：" + list);
        Collections.shuffle(list);
        System.out.println("打乱后：" + list);
    }

}