利用Collections的shuffle方法，对List重新洗牌排序。

import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class RandomSort {
    public static void main(String[] args) {
        List<String> strList = Arrays.asList("123","abc","aaa","1a1");
        strList.forEach(System.out::println);
        
        System.out.println("------------");
        
        Collections.shuffle(strList);
        strList.forEach(System.out::println);
        
    }
}