package test.collections;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Collections;

import java.util.List;

public class Test01 {

    public static void main(String[] args){

        //Set<String> songs = new HashSet<String>();

        List<String> songs = new ArrayList<String>();

        Collections.addAll(songs, "冷雨夜","海阔天空","love in the rain","海洋");

        //排序

        Collections.sort(songs);

        //随机排序

        Collections.shuffle(songs);

        //倒序

        Collections.reverse(songs);

        //交换顺序

        Collections.swap(songs, 2, 3);

        printList(songs);

    }

    public static void printList(Collection<String> c){

        for(String str:c){

            System.out.println(str);

        }

    }

}