[Java] Collections的简单运用

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);
        }
    }
}