1 import java.util.Collections;
2 import java.util.LinkedList;
3 import java.util.List;
4
5 public class Test19
6 {
7 public static void main(String[] args)
8 {
9 List list=new LinkedList();//多态
10 for(int i=0;i<9;i++)//循环添加值
11 {
12 list.add("a"+i);
13 }
14 System.out.println(list);
15
16 Collections.shuffle(list);//随机排列
17 System.out.println("随机排列:"+list);
18
19 Collections.sort(list);//升序排列
20 System.out.println("升序排列:"+list);
21
22 Collections.reverse(list);
23 System.out.println("逆序排列:"+list);
24 }
25 }
