Java中对List集合内的元素进行顺序、倒序、随机排序的示例代码

 1 import java.util.Collections;
 2 import java.util.LinkedList;
 3 import java.util.List;
 4 
 5 public class Test {
 6 
 7      List list  =   new  LinkedList();
 8      public   static   void  main(String[] args)  {
 9         List list  =   new  LinkedList();
10          for  ( int  i  =   0 ; i  <   9 ; i ++ )  {
11             list.add( " a " + i);
12         } 
13         Collections.sort(list); // 顺序排列 
14         System.out.println(list);
15         
16         Collections.shuffle(list); // 混乱的意思 
17         System.out.println(list);
18         
19         Collections.reverse(list); // 倒序排列 
20         System.out.println(list);
21         
22         System.out.println(Collections.binarySearch(list,  " a5 " )); // 折半查找 
23     } 
24     
25 }