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

 import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;

 public class Test {

      List list  =   new  LinkedList();
      public   static   void  main(String[] args)  {
         List list  =   new  LinkedList();
          for  ( int  i  =   0 ; i  <   9 ; i ++ )  {
             list.add( " a " + i);
         }
         Collections.sort(list); // 顺序排列
         System.out.println(list);

         Collections.shuffle(list); // 混乱的意思
         System.out.println(list);

         Collections.reverse(list); // 倒序排列
         System.out.println(list);

         System.out.println(Collections.binarySearch(list,  " a5 " )); // 折半查找
     } 

 }