chen-lhx
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 
    } 
    
}

 

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