java实现List中对象排序的方法

本文实例讲述了java实现list中对象排序的方法。分享给大家供大家参考，具体如下：

package com.test; 
import java.util.arraylist; 
import java.util.collections; 
import java.util.comparator; 
import java.util.list; 
public class newsmanager { 
 /** 
  * @param args 
  */ 
 public static void main(string[] args) { 
  list newss=getnewslist(); 
  for(int i=0;i<newss.size();i++) 
  { 
   news news=(news)newss.get(i); 
   system.out.println("id:"+news.getid()); 
   system.out.println("title:"+news.gettitle()); 
   system.out.println("hits:"+news.gethits()); 
  } 
 } 
 public static list getnewslist() 
 { 
  list list=new arraylist(); 
  news news1=new news(); 
  news1.sethits(1); 
  news1.setid(1); 
  news1.settitle("test1"); 
  list.add(news1); 
  news news2=new news(); 
  news2.sethits(7); 
  news2.setid(2); 
  news2.settitle("test2"); 
  list.add(news2); 
  news news3=new news(); 
  news3.sethits(3); 
  news3.setid(3); 
  news3.settitle("test3"); 
  list.add(news3); 
  news news4=new news(); 
  news4.sethits(5); 
  news4.setid(4); 
  news4.settitle("test4"); 
  list.add(news4); 
  // 按点击数倒序 
  collections.sort(list, new comparator<news>() { 
   public int compare(news arg0, news arg1) { 
    int hits0 = arg0.gethits(); 
    int hits1 = arg1.gethits(); 
    if (hits1 > hits0) { 
     return 1; 
    } else if (hits1 == hits0) { 
     return 0; 
    } else { 
     return -1; 
    } 
   } 
  }); 
  return list; 
 } 
}

希望本文所述对大家java程序设计有所帮助。