java实现List中对象排序的方法
内容摘要
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
package com.test;
import java.util.ArrayList;
import java.util.Collections;
import
文章正文
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:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | 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。
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