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  • java中对List中对象排序实现

    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;
    	}
    
    }
    


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  • 原文地址:https://www.cnblogs.com/javawebsoa/p/3106718.html
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