<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[hanyij的专栏]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/hanyij</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; hanyij]]></copyright><item><title><![CDATA[给自己创建的对象排序]]></title><link>https://blog.youkuaiyun.com/hanyij/article/details/5140840</link><guid>https://blog.youkuaiyun.com/hanyij/article/details/5140840</guid><author>hanyij</author><pubDate>Wed, 06 Jan 2010 11:00:00 +0800</pubDate><description><![CDATA[package han;import java.util.Arrays;import java.util.Comparator;//	自己创建的Person类class Person{	private long id;	public Person(long id){		this.id=id;	}	public long getId(){		return id]]></description><category></category></item><item><title><![CDATA[在组合与继承之间选择 ]]></title><link>https://blog.youkuaiyun.com/hanyij/article/details/5063364</link><guid>https://blog.youkuaiyun.com/hanyij/article/details/5063364</guid><author>hanyij</author><pubDate>Wed, 23 Dec 2009 16:17:00 +0800</pubDate><description><![CDATA[    组合是简单的把对象引用至于新类。比如class House{    private Window w=new Window();    private Door d=new Door();}class Window{}class Door{    }    继承是Java语言不可缺少的组成部分。当创建一个类时，总是存在继承（Objec]]></description><category></category></item><item><title><![CDATA[Java日期类常用方法]]></title><link>https://blog.youkuaiyun.com/hanyij/article/details/5055719</link><guid>https://blog.youkuaiyun.com/hanyij/article/details/5055719</guid><author>hanyij</author><pubDate>Tue, 22 Dec 2009 14:40:00 +0800</pubDate><description><![CDATA[1.将日期存入Date对象SimpleDateFormat是一个日期格式化类。yyyy，MM，dd，HH，mm,ss,SSS分别表示年，月，日，时，分，秒，毫秒。可以将他们随意组合，构建自己的日期格式。SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SSS");然后只需要将符合日期格式的日期字符串]]></description><category></category></item></channel></rss>