﻿<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>语源科技BlogJava-面向Java</title><link>http://www.blogjava.net/Joyu/</link><description /><language>zh-cn</language><lastBuildDate>Sun, 26 Apr 2026 07:59:37 GMT</lastBuildDate><pubDate>Sun, 26 Apr 2026 07:59:37 GMT</pubDate><ttl>60</ttl><item><title>自己写的类使用TreeSet</title><link>http://www.blogjava.net/Joyu/archive/2006/07/09/57302.html</link><dc:creator>卧云小憩</dc:creator><author>卧云小憩</author><pubDate>Sat, 08 Jul 2006 16:29:00 GMT</pubDate><guid>http://www.blogjava.net/Joyu/archive/2006/07/09/57302.html</guid><wfw:comment>http://www.blogjava.net/Joyu/comments/57302.html</wfw:comment><comments>http://www.blogjava.net/Joyu/archive/2006/07/09/57302.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/Joyu/comments/commentRss/57302.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/Joyu/services/trackbacks/57302.html</trackback:ping><description><![CDATA[自己写的类要能够添加到TreeSet中进行排序，该类需要实现Comparable接口<br /><br /><div style="border: 1px solid rgb(204, 204, 204); padding: 4px 5px 4px 4px; background-color: rgb(238, 238, 238); font-size: 13px; width: 98%;"><!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>--><span style="color: rgb(0, 128, 128);"> 1</span> <span style="color: rgb(0, 0, 255);">class</span><span style="color: rgb(0, 0, 0);"> MyClass </span><span style="color: rgb(0, 0, 255);">implements</span><span style="color: rgb(0, 0, 0);"> Comparable {<br /></span><span style="color: rgb(0, 128, 128);"> 2</span> <span style="color: rgb(0, 0, 0);">    <img src="http://www.blogjava.net/images/dot.gif" /><br /></span><span style="color: rgb(0, 128, 128);"> 3</span> <span style="color: rgb(0, 0, 0);"><br /></span><span style="color: rgb(0, 128, 128);"> 4</span> <span style="color: rgb(0, 0, 0);">    </span><span style="color: rgb(0, 0, 255);">public</span><span style="color: rgb(0, 0, 0);"> </span><span style="color: rgb(0, 0, 255);">int</span><span style="color: rgb(0, 0, 0);"> compareTo(Object o) {<br /></span><span style="color: rgb(0, 128, 128);"> 5</span> <span style="color: rgb(0, 0, 0);">        </span><span style="color: rgb(0, 0, 255);">int</span><span style="color: rgb(0, 0, 0);"> i;<br /></span><span style="color: rgb(0, 128, 128);"> 6</span> <span style="color: rgb(0, 0, 0);">        MyClass mc </span><span style="color: rgb(0, 0, 0);">=</span><span style="color: rgb(0, 0, 0);"> (MyClass)o;<br /></span><span style="color: rgb(0, 128, 128);"> 7</span> <span style="color: rgb(0, 0, 0);">        <img src="http://www.blogjava.net/images/dot.gif" />   </span><span style="color: rgb(0, 128, 0);">//</span><span style="color: rgb(0, 128, 0);">比较</span><span style="color: rgb(0, 128, 0);"><br /></span><span style="color: rgb(0, 128, 128);"> 8</span> <span style="color: rgb(0, 128, 0);"></span><span style="color: rgb(0, 0, 0);">        </span><span style="color: rgb(0, 0, 255);">return</span><span style="color: rgb(0, 0, 0);"> i; </span><span style="color: rgb(0, 128, 0);">//</span><span style="color: rgb(0, 128, 0);">相等为0，大于则i&gt;0，小于i&lt;0</span><span style="color: rgb(0, 128, 0);"><br /></span><span style="color: rgb(0, 128, 128);"> 9</span> <span style="color: rgb(0, 128, 0);"></span><span style="color: rgb(0, 0, 0);">    }<br /></span><span style="color: rgb(0, 128, 128);">10</span> <span style="color: rgb(0, 0, 0);"><br /></span><span style="color: rgb(0, 128, 128);">11</span> <span style="color: rgb(0, 0, 0);">    <img src="http://www.blogjava.net/images/dot.gif" /><br /></span><span style="color: rgb(0, 128, 128);">12</span> <span style="color: rgb(0, 0, 0);">}</span></div><br /><br />或者，另写一个类实现Comparator，然后初始化TreeSet时，new TreeSet(new MyComparator())<br /><br /><div style="border: 1px solid rgb(204, 204, 204); padding: 4px 5px 4px 4px; background-color: rgb(238, 238, 238); font-size: 13px; width: 98%;"><!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>--><span style="color: rgb(0, 128, 128);"> 1</span> <span style="color: rgb(0, 0, 255);">public</span><span style="color: rgb(0, 0, 0);"> </span><span style="color: rgb(0, 0, 255);">class</span><span style="color: rgb(0, 0, 0);"> MyComparator </span><span style="color: rgb(0, 0, 255);">implements</span><span style="color: rgb(0, 0, 0);"> Comparator {<br /></span><span style="color: rgb(0, 128, 128);"> 2</span> <span style="color: rgb(0, 0, 0);"><br /></span><span style="color: rgb(0, 128, 128);"> 3</span> <span style="color: rgb(0, 0, 0);">    </span><span style="color: rgb(0, 0, 255);">public</span><span style="color: rgb(0, 0, 0);"> </span><span style="color: rgb(0, 0, 255);">int</span><span style="color: rgb(0, 0, 0);"> compare(Object o1, Object o2) {<br /></span><span style="color: rgb(0, 128, 128);"> 4</span> <span style="color: rgb(0, 0, 0);">        </span><span style="color: rgb(0, 0, 255);">int</span><span style="color: rgb(0, 0, 0);"> i;<br /></span><span style="color: rgb(0, 128, 128);"> 5</span> <span style="color: rgb(0, 0, 0);">        MyClass mc1 </span><span style="color: rgb(0, 0, 0);">=</span><span style="color: rgb(0, 0, 0);"> (MyClass)o1;<br /></span><span style="color: rgb(0, 128, 128);"> 6</span> <span style="color: rgb(0, 0, 0);">        MyClass mc2 </span><span style="color: rgb(0, 0, 0);">=</span><span style="color: rgb(0, 0, 0);"> (MyClass)o2;<br /></span><span style="color: rgb(0, 128, 128);"> 7</span> <span style="color: rgb(0, 0, 0);">        <img src="http://www.blogjava.net/images/dot.gif" />  </span><span style="color: rgb(0, 128, 0);">//</span><span style="color: rgb(0, 128, 0);">比较</span><span style="color: rgb(0, 128, 0);"><br /></span><span style="color: rgb(0, 128, 128);"> 8</span> <span style="color: rgb(0, 128, 0);"></span><span style="color: rgb(0, 0, 0);">        </span><span style="color: rgb(0, 0, 255);">return</span><span style="color: rgb(0, 0, 0);"> i;<br /></span><span style="color: rgb(0, 128, 128);"> 9</span> <span style="color: rgb(0, 0, 0);">    }<br /></span><span style="color: rgb(0, 128, 128);">10</span> <span style="color: rgb(0, 0, 0);"><br /></span><span style="color: rgb(0, 128, 128);">11</span> <span style="color: rgb(0, 0, 0);">}</span></div><br /><img src ="http://www.blogjava.net/Joyu/aggbug/57302.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/Joyu/" target="_blank">卧云小憩</a> 2006-07-09 00:29 <a href="http://www.blogjava.net/Joyu/archive/2006/07/09/57302.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>开源对象数据库db4o</title><link>http://www.blogjava.net/Joyu/archive/2006/06/19/53809.html</link><dc:creator>卧云小憩</dc:creator><author>卧云小憩</author><pubDate>Mon, 19 Jun 2006 08:13:00 GMT</pubDate><guid>http://www.blogjava.net/Joyu/archive/2006/06/19/53809.html</guid><wfw:comment>http://www.blogjava.net/Joyu/comments/53809.html</wfw:comment><comments>http://www.blogjava.net/Joyu/archive/2006/06/19/53809.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/Joyu/comments/commentRss/53809.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/Joyu/services/trackbacks/53809.html</trackback:ping><description><![CDATA[<a target="_blank" class="" title="db4o" href="http://www.db4o.com">db4o</a>是一个开源的对象数据库管理系统，从官方的基准测试来看，性能很不错。<br /><a href="http://www.db4o.com"></a><br />具体的可以看看rosen<span style="text-decoration: underline;"></span>的<a href="/rosen/archive/2006/06/15/53094.html">db4o之旅</a>。<br /><img src ="http://www.blogjava.net/Joyu/aggbug/53809.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/Joyu/" target="_blank">卧云小憩</a> 2006-06-19 16:13 <a href="http://www.blogjava.net/Joyu/archive/2006/06/19/53809.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>