﻿<?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-superman</title><link>http://www.blogjava.net/yuezt/</link><description /><language>zh-cn</language><lastBuildDate>Thu, 07 May 2026 00:47:37 GMT</lastBuildDate><pubDate>Thu, 07 May 2026 00:47:37 GMT</pubDate><ttl>60</ttl><item><title>[java] switch (String) 的使用</title><link>http://www.blogjava.net/yuezt/archive/2011/10/27/362149.html</link><dc:creator>yuezt</dc:creator><author>yuezt</author><pubDate>Thu, 27 Oct 2011 02:02:00 GMT</pubDate><guid>http://www.blogjava.net/yuezt/archive/2011/10/27/362149.html</guid><wfw:comment>http://www.blogjava.net/yuezt/comments/362149.html</wfw:comment><comments>http://www.blogjava.net/yuezt/archive/2011/10/27/362149.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.blogjava.net/yuezt/comments/commentRss/362149.html</wfw:commentRss><trackback:ping>http://www.blogjava.net/yuezt/services/trackbacks/362149.html</trackback:ping><description><![CDATA[switch能够使类似if-else的判断变得简明，但java中switch()不支持string，（jdk1.7支持）。<br />
使用枚举可以弥补这一缺憾。<br />
<div><div style="background-color:#eeeeee;font-size:13px;border:1px solid #CCCCCC;padding-right: 5px;padding-bottom: 4px;padding-left: 4px;padding-top: 4px;width: 98%;word-break:break-all"><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #008080; ">&nbsp;1</span>&nbsp;<span style="color: #0000FF; ">public</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">class</span><span style="color: #000000; ">&nbsp;SwitchTest{<br /></span><span style="color: #008080; ">&nbsp;2</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000FF; ">public</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">enum</span><span style="color: #000000; ">&nbsp;Animal{<br /></span><span style="color: #008080; ">&nbsp;3</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dog,cat,mouse;<br /></span><span style="color: #008080; ">&nbsp;4</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000FF; ">public</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">static</span><span style="color: #000000; ">&nbsp;Animal&nbsp;getAnimalType(String&nbsp;animal){<br /></span><span style="color: #008080; ">&nbsp;5</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000FF; ">return</span><span style="color: #000000; ">&nbsp;valueOf(animal.toLowerCase());<br /></span><span style="color: #008080; ">&nbsp;6</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br /></span><span style="color: #008080; ">&nbsp;7</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;}<br /></span><span style="color: #008080; ">&nbsp;8</span>&nbsp;<span style="color: #000000; "><br /></span><span style="color: #008080; ">&nbsp;9</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000FF; ">public</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">static</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">void</span><span style="color: #000000; ">&nbsp;main(String[]&nbsp;args){<br /></span><span style="color: #008080; ">10</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;selectAnimal(</span><span style="color: #000000; ">"</span><span style="color: #000000; ">cat</span><span style="color: #000000; ">"</span><span style="color: #000000; ">);<br /></span><span style="color: #008080; ">11</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;}<br /></span><span style="color: #008080; ">12</span>&nbsp;<span style="color: #000000; "><br /></span><span style="color: #008080; ">13</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000FF; ">public</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">static</span><span style="color: #000000; ">&nbsp;</span><span style="color: #0000FF; ">void</span><span style="color: #000000; ">&nbsp;selectAnimal(String&nbsp;animal){<br /></span><span style="color: #008080; ">14</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000FF; ">switch</span><span style="color: #000000; ">(Animal.getAnimalType(animal)){<br /></span><span style="color: #008080; ">15</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000FF; ">case</span><span style="color: #000000; ">&nbsp;cat:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br /></span><span style="color: #008080; ">16</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(</span><span style="color: #000000; ">"</span><span style="color: #000000; ">this&nbsp;is&nbsp;a&nbsp;cat</span><span style="color: #000000; ">"</span><span style="color: #000000; ">);<br /></span><span style="color: #008080; ">17</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000FF; ">break</span><span style="color: #000000; ">;<br /></span><span style="color: #008080; ">18</span>&nbsp;<span style="color: #000000; "><br /></span><span style="color: #008080; ">19</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000FF; ">case</span><span style="color: #000000; ">&nbsp;dog:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br /></span><span style="color: #008080; ">20</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(</span><span style="color: #000000; ">"</span><span style="color: #000000; ">this&nbsp;is&nbsp;a&nbsp;dog</span><span style="color: #000000; ">"</span><span style="color: #000000; ">);<br /></span><span style="color: #008080; ">21</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000FF; ">break</span><span style="color: #000000; ">;<br /></span><span style="color: #008080; ">22</span>&nbsp;<span style="color: #000000; "><br /></span><span style="color: #008080; ">23</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000FF; ">case</span><span style="color: #000000; ">&nbsp;mouse:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br /></span><span style="color: #008080; ">24</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(</span><span style="color: #000000; ">"</span><span style="color: #000000; ">this&nbsp;is&nbsp;a&nbsp;mouse</span><span style="color: #000000; ">"</span><span style="color: #000000; ">);<br /></span><span style="color: #008080; ">25</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000FF; ">break</span><span style="color: #000000; ">;<br /></span><span style="color: #008080; ">26</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br /></span><span style="color: #008080; ">27</span>&nbsp;<span style="color: #000000; ">&nbsp;&nbsp;&nbsp;&nbsp;}<br /></span><span style="color: #008080; ">28</span>&nbsp;<span style="color: #000000; ">}</span></div></div><img src ="http://www.blogjava.net/yuezt/aggbug/362149.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.blogjava.net/yuezt/" target="_blank">yuezt</a> 2011-10-27 10:02 <a href="http://www.blogjava.net/yuezt/archive/2011/10/27/362149.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>