�??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>&#22269;&#20135;&#31934;&#21697;&#36229;&#30896;&#44;&#22269;&#20135;&#31934;&#21697;&#26085;&#26412;&#44;&#119;&#119;&#119;&#46;&#25104;&#20154;&#46;&#99;&#111;&#109;</title><link>http://www.aygfsteel.com/lijun/</link><description>java,java</description><language>zh-cn</language><lastBuildDate>Tue, 17 Jun 2025 20:43:31 GMT</lastBuildDate><pubDate>Tue, 17 Jun 2025 20:43:31 GMT</pubDate><ttl>60</ttl><item><title> veloeclipse   eclipse 4.4不兼容该插�g</title><link>http://www.aygfsteel.com/lijun/archive/2014/08/21/417184.html</link><dc:creator>键盘动物</dc:creator><author>键盘动物</author><pubDate>Thu, 21 Aug 2014 03:24:00 GMT</pubDate><guid>http://www.aygfsteel.com/lijun/archive/2014/08/21/417184.html</guid><wfw:comment>http://www.aygfsteel.com/lijun/comments/417184.html</wfw:comment><comments>http://www.aygfsteel.com/lijun/archive/2014/08/21/417184.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/lijun/comments/commentRss/417184.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/lijun/services/trackbacks/417184.html</trackback:ping><description><![CDATA[<div style="word-wrap: break-word; color: #666666; font-family: 宋体, Arial; font-size: 16px; line-height: 26px; background-color: #ffffff;"><span style="word-wrap: break-word; color: #ff9900;">//vm 模板</span></div><div style="word-wrap: break-word; color: #666666; font-family: 宋体, Arial; font-size: 16px; line-height: 26px; background-color: #ffffff;"><span style="word-wrap: break-word; color: #ff9900;"><span style="word-wrap: break-word; color: #0000ff;"><a  target="_blank" style="word-wrap: break-word; text-decoration: none; color: #565656;">http://veloeclipse.googlecode.com/svn/trunk/update/<br style="word-wrap: break-word;" /></a>eclipse 4.4不兼容该插�g<br style="word-wrap: break-word;" /><a  target="_blank" style="word-wrap: break-word; text-decoration: none; color: #565656;"></a><span style="word-wrap: break-word;">eclipse 4.4的vm新插�Ӟ��</span>http://plugin.tqlab.com/eclipse/velocityeditor/update/</span></span></div><img src ="http://www.aygfsteel.com/lijun/aggbug/417184.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/lijun/" target="_blank">键盘动物</a> 2014-08-21 11:24 <a href="http://www.aygfsteel.com/lijun/archive/2014/08/21/417184.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>老版本的jdk下蝲</title><link>http://www.aygfsteel.com/lijun/archive/2014/08/21/417179.html</link><dc:creator>键盘动物</dc:creator><author>键盘动物</author><pubDate>Thu, 21 Aug 2014 01:52:00 GMT</pubDate><guid>http://www.aygfsteel.com/lijun/archive/2014/08/21/417179.html</guid><wfw:comment>http://www.aygfsteel.com/lijun/comments/417179.html</wfw:comment><comments>http://www.aygfsteel.com/lijun/archive/2014/08/21/417179.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/lijun/comments/commentRss/417179.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/lijun/services/trackbacks/417179.html</trackback:ping><description><![CDATA[<div>http://www.oracle.com/technetwork/java/archive-139210.html</div><img src ="http://www.aygfsteel.com/lijun/aggbug/417179.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/lijun/" target="_blank">键盘动物</a> 2014-08-21 09:52 <a href="http://www.aygfsteel.com/lijun/archive/2014/08/21/417179.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>jvm之java源码�~�译机制</title><link>http://www.aygfsteel.com/lijun/archive/2014/08/08/416748.html</link><dc:creator>键盘动物</dc:creator><author>键盘动物</author><pubDate>Fri, 08 Aug 2014 11:31:00 GMT</pubDate><guid>http://www.aygfsteel.com/lijun/archive/2014/08/08/416748.html</guid><wfw:comment>http://www.aygfsteel.com/lijun/comments/416748.html</wfw:comment><comments>http://www.aygfsteel.com/lijun/archive/2014/08/08/416748.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/lijun/comments/commentRss/416748.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/lijun/services/trackbacks/416748.html</trackback:ping><description><![CDATA[javap -g &nbsp;Foo.java &nbsp; (-g 生成行号)<br /><div>javap -c &nbsp;-s -l -verbose Foo</div><img src ="http://www.aygfsteel.com/lijun/aggbug/416748.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/lijun/" target="_blank">键盘动物</a> 2014-08-08 19:31 <a href="http://www.aygfsteel.com/lijun/archive/2014/08/08/416748.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>java 自动装箱与拆��?引发的血�?/title><link>http://www.aygfsteel.com/lijun/archive/2014/08/08/416736.html</link><dc:creator>键盘动物</dc:creator><author>键盘动物</author><pubDate>Fri, 08 Aug 2014 07:32:00 GMT</pubDate><guid>http://www.aygfsteel.com/lijun/archive/2014/08/08/416736.html</guid><wfw:comment>http://www.aygfsteel.com/lijun/comments/416736.html</wfw:comment><comments>http://www.aygfsteel.com/lijun/archive/2014/08/08/416736.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/lijun/comments/commentRss/416736.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/lijun/services/trackbacks/416736.html</trackback:ping><description><![CDATA[<span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; color: red; background-color: #f7fcff;">装箱�Q�从基本�c�d��转换成Object�c�d���Q�称之�ؓ装箱�Q?/span><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; color: #339966; background-color: #f7fcff;">***拆箱�Q�从Object转换乘基本类型的操作�Q�称之�ؓ拆箱�?�q�个操作在反���过�E�中用的比较的多�?nbsp;</span><br style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #f7fcff;" /><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; color: #ff0000; background-color: #f7fcff;">装箱�Q�在堆中建立一个Object实例�Q�把你指定的值复制成�?/span><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #f7fcff;">�Q?/span><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; color: #339966; background-color: #f7fcff;">***拆箱�Q�判别引用指向的堆中信息是否是要拆成的类型，是取出堆中值送给栈中变量�Q�否则报异常&nbsp;</span><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #ddedfb;"><br />//�?128~127 之外的数&nbsp;</span><br style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px;" /><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #ddedfb;">Integer num1 = 297; Integer num2 = 297;&nbsp;</span><br style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px;" /><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #ddedfb;">System.out.println("num1==num2: "+(num1==num2));&nbsp;</span><br style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px;" /><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #ddedfb;">// �?128~127 之内的数&nbsp;</span><br style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px;" /><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #ddedfb;">Integer num3 = 97; Integer num4 = 97;&nbsp;</span><br style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px;" /><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #ddedfb;">System.out.println("num3==num4: "+(num3==num4)); 打印的结果是�Q�num1==num2: false num3==num4: true&nbsp;<br /></span><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #f7fcff;">很奇怪吧�Q�这���归�l�于java对于Integer与int的自动装��׃��拆箱的设计，是一�U�模式：叫��n元模式（flyweight�Q?nbsp;</span><br style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #f7fcff;" /><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; color: #ff0000; background-color: #f7fcff;">��Z��加大对简单数字的重利用，java定义�Q�在自动装箱时对于��g��&#8211;128�?27之间的��|��它们被装��׃ؓInteger对象后，会存在内存中被重用，始终只存在一个对�?nbsp;</span><br style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #f7fcff;" /><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; color: #339966; background-color: #f7fcff;"><strong>而如果超�q�了�?#8211;128�?27之间的��|��被装���后的Integer对象�q�不会被重用�Q�即相当于每�ơ装���时都新��Z���?Integer对象�Q?/strong></span><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #f7fcff;">明白了吧&nbsp;&nbsp;</span><br style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #f7fcff;" /><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #f7fcff;">以上的现象是�׃��使用了自动装���所引�v的，如果你没有��用自动装���，而是跟一般类一��P��用new来进行实例化�Q�就会每�ơnew���都一个新的对象；&nbsp;</span><br /><span style="font-family: Tahoma, Helvetica, Arial, 宋体, sans-serif; line-height: 25.200000762939453px; background-color: #ddedfb;"><br /></span><img src ="http://www.aygfsteel.com/lijun/aggbug/416736.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/lijun/" target="_blank">键盘动物</a> 2014-08-08 15:32 <a href="http://www.aygfsteel.com/lijun/archive/2014/08/08/416736.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Java泛型面试�?/title><link>http://www.aygfsteel.com/lijun/archive/2014/08/08/416734.html</link><dc:creator>键盘动物</dc:creator><author>键盘动物</author><pubDate>Fri, 08 Aug 2014 07:14:00 GMT</pubDate><guid>http://www.aygfsteel.com/lijun/archive/2014/08/08/416734.html</guid><wfw:comment>http://www.aygfsteel.com/lijun/comments/416734.html</wfw:comment><comments>http://www.aygfsteel.com/lijun/archive/2014/08/08/416734.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/lijun/comments/commentRss/416734.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/lijun/services/trackbacks/416734.html</trackback:ping><description><![CDATA[<h2><br /></h2><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>1. Java中的泛型是什�?? 使用泛型的好处是什�?</strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　�q�是在各�U�Java泛型面试中，一开��Z����׃��被问到的问题中的一个，主要集中在初�U�和中��面试中。那些拥有Java1.4或更早版本的开发背景的人都知道�Q?a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">在集合中存储对象</a>�q�在使用前进行类型�{换是多么的不方便。泛型防止了那种情况的发生。它提供了编译期的类型安全，���保你只能把正确�c�d��的对象放入集合中�Q�避免了在运行时出现ClassCastException�?/p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>2. Java的泛型是如何工作�?? 什么是�c�d��擦除 ?</strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　�q�是一道更好的泛型面试题。泛型是通过�c�d��擦除来实现的�Q�编译器在编译时擦除了所有类型相关的信息�Q�所以在�q�行时不存在��M���c�d��相关的信息。例如List&lt;String&gt;在运行时仅用一�?a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">List</a>来表�C�。这样做的目的，是确保能和Java 5之前的版本开发二�q�制�c�d���q�行兼容。你无法在运行时讉K��到类型参敎ͼ�因�ؓ�~�译器已�l�把泛型�c�d��转换成了原始�c�d��。根据你对这个泛型问题的回答情况�Q�你会得��C��些后�l�提问，比如��Z��么泛型是��q��型擦除来实现的或者给你展�C�Z��些会��D���~�译器出错的错误泛型代码。请阅读我的<a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">Java中泛型是如何工作�?/a>来了解更多信息�?/p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>3. 什么是泛型中的限定通配�W�和非限定通配�W??</strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　�q�是另一个非�?a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">���行的Java泛型面试�?/a>。限定通配�W�对�c�d���q�行了限制。有两种限定通配�W�，一�U�是&lt;? extends T&gt;它通过���保�c�d��必须是T的子�c�L��讑֮��c�d��的上界，另一�U�是&lt;? super T&gt;它通过���保�c�d��必须是T的父�c�L��讑֮��c�d��的下界。泛型类型必��ȝ��限定内的�c�d��来进行初始化�Q�否则会��D���~�译错误。另一斚w��&lt;?&gt;表示了非限定通配�W�，因�ؓ&lt;?&gt;可以用�Q意类型来替代。更多信息请参阅我的文章<a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">泛型中限定通配�W�和非限定通配�W�之间的区别</a>�?/p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>4. List&lt;? extends T&gt;和List &lt;? super T&gt;之间有什么区�??</strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　�q�和上一个面试题有联�p�，有时面试官会用这个问题来评估你对泛型的理解，而不是直接问你什么是限定通配�W�和非限定通配�W�。这两个List的声明都�?a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">限定通配�W�的例子</a>�Q�List&lt;? extends T&gt;可以接受��M���l�承自T的类型的List�Q�而List&lt;? super T&gt;可以接受��M��T的父�c�L��成的List。例如List&lt;? extends Number&gt;可以接受List&lt;Integer&gt;或List&lt;Float&gt;。在本段出现的连接中可以扑ֈ�更多信息�?/p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>5. 如何�~�写一个泛型方法，让它能接受泛型参数�ƈ�q�回泛型�c�d��?</strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　�~�写泛型�Ҏ���q�不困难�Q�你需要用泛型�c�d��来替代原始类型，比如使用T, E or K,V�{�被�q�泛认可的类型占位符。泛型方法的例子请参�?a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">Java集合�c�L���?/a>。最���单的情况下，一个泛型方法可能会像这�?</p><pre style="margin-top: 8px; margin-bottom: 8px; padding: 8px; font-family: Arial; border: 1px solid #cccccc; color: #555555; line-height: 23.799999237060547px; background: #f3f3f3;">public V put(K key, V value) {         return cache.put(key, value); } </pre><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>6. Java中如何��用泛型编写带有参数的�c?</strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　�q�是上一道面试题的�g伸。面试官可能会要求你用泛型编写一个类型安全的�c�，而不是编写一个泛型方法。关键仍然是使用泛型�c�d��来代替原始类型，而且要��用JDK中采用的标准占位�W��?/p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>7. �~�写一�D�|��型程序来实现LRU�~�存?</strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　对于喜欢<a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">Java�~�程</a>的�h来说�q�相当于是一�ơ练习。给你个提示�Q�LinkedHashMap可以用来实现固定大小的LRU�~�存�Q�当LRU�~�存已经满了的时候，它会把最老的键值对�U�d���~�存。LinkedHashMap提供了一个称为removeEldestEntry()的方法，该方法会被put()和putAll()调用来删除最老的键值对。当�Ӟ��如果你已�l�编写了一个可�q�行�?a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">JUnit���试</a>�Q�你也可以随意编写你自己的实��C��码�?/p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>8. 你可以把List&lt;String&gt;传递给一个接受List&lt;Object&gt;参数的方法吗�Q?/strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　对�Q何一个不太熟悉泛型的人来��_���q�个Java泛型题目看�v来��o人疑惑，因�ؓ乍看��h��String是一�U�Object�Q�所以List&lt;String&gt;应当可以用在需要List&lt;Object&gt;的地方，但是事实�q����如此。真�q�样做的话会��D���~�译错误。如果你再深一步考虑�Q�你会发现Java�q�样做是有意义的�Q�因为List&lt;Object&gt;可以存储��M���c�d��的对象包�?a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">String, Integer</a>�{�等�Q�而List&lt;String&gt;却只能用来存储Strings�?/p><pre style="margin-top: 8px; margin-bottom: 8px; padding: 8px; font-family: Arial; border: 1px solid #cccccc; color: #555555; line-height: 23.799999237060547px; background: #f3f3f3;">List&lt;Object&gt; objectList; List&lt;String&gt; stringList;       objectList = stringList;  //compilation error incompatible types</pre><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>9. Array中可以用泛型�?</strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　�q�可能是Java泛型面试题中最���单的一个了�Q�当然前提是你要知道Array事实上�ƈ不支持泛型，�q�也是�ؓ什么Joshua Bloch�?a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">Effective Java</a>一书中�����使用List来代替Array�Q�因为List可以提供�~�译期的�c�d��安全保证�Q�而Array却不能�?/p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>10. 如何��L��Java中的�c�d��未检查的警告?</strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　如果你把泛型和原始类型�؜合�v来��用，例如下列代码�Q�Java 5的javac�~�译器会产生�c�d��未检查的警告�Q�例�?/p><pre style="margin-top: 8px; margin-bottom: 8px; padding: 8px; font-family: Arial; border: 1px solid #cccccc; color: #555555; line-height: 23.799999237060547px; background: #f3f3f3;">List&lt;String&gt; rawList = new ArrayList() 注意: Hello.java使用了未���查或�U�Cؓ不安全的操作; </pre><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　�q�种警告可以使用@SuppressWarnings("unchecked")注解来屏蔽�?/p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>Java泛型面试题补充更�?</strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　我手头又拿到了几个Java泛型面试题跟大家分��n下，�q�几道题集中在泛型类型和原始�c�d��的区别上�Q�以及我们是否可以用Object来代曉K��定通配�W�的使用�{�等�Q?/p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>Java中List&lt;Object&gt;和原始类型List之间的区�?</strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　原始�c�d��和带参数�c�d��&lt;Object&gt;之间的主要区别是�Q�在�~�译�?a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">�~�译�?/a>不会对原始类型进行类型安全检查，却会对带参数的类型进行检查，通过使用Object作�ؓ�c�d���Q�可以告知编译器该方法可以接受�Q何类型的对象�Q�比如String或Integer。这道题的考察点在于对泛型中原始类型的正确理解。它们之间的�W�二点区别是�Q�你可以把�Q何带参数的类型传递给原始�c�d��List�Q�但却不能把List&lt;String&gt;传递给接受List&lt;Object&gt;的方法，因�ؓ会��生变异错误。更多详�l�信息请参阅<a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">Java中的泛型是如何工作的</a>�?/p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>Java中List&lt;?&gt;和List&lt;Object&gt;之间的区别是什�?</strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　�q�道题跟上一道题看�v来很像，实质上却完全不同。List&lt;?&gt;&nbsp;是一个未知类型的List�Q�而List&lt;Object&gt;其实是�Q意类型的List。你可以把List&lt;String&gt;, List&lt;Integer&gt;赋值给List&lt;?&gt;�Q�却不能把List&lt;String&gt;赋值给List&lt;Object&gt;�?nbsp; &nbsp; &nbsp;</p><pre style="margin-top: 8px; margin-bottom: 8px; padding: 8px; font-family: Arial; border: 1px solid #cccccc; color: #555555; line-height: 23.799999237060547px; background: #f3f3f3;">List&lt;?&gt; listOfAnyType; List&lt;Object&gt; listOfObject = new ArrayList&lt;Object&gt;(); List&lt;String&gt; listOfString = new ArrayList&lt;String&gt;(); List&lt;Integer&gt; listOfInteger = new ArrayList&lt;Integer&gt;();       listOfAnyType = listOfString; //legal listOfAnyType = listOfInteger; //legal listOfObjectType = (List&lt;Object&gt;) listOfString; //compiler error - in-convertible types </pre><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　想了解更多关于通配�W�的信息��h���?a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">Java中的泛型通配�W�示�?/a></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　<strong>List&lt;String&gt;和原始类型List之间的区�?</strong></p><p style="margin: 10px 0px; padding: 0px; color: #555555; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 23.799999237060547px; background-color: #f9f9f9;">　　该题�c�M���?#8220;原始�c�d��和带参数�c�d��之间有什么区�?#8221;。带参数�c�d��是类型安全的�Q�而且其类型安全是��q��译器保证的，�?a  rel="nofollow" style="color: #0d4ac6; text-decoration: none;">原始�c�d��List却不是类型安全的</a>。你不能把String之外的�Q何其它类型的Object存入String�c�d��的List中，而你可以把�Q何类型的对象存入原始List中。��用泛型的带参数类型你不需要进行类型�{换，但是对于原始�c�d���Q�你则需要进行显式的�c�d��转换�?/p><pre style="margin-top: 8px; margin-bottom: 8px; padding: 8px; font-family: Arial; border: 1px solid #cccccc; color: #555555; line-height: 23.799999237060547px; background: #f3f3f3;">List listOfRawTypes = new ArrayList(); listOfRawTypes.add("abc"); listOfRawTypes.add(123); //�~�译器允许这�?- �q�行时却会出现异�?String item = (String) listOfRawTypes.get(0); //需要显式的�c�d��转换 item = (String) listOfRawTypes.get(1); //抛ClassCastException�Q�因为Integer不能被�{换�ؓString       List&lt;String&gt; listOfString = new ArrayList(); listOfString.add("abcd"); listOfString.add(1234); //�~�译错误�Q�比在运行时抛异常要�?item = listOfString.get(0); //不需要显式的�c�d��转换 - �~�译器自动�{�?</pre><img src ="http://www.aygfsteel.com/lijun/aggbug/416734.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/lijun/" target="_blank">键盘动物</a> 2014-08-08 15:14 <a href="http://www.aygfsteel.com/lijun/archive/2014/08/08/416734.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>泛型的好�?/title><link>http://www.aygfsteel.com/lijun/archive/2014/08/08/416730.html</link><dc:creator>键盘动物</dc:creator><author>键盘动物</author><pubDate>Fri, 08 Aug 2014 06:57:00 GMT</pubDate><guid>http://www.aygfsteel.com/lijun/archive/2014/08/08/416730.html</guid><wfw:comment>http://www.aygfsteel.com/lijun/comments/416730.html</wfw:comment><comments>http://www.aygfsteel.com/lijun/archive/2014/08/08/416730.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/lijun/comments/commentRss/416730.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/lijun/services/trackbacks/416730.html</trackback:ping><description><![CDATA[<p style="margin: 0px; padding: 0px; font-family: Arial; line-height: 26px; background-color: #ffffff;">Java 语言中引入泛型是一个较大的功能增强。不仅语�a�、类型系�l�和�~�译器有了较大的变化�Q�以支持泛型�Q�而且�c�d��也进行了大翻修，所以许多重要的�c�，比如集合框架�Q�都已经成�ؓ泛型化的了�?/p><p style="margin: 0px; padding: 0px; font-family: Arial; line-height: 26px; background-color: #ffffff;">�q�带来了很多好处�Q?br /><br /><strong>1�Q�类型安全�?/strong>&nbsp;泛型的主要目标是提高 Java �E�序的类型安全。通过知道使用泛型定义的变量的�c�d��限制�Q�编译器可以在一个高得多的程度上验证�c�d��假设。没有泛型，�q�些假设���只存在于程序员的头脑中�Q�或者如果幸�q�的话，�q�存在于代码注释中）�?/p><p style="margin: 0px; padding: 0px; font-family: Arial; line-height: 26px; background-color: #ffffff;">&nbsp;</p><p style="margin: 0px; padding: 0px; font-family: Arial; line-height: 26px; background-color: #ffffff;"><strong>2�Q�消除强制类型�{换�?/strong>&nbsp;泛型的一个附带好处是�Q�消除源代码中的许多强制�c�d��转换。这使得代码更加可读�Q��ƈ且减���了出错��Z���?/p><p style="margin: 0px; padding: 0px; font-family: Arial; line-height: 26px; background-color: #ffffff;">&nbsp;</p><p style="margin: 0px; padding: 0px; font-family: Arial; line-height: 26px; background-color: #ffffff;"><strong>3�Q�潜在的性能收益�?/strong>&nbsp;泛型�����大的优化带来可能。在泛型的初始实��C���Q�编译器���强制类型�{换（没有泛型的话�Q�程序员会指定这些强制类型�{换）插入生成的字节码中。但是更多类型信息可用于�~�译器这一事实�Q��ؓ未来版本�?JVM 的优化带来可能。由于泛型的实现方式�Q�支持泛型（几乎�Q�不需�?JVM 或类文�g更改。所有工作都在编译器中完成，�~�译器生成类��g��没有泛型�Q�和强制�c�d��转换�Q�时所写的代码�Q�只是更能确保类型安全而已�?/p><p style="margin: 0px; padding: 0px; font-family: Arial; line-height: 26px; background-color: #ffffff;">&nbsp;</p><p style="margin: 0px; padding: 0px; font-family: Arial; line-height: 26px; background-color: #ffffff;">&nbsp;</p><p style="margin: 0px; padding: 0px; font-family: Arial; line-height: 26px; background-color: #ffffff;">&nbsp;Java语言引入泛型的好处是安全���单。泛型的好处是在�~�译的时候检查类型安全，�q�且所有的强制转换都是自动和隐式的�Q�提高代码的重用率�?/p><p style="margin: 0px; padding: 0px; font-family: Arial; line-height: 26px; background-color: #ffffff;">&nbsp;&nbsp;&nbsp;&nbsp;泛型在��用中�q�有一些规则和限制�Q?br />&nbsp;&nbsp;&nbsp;&nbsp;1、泛型的�c�d��参数只能是类�c�d���Q�包括自定义�c�）�Q�不能是���单类型�?br />&nbsp;&nbsp;&nbsp;&nbsp;2、同一�U�泛型可以对应多个版本（因�ؓ参数�c�d��是不���定的）�Q�不同版本的泛型�c�d��例是不兼容的�?br />&nbsp;&nbsp;&nbsp;&nbsp;3、泛型的�c�d��参数可以有多个�?br />&nbsp;&nbsp;&nbsp;&nbsp;4、泛型的参数�c�d��可以使用extends语句�Q�例�?lt;T extends superclass&gt;。习惯上成�ؓ&#8220;有界�c�d��&#8221;�?br />&nbsp;&nbsp;&nbsp;&nbsp;5、泛型的参数�c�d���q�可以是通配�W�类型。例如Class&lt;?&gt; classType = Class.forName(Java.lang.String);</p><img src ="http://www.aygfsteel.com/lijun/aggbug/416730.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/lijun/" target="_blank">键盘动物</a> 2014-08-08 14:57 <a href="http://www.aygfsteel.com/lijun/archive/2014/08/08/416730.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>java 重写和重载的规则</title><link>http://www.aygfsteel.com/lijun/archive/2014/08/08/416729.html</link><dc:creator>键盘动物</dc:creator><author>键盘动物</author><pubDate>Fri, 08 Aug 2014 06:44:00 GMT</pubDate><guid>http://www.aygfsteel.com/lijun/archive/2014/08/08/416729.html</guid><wfw:comment>http://www.aygfsteel.com/lijun/comments/416729.html</wfw:comment><comments>http://www.aygfsteel.com/lijun/archive/2014/08/08/416729.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/lijun/comments/commentRss/416729.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/lijun/services/trackbacks/416729.html</trackback:ping><description><![CDATA[<p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;"><strong style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: #ff0000;">重写�Ҏ��的规�?/span></strong>�Q?/span></p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;">1、参数列表必���d��全与被重写的�Ҏ��相同�Q�否则不能称其�ؓ重写而是重蝲�?/span></p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;">2、返回的�c�d��必须一直与被重写的�Ҏ��的返回类型相同，否则不能�U�其为重写而是重蝲�?/span></p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;">3、访问修饰符的限制一定要大于被重写方法的讉K��修饰�W�（public&gt;protected&gt;default&gt;private�Q?/span></p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;">4、重写方法一定不能抛出新的检查异常或者比被重写方法申明更加宽泛的���查型异常。例如：</span></p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;">父类的一个方法申明了一个检查异常IOException�Q�在重写�q�个�Ҏ��是就不能抛出Exception,只能抛出IOException的子�c�d��常，可以抛出非检查异常�?/span></p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;">&nbsp;</p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;"><strong style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: #ff0000;">而重载的规则�Q?/span></strong></span></p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;">1、必���d��有不同的参数列表�Q?/span></p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;">2、可以有不责骂的�q�回�c�d���Q�只要参数列表不同就可以了；</span></p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;">3、可以有不同的访问修饰符�Q?/span></p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;">4、可以抛��Z��同的异常�Q?/span></p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;">&nbsp;</p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;"><strong style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: #ff0000;">重写与重载的区别在于�Q?/span></strong></span></p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;">重写多态性�v作用�Q�对调用被重载过的方法可以大大减���代码的输入量，同一个方法名只要往里面传递不同的参数���可以拥有不同的功能或返回倹{�?/span></p><p style="margin-top: 10px; margin-bottom: 10px; padding: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 20.8799991607666px; background-color: #ffffff;"><span style="margin: 0px; padding: 0px; font-family: 宋体;">用好重写和重载可以设计一个结构清晰而简�z�的�c�，可以说重写和重蝲在编写代码过�E�中的作用非同一�?</span></p><img src ="http://www.aygfsteel.com/lijun/aggbug/416729.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/lijun/" target="_blank">键盘动物</a> 2014-08-08 14:44 <a href="http://www.aygfsteel.com/lijun/archive/2014/08/08/416729.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>java 泛型使用 擦除�?/title><link>http://www.aygfsteel.com/lijun/archive/2014/08/08/416728.html</link><dc:creator>键盘动物</dc:creator><author>键盘动物</author><pubDate>Fri, 08 Aug 2014 06:38:00 GMT</pubDate><guid>http://www.aygfsteel.com/lijun/archive/2014/08/08/416728.html</guid><wfw:comment>http://www.aygfsteel.com/lijun/comments/416728.html</wfw:comment><comments>http://www.aygfsteel.com/lijun/archive/2014/08/08/416728.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/lijun/comments/commentRss/416728.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/lijun/services/trackbacks/416728.html</trackback:ping><description><![CDATA[<span style="font-family: 'Microsoft YaHei', Arial, Verdana, sans-serif; line-height: 19.600000381469727px; text-align: justify; background-color: #eeeeee;">擦除法�ƈ不代表编译后的字节码中就不包含我们在源代码定义的泛型�c�d��了。而是在字节码中引入新属性Signature �?LocalVariableTypeTable 来存储泛型。这也是��Z��么可以通过�q�回值重载，及通过反射获取到泛型的�Ҏ��原因</span><img src ="http://www.aygfsteel.com/lijun/aggbug/416728.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/lijun/" target="_blank">键盘动物</a> 2014-08-08 14:38 <a href="http://www.aygfsteel.com/lijun/archive/2014/08/08/416728.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Collections.synchronizedMap(new HashMap())�q�个�Ҏ��是什么意�?/title><link>http://www.aygfsteel.com/lijun/archive/2014/08/07/416687.html</link><dc:creator>键盘动物</dc:creator><author>键盘动物</author><pubDate>Thu, 07 Aug 2014 08:40:00 GMT</pubDate><guid>http://www.aygfsteel.com/lijun/archive/2014/08/07/416687.html</guid><wfw:comment>http://www.aygfsteel.com/lijun/comments/416687.html</wfw:comment><comments>http://www.aygfsteel.com/lijun/archive/2014/08/07/416687.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/lijun/comments/commentRss/416687.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/lijun/services/trackbacks/416687.html</trackback:ping><description><![CDATA[<span style="color: #333333; font-family: Helvetica, Tahoma, Arial, sans-serif; line-height: 24px; background-color: #f5f5f5;">Collections.synchronizedMap是个比较老的API了，实际用�v来还要手工做一些事�?/span><br style="box-sizing: content-box; color: #333333; font-family: Helvetica, Tahoma, Arial, sans-serif; line-height: 24px; background-color: #f5f5f5;" /><br style="box-sizing: content-box; color: #333333; font-family: Helvetica, Tahoma, Arial, sans-serif; line-height: 24px; background-color: #f5f5f5;" /><span style="color: #333333; font-family: Helvetica, Tahoma, Arial, sans-serif; line-height: 24px; background-color: #f5f5f5;">�������g��用Java5的ConcurrentHashMap或Java6的ConcurrentSkipListMap</span><img src ="http://www.aygfsteel.com/lijun/aggbug/416687.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/lijun/" target="_blank">键盘动物</a> 2014-08-07 16:40 <a href="http://www.aygfsteel.com/lijun/archive/2014/08/07/416687.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Eclipse中关联jar出现��q��</title><link>http://www.aygfsteel.com/lijun/archive/2014/07/31/416408.html</link><dc:creator>键盘动物</dc:creator><author>键盘动物</author><pubDate>Thu, 31 Jul 2014 07:31:00 GMT</pubDate><guid>http://www.aygfsteel.com/lijun/archive/2014/07/31/416408.html</guid><wfw:comment>http://www.aygfsteel.com/lijun/comments/416408.html</wfw:comment><comments>http://www.aygfsteel.com/lijun/archive/2014/07/31/416408.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/lijun/comments/commentRss/416408.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/lijun/services/trackbacks/416408.html</trackback:ping><description><![CDATA[<span style="color: #323e32; font-family: simsun; background-color: #9caec1;">1、首先要清楚源码的编码方式是什么？</span><br style="color: #323e32; font-family: simsun; background-color: #9caec1;" /><br style="color: #323e32; font-family: simsun; background-color: #9caec1;" /><span style="color: #323e32; font-family: simsun; background-color: #9caec1;">如果源码的编码是utf-8 ���需要这样修�?/span><br style="color: #323e32; font-family: simsun; background-color: #9caec1;" /><br style="color: #323e32; font-family: simsun; background-color: #9caec1;" /><span style="color: #323e32; font-family: simsun; background-color: #9caec1;">Preferences General &gt; Workspace 修改Text file encoding</span><br style="color: #323e32; font-family: simsun; background-color: #9caec1;" /><br style="color: #323e32; font-family: simsun; background-color: #9caec1;" /><span style="color: #323e32; font-family: simsun; background-color: #9caec1;">为UTF-8后才行�?/span><br style="color: #323e32; font-family: simsun; background-color: #9caec1;" /><br style="color: #323e32; font-family: simsun; background-color: #9caec1;" /><span style="color: #323e32; font-family: simsun; background-color: #9caec1;">重新启动Eclipse���可以解决了()</span><img src ="http://www.aygfsteel.com/lijun/aggbug/416408.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/lijun/" target="_blank">键盘动物</a> 2014-07-31 15:31 <a href="http://www.aygfsteel.com/lijun/archive/2014/07/31/416408.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>                                                                                                        <footer>
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