http://clipmarks.com/clipper/loveclan/http://rss.clipmarks.com/clipper/loveclan/15Clip, tag and save information that's important to you. Bookmarks save entire pages...Clipmarks save the specific content that matters to you!en-ushttp://clipmarks.com/clipmark/F44838D7-FB86-44AA-B5C5-97FDC3F62D3C/<b>clipped by:</b> <a href="http://clipmarks.com/clipper/loveclan/">loveclan</a><br><div border="2" style="margin-top: 10px; border:#000000 1px solid;" width="90%"><div style="background-color:"><div align="center" width="100%" style="padding:4px;margin-bottom:4px;background-color:#666666;overflow:hidden;"><span style="color:#FFFFFF;font-weight:bold;">Clip Source: <a style="color:#FFFFFF;" href="http://www.ibm.com/developerworks/cn/java/j-scala01228.html" title="http://www.ibm.com/developerworks/cn/java/j-scala01228.html">www.ibm.com</a></span></div><div style="padding: 10px;"><div style="text-align:left;">使用关键字 <CODE>object</CODE> 来定义的，而不是使用 <CODE>class</CODE>。这是 Scala 对单例模式（Singleton pattern）的认可 — <CODE>object</CODE> 关键字告诉 Scala 编译器这将是个单例对象，因此 Scala 将确保只有一个 <CODE>HelloWorld</CODE> 实例存在</div></div></div></div><br><div style="margin-bottom: 40px;">Tags: <a href="http://clipmarks.com/tags/scala/" rel="tag">scala</a></div>http://www.ibm.com/developerworks/cn/java/j-scala01228.htmlTue, 21 Jul 2009 16:23:37 GMT