http://www.weiqigao.com/blog/tags/jdk/ Sharing My Experience... en Weiqi Gao Fri, 11 May 2012 12:48:36 GMT Pebble (http://pebble.sourceforge.net) http://backend.userland.com/rss http://pebble.sourceforge.net/common/images/powered-by-pebble.gif http://www.weiqigao.com/blog/ http://www.weiqigao.com/blog/2008/09/17/visualvm_is_in_the_jdk_now.html <p>... you should check it out:</p> <pre style="margin-left:3em">[weiqi@gao] $ <b>jvisualvm</b></pre> <center> <a href="http://www.weiqigao.com/blog/images/jvisualvm.png"> <img src="http://www.weiqigao.com/blog/images/jvisualvm.png" title="VisualVM In Action" alt="Visual VM In Action" width="399" height="366"/> </a> </center> http://www.weiqigao.com/blog/2008/09/17/visualvm_is_in_the_jdk_now.html#comments http://www.weiqigao.com/blog/2008/09/17/visualvm_is_in_the_jdk_now.html Wed, 17 Sep 2008 15:14:37 GMT http://www.weiqigao.com/blog/2006/02/18/new_toys_in_jdk_6.html <p>I just downloaded and installed the beta release of <a href= "http://java.sun.com/javase/6/download.jsp" >JDK 6</a> a.k.a. Mustang. And here's some very superficial impressions.</p> <ul> <li>The download is almost the same size as JDK 5.</li> <li>Both <a href= "" >Rhino</a> and <a href= "" >Jython</a> started up under JDK 6 Beta with no problems. This was <a href= "http://www.weiqigao.com/blog/2004/06/09/jdk_1_5_beta_2_jython_2_1_classformaterror.html" >not the case</a> for JDK 5. JEdit 4.2 works fine too.</li> <li><tt>javap</tt> output still looks funny.</li> <li>The JDK bin directory contains the following new experimental tools (some <a href= "http://java.sun.com/javase/6/docs/tooldocs/index.html" >documented here</a>): <ul> <li><b>java-rmi</b>: ?</li> <li><b>jhat</b>: Heap Dump Browser - Starts a web server on a heap dump file (e.g., produced by jmap -dump), allowing the heap to be browsed.</li> <li><b>jmap</b>: Memory Map for Java - Prints <span style="color:red" title= "Anybody know what these are?" >shared object memory</span> maps or heap memory details of a given process or core file or a remote debug server.</li> <li><b>jrunscript</b>: Script shell for Java - Runs a script. (See <a href= "http://www.ociweb.com/jnb/jnbFeb2006.html" >Paul Jensen's article</a>.)</li> <li><b>jstack</b>: Stack Trace for Java - Prints a stack trace of threads for a given process or core file or remote debug server.</li> <li><b>schemagen</b>: ?</li> <li><b>wsgen</b>: ?</li> <li><b>wsimport</b>: ?</li> <li><b>xjc</b>: ?</li> </ul> </li> </ul> <p>This doesn't feel like the big jump that we experienced with JDK 5. (But if you know what "shared object memory" is, I'd like to hear about it.)</p> <p>Interestingly, in the OCI Java lunch yesterday, most of the developers are still using JDK 1.4 at work. They didn't move to JDK 5 for various reasons. It would be interesting to see how organizations manage the transition to JDK 6. Maybe they can just skip 5 and go to 6 directly?</p> <p>I have a feeling that the lack of a 5.1 version has really hurt the adoption of JDK 5.</p> http://www.weiqigao.com/blog/2006/02/18/new_toys_in_jdk_6.html#comments http://www.weiqigao.com/blog/2006/02/18/new_toys_in_jdk_6.html Sat, 18 Feb 2006 13:16:25 GMT