从 Eclipse 运行 Visual VM
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Running Visual VM from eclipse
提问by Anushree Acharjee
I am trying to debug a java app using Visual VM in Eclipse kepler. I am executing the class having main method selecting Visual VM as launcher. I have configured Visual VM as per the instructions given in http://blog.idrsolutions.com/2013/05/setting-up-visualvm-in-under-5-minutes. I am getting the following error:
我正在尝试在 Eclipse 开普勒中使用 Visual VM 调试 Java 应用程序。我正在执行具有选择 Visual VM 作为启动器的 main 方法的类。我已经按照http://blog.idrsolutions.com/2013/05/setting-up-visualvm-in-under-5-minutes 中给出的说明配置了 Visual VM 。我收到以下错误：
An internal error occurred during: “Launching TestNew”.
java.lang.NullPointerException
“TestNew” is the name of the class with main method I am trying to execute.
“TestNew”是我试图执行的带有 main 方法的类的名称。
please help.
请帮忙。
回答by Markus A.
I had the same issue... Let me expand a bit on Anushree's comment:
我有同样的问题......让我扩展一下 Anushree 的评论：
- Go to Window⇒ Preferences⇒ Run/Debug⇒ Launching⇒ VisualVM Configuration
- Browse...for the VisualVM Executablein your JDK's bin-directory
- Make sure to also set the JDK's root directory under JDK Home. If you leave that pointing to your JRE directory, you'll run into the next error...
- 转到窗口⇒首⇒运行/调试⇒启动⇒ VisualVM的配置
- 在 JDK 的 bin 目录中浏览...以查找VisualVM Executable
- 确保还在JDK Home下设置 JDK 的根目录。如果你把那个指向你的 JRE 目录，你会遇到下一个错误......
Happy profiling...
快乐的剖析...
BTW: If you then have issues getting your application to show up inside jVisualVM, take a look here: Getting Java program running in Eclipse to show up in VisualVM
顺便说一句：如果您在将应用程序显示在 jVisualVM 中时遇到问题，请查看此处： 让 Java 程序在 Eclipse 中运行以显示在 VisualVM 中
