问题
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:
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.
please help.
回答1:
I had the same issue... Let me expand a bit on Anushree's comment:
- Go to Window ⇒ Preferences ⇒ Run/Debug ⇒ Launching ⇒ VisualVM Configuration
- Browse... for the VisualVM Executable in 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...
Happy profiling...
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
来源：https://stackoverflow.com/questions/25805204/running-visual-vm-from-eclipse