anchor.diff:  You can install another JDK for use with the jMonkey SDK. You then have to specify the location manually.
   
   .  Go to your jMonkeyEngine SDK installation directory. +
  -Mac users right-click jMonkeyApplication.app (which actually is a directory) in the Finder and select “Show package contents. 
  +Mac users right-click jMonkeyApplication.app (which actually is a directory) in the Finder and select "`Show package contents`". 
   .  Navigate to the `etc` directory. +
   Mac users navigate to `Contents/Resources/jmonkeyplatform/etc/`.
   .  Open the file `jmonkeyplatform.conf` in a text editor.
  
positive.code: 
  === Stability / Graphics issues
  
  On some Linux and Windows systems, the SDK might perform unstable and quit with native VM crashes or “x errors. There are a few things one can try to remedy those issues.
  
  
  ==== Heavyweight Canvas
  
  First of all theres the new “OpenGL” settings page in the SDK global settings where you can enable the “heavyweight canvas, which solved some issues for some people. The settings panel can be found under Tools→Options on Windows and Linux and in the main menu (or by pressing Apple-Comma) for MacOSX.
  
  If you cannot start the SDK, edit the file `config/Preferences/com/jme3/gde/core.properties` in the SDK settings folder (see above). If it doesn't exist, create the file including all folders. Add the line `use_lwjgl_canvas=true`. To try OpenGL1 compatibility mode (works for both canvas settings) add `use_opengl_1=true`.
  
  
  ==== Look and Feel
  
  The +++<abbr title="Operating System">OS</abbr>+++-built-in look and feel might cause issues, you can change the LAF by using the appropriate command line switch (or add it to the [app folder]/etc/jmonkeyplatform.conf file, without the “- - prefix).
  
  [source]
  ----
  
negative.code: 
  If you're behind a proxy or special network settings, try :
  
  . Disable your network connection.
  . Launch jme sdk (may wait 30s/1min for timeout).
  . Go into `menu:Tools[Options > General]`.
  . Setup "`manual proxy settings`" (for some reason the "`Use System Proxy Settings`" option doesn't work on some Linux distributions)
  
  link:https://hub.jmonkeyengine.org/t/jme-sdk-stalls-on-startup/30555[Discussion] of the problem.
  
  