How to show dialog when lwjgl game crashes (java)

I am using LWJGL to make my new game.

Quick Question:

When my game crashes with something like this:

Exception in thread "main" java.lang.NullPointerException at engineTester.MainGameLoop.main(MainGameLoop.java:376) C:\Users\users\AppData\Local\NetBeans\Cache\8.1\executor-snippets\run.xml:53: Java returned: 1

How do I get it to print it in dialog so that when someone runs it and it crashes they will be able to see it as a dialog that is has crashed

Hope it made sense

Solution

You can use try ...catch and catch the exception (in a baseclass / superclass), send the user an error code that he can report and log a more detailed error. Depending on your configuration:

 ...
    try {
        /* game is playing() */
    }
    catch (MyGameException gameException) {        
       logging.log(gameException.log());        
       sendErrorCodeToTheUser(gameException);        
    }

I had a similar discussion with a colleague that a user can report an error code 1-10 or 1-1000 while the programmers can have a detailed log where the nullpointer was.