How do I catch this exception in Swing?

Question

I have a Swing application, and even though I have everything in a try/block, the exception isn\'t caught.

public static void main(         


        

Answer 1

As mentioned by another poster, your problem is that the exception is being thrown in another thread, the event dispatch thread. A couple of solutions:

• put a try/catch around the actual code where the exception is occurring: e.g. if it's in response to a button click handled by an ActionListener, put the try/catch inside your actionPerformed() method;
• or, leave the exception as an uncaught exception, and add an uncaught exception handler. For example:

    Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
      public void uncaughtException(Thread t, Throwable e) {
        // ... do something with exception here ...
      }
    });

On a side-note, you should in principle but your UI startup code in a SwingUtilities.invokeLater().