Javax.swing.SwingUtilities.invokeAndWait limitation

Question

Hi all,
I have the following method:
private static void m() throws Throwable
try {
      javax.swing.SwingUtilities.invokeAndWait ( new Runnable(){public void run(){
      try{
            invoke ( ... );                        // a Method.invoke() call
      } catch(Throwable t) {throw t;}
  } catch (Throwable th){}
}If invoke() throws an exception, I need to pass the exception back to the caller of m(); however, I cannot do that since run() doesn't allow that
Thank you

Answer 1

Check the Javadoc, SwingUtilities.invokeAndWait(...) declares it can throw an InvocationtargetException that is just what you need.I knowYou didn't seem to, since you blamed an "invokeAndWait limitation" for a fact that is indeed with the Runnable interface.
but the problem is with the invoke() call (inside the run()). I have to wrap it in a try - catch. What should I do with the caught exception ?Rethrow it wrapped in an unchecked exception?
Note that if the exception thrown by Method.invoke() is already an InvocationTargetException, you may prefer to wrap this exception's cause instead, as the caller of invokeAndWait() will already have to unwrap it from an (+other+) InvocationTargetException.
All that (cheating with checked/unchecked exceptions) is frowned upon in business code but is acceptable in framework code. If the caller of m() needs a strongly-typed exception handling interface, I suggest you wrap the nasty code so as to expose only the clean-cut interface.
Note that Another practice that is questionable is a statement such as catch Throwable (except, again, in framework code). Regular business code shouldn't catch Errors.
I suggest you read the Java tutorial's [chapter on exceptions|http://download.oracle.com/docs/cd/E17409_01/javase/tutorial/essential/exceptions/index.html] as well.
Best regards.