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RText is a powerful, cross-platform programmer's text editor written in Java. It is designed to be easy to use, highly customizable and flexible. Part of RText's design is for the source code to be simple, easy to understand, and well documented, so that other programmers can look into its inner-workings and figure out how RText ticks with ease. A good place to start (besides the source code) is the Javadoc for all classes used in the project.

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/*
 * 09/17/2010
 *
 * AWTExceptionHandler.java - Catches uncaught throwables in the EDT.
 * Copyright (C) 2010 Robert Futrell
 * robert_futrell at users.sourceforge.net
 * http://rtext.fifesoft.com
 *
 * This file is a part of RText.
 *
 * RText is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * RText is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.fife.rtext;

import java.io.IOException;
import java.util.logging.FileHandler;
import java.util.logging.Level;
import java.util.logging.Logger;


/**
 * Catches uncaught exceptions thrown in the EDT.  This is "magic" that works
 * in at least 1.4 - 1.6 in Sun JVMs.  We cannot simply use
 * Thread.UncaughtExceptionHandler, since it didn't exist in
 * 1.4 (and it doesn't work for exceptions thrown while modal dialogs are
 * visible on the EDT anyway).
 * 
 * To use this class, call
 * AWTExceptionHandler.register().
 *
 * @author Robert Futrell
 * @version 1.0
 */
// NOTE: This class must be public and have a public, no-args default
// constructor for the EDT to use it.
public class AWTExceptionHandler {

	private Logger logger;
	private FileHandler fileHandler;


	public AWTExceptionHandler() {
		logger = Logger.getLogger("org.fife.rtext");
		try {
			fileHandler = new FileHandler(
					"%h/uncaughtRTextAwtExceptions.log", true);
			logger.addHandler(fileHandler);
		} catch (IOException ioe) {
			ioe.printStackTrace();
		}
	}


	/**
	 * Callback for whenever an uncaught Throwable is thrown on the EDT.
	 *
	 * @param t the uncaught Throwable.
	 */
	public void handle(Throwable t) {
		try {
			t.printStackTrace();
			logger.log(Level.SEVERE, "Uncaught exception in EDT", t);
		} catch (Throwable t2) {
			// don't let the exception get thrown out, will cause infinite
			// looping!
		}
	}


	/**
	 * Call this method to register this exception handler with the EDT.
	 */
	public static void register() {
		System.setProperty("sun.awt.exception.handler",
								AWTExceptionHandler.class.getName());
	}


}