My Swing program creates many threads and it's getting hard to handle exceptions properly. I would like to rely on a global exception handler, and i came across
Thread.UncaughtExceptionHandler Everything seemed to work fine, until i introduced a SwingWorker to perform a background task. Apparently, if an exception occurs inside my swing worker and it is not handled inside it, the exception will not be picked up by Thread.UncaughtExceptionHandler
This is a small snippet to test this behaviour:
import javax.swing.SwingUtilities; import javax.swing.SwingWorker; public class SwingWorkerAndDefaultUncaughtExceptionHandler { MyTask task = new MyTask(); public SwingWorkerAndDefaultUncaughtExceptionHandler() { Thread.setDefaultUncaughtExceptionHandler(new CentralizedExceptionHandler()); task.execute(); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { new SwingWorkerAndDefaultUncaughtExceptionHandler(); } }); } private class MyTask extends SwingWorker<Void, Void> { @Override protected Void doInBackground() { System.out.println("doInBackGround invoked"); Integer i = null; System.out.println(i.doubleValue()); System.out.println("This line is not reached"); return null; } @Override protected void done() { System.out.println("done invoked"); } } public static class CentralizedExceptionHandler implements Thread.UncaughtExceptionHandler { @Override public void uncaughtException(Thread t, Throwable e) { System.out.println("This line is not reached either"); } } Am i missing something here? Is there something i can set on my swingworker to behave as expected?
