The programme continues to work after a rough exception

[rosemadder]

I have this class:

private class MyThread extends SwingWorker<Void, Void> {
    private MultidimensionalSolver solver;
@Override
protected Void doInBackground() throws Exception {
    manager.getInfoPanel().setVisible(true);
    solver = new MultidimensionalSolver(manager.getTask());
    while (!solver.isSolutionFind() &amp;&amp; flag) {
        solver.findSolution();
        manager.getTask().setSolution(
                solver.getSolution().getSolution());
    }
    return null;
}

public void done() {
    //setSolution();
    throw new NullPointerException();
}

private void setSolution() {
    manager.getInfoLabel().setText(solver.getSolution().toGuiString());
    if (!manager.getTable().isTableSoluted()) {
        manager.getTable().addLastColumn();
        manager.getRowTable().addSolutionRow();
    }
    manager.getRowTable().updateUi();
}

}

I had an exception in the setSolution. Which was more obvious, I'm generating an exception in the method. There's a very strange behavior going on. I'm not processing an exception anywhere. Swing worker I'm starting here:

private void callSolver() {

manager.getStop().addActionListener(new ActionListener() {

    @Override
    public void actionPerformed(ActionEvent e) {
        flag = false;
    }
});
thread = new MyThread();
thread.execute();

}

This method is called:

@Override

protected void createOkAction() {

if (withEdit.isSelected()) {

manager.getTask().setSolutionEditable(true);

} else {

manager.getTask().setSolutionEditable(false);

}

callSolver();

}

And he's here in turn:

protected JButton createOkButton(){

JButton ok = new JButton("ok");

ok.addActionListener(new ActionListener() {

    @Override
    public void actionPerformed(ActionEvent e) {
        createOkAction();
        frame.dispose();
    }
});
return ok;

}

I mean, it's a button processor.
As you can see, I don't do anything about the exception. But after that exception, there's stacktrace going on and the program doesn't fall! I can keep working with the GUI, like I've never been. Why would such behaviour happen? I suspect it might have something to do with adding SwingWorker's program to a multi-point program.

[Trenton]

public class NullPointerException extends RuntimeException

This exception is uncheckedif it occurs in another flow and if it is not processed, it will be used http://docs.oracle.com/javase/7/docs/api/java/lang/Thread.UncaughtExceptionHandler.html It's a default that'll just lead stack trace. Flow performance will be interrupted.