JProgressBar doesn't update , can't find a clue

Question

nice job , now i just wanna know why if i add into while loop the instruction System.out.println below the progress is shown on both , cmd and Pgbar in the Gui ?? :

Answer 1

If you can't use SwingWorker then use SwingUtilities.invokeLater, e.g.:

if (progress != Path.operationProgress) {
    final int progressCopy = progress; // Probably not final so copy is needed
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        void run() {
            operationsProgressBar.setValue(progressCopy);
        }
    });
}

Note: When doing this, everything used in run has to be final or there have to be other measures to access the variables. This code is symbolic in that regard.

You need to do operations on Swing components outside the event dispatching thread, there is no way around this.