Re: JFrame *sometimes* updating text on JLabel

Thanks for the comment. After further review of Swing, threads, and
the EDT, it was an issue with the EDT and how background tasks were
handled.

Initially, I created a Swing Timer to handle polling the server and put
the code to do that in an ActionListener. But after looking at this
article (http://www.javapractices.com/Topic160.cjp), I moved the server
polling code out of the ActionListener and instead created a daemon
thread to handle the polling.

*******Updated Code*********
        public void startPollingTimer() {
              timerBtwPolling = new Timer(pollingInterval, new
PollingListener());
        timerBtwPolling.start();
        }

    private class PollingListener implements ActionListener {
        public void actionPerformed(ActionEvent evt) {
            Thread worker = new Thread( new PollingWorker() );
            worker.setDaemon(true);
            worker.start();
        }
    }

    private class PollingWorker implements Runnable{
        public void run(){
            PollingController retriever = PollingController.getInstance();
            retriever.startServerPolling();
        }
    }

*******Original Code*********
        public void startPollingTimer() {
              timerBtwPolling = new Timer(pollingInterval, new
PollingListener());
        timerBtwPolling.start();
        }

    private class PollingListener implements ActionListener {
        public void actionPerformed(ActionEvent evt) {
        PollingController retriever = PollingController.getInstance();
            retriever.startServerPolling();
        }
    }

    private class PollingWorker implements Runnable{
        public void run(){
            PollingController retriever = PollingController.getInstance();
            retriever.startRrtsPolling();
        }
    }

The code's not compilable, but hopefully the idea comes across. This
fix seems to have cleared up the EDT race conditions that were causing
the Message Pop-Up to sometimes show the updated text.

Andrew Thompson wrote: