Use of SwingWorker to do complex tasks in background

Question

I am having a GUI of login screen. Whenever i press the login button the user name and password is checked against entry in an online mysql database,i\'m extracting all this

Answer 1

First of all, declare a member variable in your class (it could be in your GUI class) of type SwingWorker like this:

private SwingWorker backgroundProcess;

Then initialize the variable in your initialization code (constructor, onShow method event handler, etc) like this:

    backgroundProcess = new SwingWorker() {

        @Override
        protected Boolean doInBackground() throws Exception {
            // paste the MySQL code stuff here
        }

        @Override
        protected void done() {
            // Process ended, mark some ended flag here
            // or show result dialog, messageBox, etc      
        }
    };

Then, in your actionPerfomed method, call the SwingWorker's execute method:

    backgroundProcess.execute();

If done correctly, the GUI shouldn't freezee after the button press event