Question

I am trying to display a Loading Image in a new JFrame when the User clicks a particular button in my application.The JFrame is displayed,but it shows nothing!,also with a WHITE background,whereas all the JFrames have a grey default background.What is Wrong here?

stop.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            analyzer.running=false;
            JFrame Load1=new JFrame("Load1");
            ImageIcon icon1=new ImageIcon("./ajax-loader.gif");
            System.out.println(icon1.getIconHeight());
            Load1.add(new JLabel("Retrieving...", icon1, JLabel.CENTER),BorderLayout.CENTER);
            Load1.pack();
            Load1.setSize(400,400);
            Load1.setVisible(true);

            System.out.println("Start Processing");
            parser.parse();  // Time Consuming method


            nw_Creator.create();
            System.out.println("End Processing");
            Load1.setVisible(false);

            home.setVisible(false);
            screen2.setVisible(true);

        }
    });

Answer 1

Do not put time consuming parts in an event handler or any method running in the event dispatch thread. You may want to use a swing worker instead.