Making Swing components appear without need of resizing my application

I have problem with loading a component in my JFrame. The component doesn't appear until i reasize my window. I searched about that problem and find a solution with:

Thread repainter = new Thread(new Runnable() {
            @Override
            public void run() {
                while (true) { // I recommend setting a condition for your panel being open/visible
                    frame.repaint();
                    try {
                        Thread.sleep(30);
                    } catch (InterruptedException ignored) {
                    }
                }
            }
        });

        repainter.setName("Panel repaint");
        repainter.setPriority(Thread.MIN_PRIORITY);
        repainter.start();

The problem is that this work with loading another components after the first one, but when i load my aplication for the first time I still need to resize it.

I'll be glad to hear any better solution for solving this problem.

Thanks in advance.

it seems that you will need to call the frame's validate() method too.

e.g.

 frame.repaint();
 frame.validate();

source: more information here