Frame wiping itself clean after each repaint

Question

I didn't call super.paintMethod() in my paintMethod, yet, every time the code runs, it wipe the window clean for some reason. Any suggestions? Here's my code.

 for (int i = 0; i < 1000; i++) {

        frame.repaint();

        Thread.sleep(250);
        P.x += 50;
        if (P.x == 450) {
            P.x = 0;
            P.y += 50;
        } 

Answer 1

    frame.repaint();

Does it. By default Component#paintComponent() will render the background color on every repaint call. Though if you override this method, and you don't call super.paintComponent(), this step is omitted, causing an overlap painting.