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;
        }

This is the expected behaviour of painting, painting is destructive. On each paint cycle, the components are expected to completely repaint themselves. See [Painting and AWT and Swing](http://stackoverflow.com/questions/513832/how-do-i-compare-strings-in-java) and [Performing custom painting](http://docs.oracle.com/javase/tutorial/uiswing/painting/) — MadProgrammer, Mar 16 '15 at 20:05

score 0 · Accepted Answer · answered Mar 16 '15 at 17:24

0

    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.

answered Mar 16 '15 at 17:24

Mordechai

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How do I override this method? – Ski Mar 16 '15 at 17:25
1

By extending a component, BTW this is Java 101 and more important than graphics. Study that instead. – Mordechai Mar 16 '15 at 17:31
What do you mean extend a component? how do i extend a componet? – Ski Mar 16 '15 at 17:37
1

As I said you are fairly raw in the principle concepts in Java, go back to your books. – Mordechai Mar 16 '15 at 17:38

Frame wiping itself clean after each repaint

1 Answers1