How to Stop Repaint in Java With JPanel

Normally, a program written with Java's built-in GUI packages automatically repaint themselves when conditions change.

Java's built-in Swing and AWT libraries enhance the process of creating and displaying elements of a graphical user interface. A JPanel is a Swing component that holds the contents of a GUI, such as buttons and text boxes. By default, Swing records the state of GUI objects and automatically repaints them on the screen whenever a user's actions change them. However, you can choose to disable automatic repainting and replace its function with your own code.

Instructions

1. Grab the reference to your JPanel, e.g. "JPanel myPanel."

2. Access the repaint manager for your JPanel, e.g:

   RepaintManager myPanelsManager = RepaintManager.currentManager(myPanel)

3. Tell the repaint manager not to repaint your JPanel when it changes, e.g.:

   myPanelsManager.markCompletelyClean(myPanel);

Tips & Warnings

• You can also use the line, "myPanel.setIgnoreRepaint(true)" to prevent the operating system from repainting your JPanel. System calls will not be affected.

References

• Java 6 API: Repaint Manager