Summary Steps

-instance variables:

Image osImg; // off-screen image

Graphics osG; // off-screen graphics

boolean startOut = true; // first time painting or not?

Dimension curD; // current size of off-screen stuff

-override update():

public void update (Graphics g) {

paint(g); }

-override paint()

public void paint (Graphics g) {

// is this the first time we are painting?

if (startOut) {

curD = size();

osImg = createImage (curD.width, curD.height);

osG = osImg.getGraphics();

startOut = false;

}

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