public void actionPerformed(ActionEvent evt) {
// if start is pressed, activate run method
if (evt.getActionCommand().equals("Start")) {
start();
}
// if stop is pressed, stop all of the balls
// and change color.
if (evt.getActionCommand().equals("Stop")) {
stop();
changeColor();
}
// if clear all is pressed, clear all of the balls
// from the canvas.
if (evt.getActionCommand().equals("Clear All")) {
ball.removeFromCanvas();
}
}
