public void actionPerformed(ActionEvent event) {
PanImage1 panImage1 = new PanImage1();
PanImage2 panImage2 = new PanImage2();
PanImage3 panImage3 = new PanImage3();
revalidate();
if (event.getSource() == btnClick) {
if (nImg == 0) {
nImg = 3;
} else {
nImg--;
}
} else if (event.getSource() == btnClick2) {
if (nImg == 4) {
nImg = 1;
} else {
nImg++;
}
} else if (event.getSource() == btnClick3) {
System.exit(0);
}
if (nImg == 1) {
add(panImage1);
}
if (nImg == 2) {
add(panImage2);
}
if (nImg == 3) {
add(panImage3);
}
}
protected void windowClosingEvent(final WindowEvent e) {
System.exit(0);
}