java JAI图像一屏显示

class DrawImageTest {

static BufferedImage iamge = getImage();
static int width, height;

public static void main(String[] args) {

JFrame frame = new JFrame();
final JPanel panel = new JPanel() {

@Override
public void paint(Graphics g) {
g.drawImage(iamge, 0, 0, width, height, 0, 0, iamge.getWidth(), iamge.getHeight(), this);
}
};
frame.add(panel);
frame.addComponentListener(new ComponentAdapter() {

@Override
public void componentResized(ComponentEvent e) {
width = panel.getWidth();
height = panel.getHeight();
panel.repaint();
}
});
frame.setSize(200, 300);
frame.setVisible(true);
}

public static BufferedImage getImage() {
BufferedImage image = // Create an off-screen image
new BufferedImage(65, 35, BufferedImage.TYPE_INT_RGB);
Graphics2D ig = image.createGraphics(); // Get its Graphics for draw