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import javax.swing.*;
import java.awt.*;
import java.awt.image.*;
public class MyFrame extends JFrame {
private static final Image image = Toolkit.getDefaultToolkit().getImage("C:\\车牌.jpg");
JPanel p, p1;
Graphics gp1;
public MyFrame() {
this.setSize(800, 600);
p = new MyPanel(image);
p1 = new MyPanel();
p1.setBounds(0, 0, 800, 600);
p.setBounds(0, 0, 800, 600);
p1.setOpaque(false);
p1.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
public void mouseMoved(java.awt.event.MouseEvent evt) {
p1MouseMoved(evt);
}
});
add(p);
add(p1);
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
}
private void p1MouseMoved(java.awt.event.MouseEvent evt) {
gp1 = p1.getGraphics();
p1.paintImmediately(0, 0, 800, 600);
gp1.setColor(new Color(1f, 0f, 0f, 1f));
gp1.drawRect(evt.getX(), evt.getY(), 100, 100);
}
public static void main(String[] args) {
MyFrame frame = new MyFrame();
}
}
class MyPanel extends JPanel {
private Image image = null;
public MyPanel(Image image) {
super();
this.image = image;
}
public MyPanel() {
super();
}
protected void paintComponent(Graphics g) {
g.drawImage(image, 0, 0, this.getWidth(), this.getHeight(), this);
}
}