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public class OpacityWindow {
public static void main(String[] args){
JFrame frame = new JFrame();
MyPanel pnl = new MyPanel();
frame.setUndecorated(true);
frame.setContentPane(pnl);
frame.setBounds(500, 300, 500, 350);
AWTUtilities.setWindowOpaque(frame, false);
frame.setVisible(true);
}
}
class MyPanel extends JPanel{
@Override
public void paint(Graphics g) {
try {
Image image = ImageIO.read(Class.class.getResource("/123.png"));
Graphics2D g2 = (Graphics2D)g;
g2.drawImage(image,0,0,null);
} catch (IOException e) {
e.printStackTrace();
}
}
}