自定以圖片為背景的 JPanel

繼承 JPanel 並 override paintComponent(Graphics gc) 就可以了：

public class ImageBackgroundJPanel extends JPanel {

private Image backgroundImg = null;

public ImageBackgroundJPanel(String imagePath) {

backgroundImg = new ImageIcon(imagePath).getImage();

}

@Override

protected void paintComponent(Graphics gc) {

gc.drawImage(backgroundImg, 0, 0, this);

}

}