向面板添加背景图像

Question

frame = new JFrame("Some frame");
panel1 = new JPanel();
panel1.setBorder(new EmptyBorder(5, 5, 5, 5));
// NEED TO ADD AN IMAGE TO THIS PANEL

panel1.setLayout(cardlayout);
frame.getContentPane().add(panel1);

frame.setLocationByPlatform(true);
frame.setVisible(true);

    panel1 = new JPanel()
    {
    private static final long serialVersionUID = 1L;

    @Override
    public void paintComponent(Graphics g)
    {

        g.drawImage(Toolkit.getDefaultToolkit().createImage("1.jpg"), 0, 0, null);
    }
};

Answer 1

您需要重写JPanel的PaintComponent（Graphics g)方法，并在Graphics对象g上使用DrawImage()。

还有，查看@trashgod的这两个例子：

1. 示例。
2. 示例。