如何在Java中设置背景图像？

import javax.swing.*;
import java.awt.*;

public class Main {
    public static void main(String[] args) {
        JFrame frame = new JFrame("设置背景图像示例");
        frame.setSize(400, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new BorderLayout());

        JPanel panel = new JPanel();
        panel.setPreferredSize(new Dimension(300, 200));

        ImageIcon imageIcon = new ImageIcon("path/to/your/image.jpg");
        JLabel label = new JLabel(imageIcon);
        label.setSize(imageIcon.getIconWidth(), imageIcon.getIconHeight());
        label.setLocation(0, 0);
        label.setVisible(true);
        panel.add(label);

        frame.add(panel, BorderLayout.CENTER);
        frame.setVisible(true);
    }
}