Java面板水平翻转

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class HorizontalFlipPanel extends JPanel {
    private static final int PANEL_WIDTH = 400;
    private static final int PANEL_HEIGHT = 300;

    public HorizontalFlipPanel() {
        setPreferredSize(new Dimension(PANEL_WIDTH, PANEL_HEIGHT));
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        
        Graphics2D g2d = (Graphics2D) g.create();
        
        // 水平翻转坐标系
        g2d.scale(-1, 1);
        g2d.translate(-getWidth(), 0);
        
        // 绘制面板内容
        // ...
        
        g2d.dispose();
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Horizontal Flip Panel");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().add(new HorizontalFlipPanel());
        frame.pack();
        frame.setVisible(true);
    }
}