如何在Java Swing中创建JTabbedPane的圆角

import javax.swing.*;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;

public class RoundedJTabbedPane extends JTabbedPane {

    @Override
    protected void paintComponent(Graphics g) {
        Graphics2D g2 = (Graphics2D) g.create();
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        int width = getWidth();
        int height = getHeight();

        // 绘制圆角矩形背景
        g2.setColor(getBackground());
        g2.fill(new RoundRectangle2D.Double(0, 0, width - 1, height - 1, 20, 20));

        super.paintComponent(g2);
        g2.dispose();
    }

    // 其他自定义方法和属性...

}

RoundedJTabbedPane tabbedPane = new RoundedJTabbedPane();
// 添加选项卡和内容...