如何在java中绘制或填充梯形？

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

public class TrapezoidExample extends JPanel {
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        
        // 设置绘制颜色
        g.setColor(Color.BLUE);
        
        // 定义梯形的顶点坐标
        int x1 = 50, y1 = 100;
        int x2 = 150, y2 = 100;
        int x3 = 200, y3 = 200;
        int x4 = 0, y4 = 200;
        
        // 绘制梯形的四条边
        g.drawLine(x1, y1, x2, y2);
        g.drawLine(x2, y2, x3, y3);
        g.drawLine(x3, y3, x4, y4);
        g.drawLine(x4, y4, x1, y1);
        
        // 填充梯形的内部
        g.fillPolygon(new int[]{x1, x2, x3, x4}, new int[]{y1, y2, y3, y4}, 4);
    }
    
    public static void main(String[] args) {
        JFrame frame = new JFrame("Trapezoid Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 300);
        frame.add(new TrapezoidExample());
        frame.setVisible(true);
    }
}