运用Polygon类绘制六边形

import javax.swing.JPanel;
import java.awt.Graphics;
import java.awt.Polygon;
public class PolygonsPanel extends JPanel {

	protected void paintComponent(Graphics g)
	{
		super.paintComponent(g);
		int xCenter=getWidth()/2;
		int yCenter=getHeight()/2;
		int radius=(int)(Math.min(getWidth(), getHeight()*0.4));
		Polygon polygon=new Polygon();
		polygon.addPoint(xCenter+radius,yCenter);
		polygon.addPoint((int)(xCenter+radius*Math.cos(2*Math.PI/6)), (int)(yCenter-radius*Math.sin(2*Math.PI/6)));
		polygon.addPoint((int)(xCenter+radius*Math.cos(2*2*Math.PI/6)),(int)(yCenter-radius*Math.sin(2*2*Math.PI/6)));
		polygon.addPoint((int)(xCenter+radius*Math.cos(2*3*Math.PI/6)),(int)(yCenter-radius*Math.sin(2*3*Math.PI/6)));
		polygon.addPoint((int)(xCenter+radius*Math.cos(2*4*Math.PI/6)),(int)(yCenter-radius*Math.sin(2*4*Math.PI/6)));
		polygon.addPoint((int)(xCenter+radius*Math.cos(2*5*Math.PI/6)),(int)(yCenter-radius*Math.sin(2*5*Math.PI/6)));
		g.drawPolygon(polygon);
	}
}

import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Graphics;
import java.awt.Polygon;
public class DrawPolygon extends JFrame{

	public DrawPolygon()
	{
		setTitle("DrawPolygon");
		add(new PolygonsPanel());
	}
	public static void main(String[] args)
	{
		DrawPolygon frame =new DrawPolygon();
		frame.setSize(200,250);
		frame.setLocationRelativeTo(null);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);
	}
}