heart.java

利用java语言实现了心脏、沙丘、飘带、金刚石等趣味图形

/*
 *  如果把肾形图案中小圆半径改形以等分点到定点的距离为半径, 则绘出心脏形图案
 *
 *  2006-4-12 梅树立
 */

import java.awt.*;
import java.applet.*;
import java.awt.geom.*;


public class Heart extends Applet {
	Ellipse2D.Double circle;
	
	public void init() {
	}

	public void paint(Graphics g) {
		Graphics2D g2D = (Graphics2D)g;
		setBackground(Color.blue);
		g2D.setPaint(Color.yellow);
		
		double x,y,y1,r = 100,r1;
		double a;		
		y1 = 240 - r;
		for(a = 0; a < 2 * Math.PI; a += Math.PI / 18) {
			x = r * Math.cos(a) + 320;
			y = r * Math.sin(a) + 240;
			r1 = Math.sqrt((x - 320) *(x - 320) + (y - y1) * (y - y1));
			circle = new Ellipse2D.Double(x - r1,y - r1, 2 * r1, 2 * r1);
			g2D.draw(circle);
		}
	}
}