mydrawpolygon1.java

这个是JAVA程序基础书上第7章书实现的代码

import java.awt.*;
import java.awt.event.*;
public class MyDrawPolygon1{
	Frame f = new Frame("多边形的绘制");
	MyCanvas c = new MyCanvas();
	public static void main(String[] args){
		MyDrawPolygon1 mdp = new MyDrawPolygon1();
		mdp.go();
	}
	MyDrawPolygon1(){
		f.setLayout(new BorderLayout(0,0));
		f.setSize(300, 200);
		f.addWindowListener(new MyWindowAdapter());
	}
	void go(){
		f.add(c, BorderLayout.CENTER);
		f.setVisible(true);
	}
	class MyCanvas extends Canvas{
		public void paint(Graphics g){
			int[] d1x= {40, 69, 125, 80, 40};
			int[] d1y = {40, 40, 95, 115, 135};
			g.setColor(Color.red);
			g.drawPolygon(d1x, d1y, d1x.length);
			int[] d2x = {180, 200, 220, 200, 180};
			int[] d2y = {40, 40, 85, 85, 110};
			g.setColor(Color.blue);
			g.fillPolygon(d2x, d2y, d2x.length);
		}
	}
	class MyWindowAdapter extends WindowAdapter{
		public void windowClosing(WindowEvent e){
			System.exit(0);
		}
	}
}