mycolordemo1.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 MyColorDemo1 extends Frame{
	public static void main(String[] args){
		MyColorDemo1 md = new MyColorDemo1();
		md.go();
	}
	private void go(){
		MyCanvas mc = new MyCanvas();
		setLayout(new BorderLayout(0, 0));
		add(mc, BorderLayout.CENTER);
		addWindowListener(new MyWindowAdapter());
		setSize(400, 260);
		setVisible(true);
	}
	class MyCanvas extends Canvas{
		public void paint(Graphics g){
			int r, green, b;
			
			for(int i=0; i<18; i++){
				r = i * 15;
				for(int j=0; j<52; j++){
					green = j * 5;
					for(int k=0; k<10; k++){
						b = k * 28;
						g.setColor(new Color(r, green, b));
						g.fillRect(20+i*20+k*2, 20+j*3, 2, 3);
					}
				}
			}
		}
	}

	class MyWindowAdapter extends WindowAdapter{
		public void windowClosing(WindowEvent e){
			System.exit(0);
		}
	}
}