drawtest.java

介绍有关java的资料 课件 相当一本书籍 里面都是很基础的知识

/**
 * Title:        Java语言多媒体编程演示
 * Description:  Java语言多媒体编程演示，用于北京师范大学计算机系Java课程教学示范。
 * Copyright:    Copyright (c) 2001
 * Company:      北京师范大学计算机系
 * @author 孙一林
 * @version 1.0
 */

import java.awt.*;

public class DrawTest extends Frame {
    public DrawTest() {
	setLayout(new BorderLayout());
	DrawPanel display = new DrawPanel();
	add("Center", display);
    }

    public boolean handleEvent(Event e) {
	switch (e.id) {
	  case Event.WINDOW_DESTROY:
	    System.exit(0);
	    return true;
	  default:
	    return false;
	}
    }

    public static void main(String args[]) {
	DrawTest drawTest = new DrawTest();
        drawTest.setTitle("画图程序");
        drawTest.setSize(500,300);
        drawTest.show();
    }
}

class DrawPanel extends Panel {
    public void paint(Graphics g) {
int red,green,blue;
		for (int i=10;i<400;i+=40){
			red = (int)Math.floor(Math.random()*256);
			green = (int)Math.floor(Math.random()*256);
			blue = (int)Math.floor(Math.random()*256);
			g.setColor(new Color(red,green,blue));
			g.fillRect(i,20,30,30);
		}
    }
}