rollingmessage.java

jsp课件

import java.awt.*;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;

public class RollingMessage extends java.applet.Applet implements Runnable{
	Thread runThread;
	String s="欢迎进入“Web程序设计”课程的学习！";
	int s_length=s.length();
	int x_character=0;
	Font wordFont=new Font("楷体_GB2312",Font.BOLD,30);
	public void start(){
		if(runThread==null){
			runThread= new Thread(this);
			runThread.start();
		}
	}
	public void stop(){
		if(runThread!=null){
			runThread.stop();
			runThread=null;
		}
	}
	public void run(){
		while(true){
			if(x_character++>s_length)
			x_character=0;
			repaint();
			try{
				Thread.sleep(300);
			}
			catch(InterruptedException e){}
		}
	}
	public void paint(Graphics g){
		g.setFont(wordFont);
		g.setColor(Color.blue);
		g.drawString(s.substring(0,x_character),8,50);
	}
	public static void main(String args[]){
		Frame f=new Frame("动画程序");
		RollingMessage drawTest= new RollingMessage();
		drawTest.init();
		drawTest.start();
		f.add("Center",drawTest);
		f.resize(400,100);
		f.show();
	}
}