rollingmessage.java.bak

一个十分好的java基础学习的课件

import java.applet.Applet;
import java.awt.Image;
import java.awt.Graphics;
import java.awt.Font;
import java.awt.Color;
import java.awt.*;

public class RollingMessage extends Applet implements Runnable
{   Thread runThread;
    String s="Welcome to CUMT University!";
    int s_length=s.length( );
    int x_character=0;
    Font wordFont=new Font("Arial",Font.BOLD,36);
    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("DongHua Program");
        RollingMessage drawText=new RollingMessage( );
        drawText.init( );
        drawText.start( );
        f.add("Center",drawText);
        f.resize(600,100);
        f.show( );
    }
}