ch8_e8_11.java

《java语言与面向对象程序设计题解及实验指导》源代码

import java.awt.*; 
import java.applet.*;

public class ch8_e8_11 extends Applet implements Runnable
{
    final String rollingMessage = "SAILING, SAILING, I AM SAILING...";
    Thread m_Draw = null;
    int beginX;
    
    public void init()
    {
        m_Draw = new Thread(this);
    }
    public void paint(Graphics g)
    {
        g.drawString(rollingMessage, beginX, 40);
    }
    public void start()
    {
        m_Draw.start();
        try{
            Thread.sleep(50);
        }catch(InterruptedException e){}
    }
    public void stop()
    {
        //if(m_Draw.isAlive())
            //m_Draw.stop();
    }
    public void run()
    {
        try
        {
            while(true)
            {
                beginX = ++beginX % getWidth();
                repaint();
                Thread.sleep(100);
            }
        }
        catch(InterruptedException e)
        {
        }
    }
}