extendwords.java

飞行文字 需要的请下载,请多多指教

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

public class ExtendWords extends Applet implements Runnable
{
	private Image myImage;
	private Graphics myGraphic;
	private int width = 0, height = 0;
	private String myText, words;
	private Thread mythread;
	private int xPosition = 0, yPosition = 0, myHeight;
	private int times = 0;
	private Font font;
	
	public void init()
	{
		font = new Font("TimesRoman", Font.BOLD,30);
		width = this.size().width;
		height = this.size().height;
		myHeight = height / 3;
		yPosition = myHeight;
		myText = getParameter("words");
		if(myText!=null)
			words = myText;
		myImage = createImage(width,height);
		myGraphic = myImage.getGraphics();
	}  
  
	public void start()
	{
		if(mythread == null)
		{
			mythread = new Thread(this);
			mythread.start();
		}
	}     
   
	public void update(Graphics g)
	{
		paint(g);
	}
   
	public void paint(Graphics g)
	{
		g.drawImage(myImage, 0, yPosition, width, myHeight ,this); 
	}
   
	public void run()
	{
		try
		{
			while(true)
			{
				yPosition = 0;
				myHeight = height;
				myGraphic.setColor(Color.white);
				myGraphic.fillRect(0 ,0, width, height);
				repaint();
				mythread.sleep(100);
				if(times == 0)
				{
					myGraphic.setColor(Color.blue);
					for(int i = width; i>=0; i--)
					{
						myGraphic.fillRect(i, height / 3 ,width, height /10); 
						repaint();
						mythread.sleep(10);
					}
				}
				else if(times == 1)
				{
					myGraphic.setColor(Color.yellow);
					for(int i = 0; i<=width; i++)
					{
						myGraphic.fillRect(0, height / 3 ,i, height /10);
						repaint();
						mythread.sleep(10);
					}
				}
				yPosition = height / 3;
				myHeight = height / 3;
				for(int i = height / 3; i>=0; i--)
				{
					xPosition = 0;
					yPosition--;
					myHeight = myHeight + 2;
					if(times == 0)
					{
						myGraphic.setColor(Color.blue);
						myGraphic.fillRect(0,0, width,height);
						myGraphic.setFont(font);
						myGraphic.setColor(Color.white); 
						myGraphic.drawString(words,10,35);  
						times++;
					}
					else if(times == 1)
					{
						myGraphic.setColor(Color.yellow);
						myGraphic.fillRect(0,0, width,height);
						myGraphic.setFont(font);
						myGraphic.setColor(Color.black); 
						myGraphic.drawString(words,10,35);           
						times=0;
					}				
					repaint();
					mythread.sleep(100);
				}
				mythread.sleep(2500);           
			}
		}
		catch(InterruptedException e)
		{
		
		}
	}	
}