runtext3d.java

Java Applet实例讲解 N多例子

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

public class RunText3D extends Applet implements Runnable
{
  private Image img;
  private Image offI;
  private Graphics offG;
  private Thread thread = null;
  private MediaTracker imageTracker;
  
  private int height,width;
  private String text;
  private int FontSize;
  private Font font;
  private boolean drawOK = false;
  
  public void init()
  {    
    width = this.size().width;
    height = this.size().height;
    this.setBackground(Color.black);
    
    img = createImage(width,height);
    Graphics temp = img.getGraphics();
    temp.setColor(Color.black);
    temp.fillRect(0,0,width,height);
    temp.setColor(Color.red);
    text = new String("Hello");
    String s = new String(getParameter("Text"));
    if(s != null)
      text = s;
    FontSize = 30;
    font = new Font("TimesRoman",Font.BOLD,FontSize);
    temp.setFont(font);
    temp.drawString(text,10,height*3/4);
    
    imageTracker = new MediaTracker(this);
    imageTracker.addImage(img,0);
    
    try
    {
      imageTracker.waitForID(0);
    }
    catch(InterruptedException e){}
    
    offI = createImage(width,height);
    offG = offI.getGraphics();
    
  }
  
  public void start()
  {
    if(thread == null)
    {
      thread = new Thread(this);
      thread.start();
    }
  }
  
  public void run()
  {
    int x=15;
    int y = height-15;
    
    int R,G,B;
    
    offG.setFont(font);
    while(thread != null)
    {
      
      while(!drawOK)
      {
        R = (int)(255*Math.random());
        G = (int)(255*Math.random());
        B = (int)(255*Math.random());
        try
        {
          thread.sleep(3000);
        }
        catch(InterruptedException ex){}
        offG.setColor(Color.yellow);
        offG.fillRect(0,0,width,height);
        repaint();
 
        for(int i=0; i<10; i++)
        {
          offG.setColor(new Color((R+(255-R)*i/10),(G+(255-G)*i/10),(B+(255-B)*i/10)));
          offG.drawString(text,x+i,y-i);
        
          repaint();
          try
          {
            thread.sleep(50);
          }
          catch(InterruptedException e){}
        }
        
        for(int i=0; i<10; i++)
        {
          offG.setColor(new Color((255-(255-R)*i/10),(255-(255-G)*i/10),(255-(255-B)*i/10)));
          offG.drawString(text,x+9,y-9);
        
          repaint();
          try
          {
            thread.sleep(50);
          }
          catch(InterruptedException e){}
        }
        
        drawOK = true;
        repaint();
      }

    }
  }
  
  public void update(Graphics g)
  {
    paint(g);
  }
  
  public void paint(Graphics g)
  {
    int pX;
    g.drawImage(offI,0,0,this);
    
    pX = 0;
    
    while(drawOK)
    {
      g.drawImage(offI,pX,0,this);
      try
      {
        Thread.sleep(50);
      }
      catch(InterruptedException e){}
      pX+=3;
      System.out.println(pX);
      if(pX>width)
      {
        pX = 0;
        drawOK = false;
      }
    }
    
    
  }


}