bolang.txt

用Java语言编写的波浪文字显示出文本内容

import java.awt.*;
import java.applet.*;
 
public class boLang extends Applet implements Runnable
{
       String s=null;
       int direct=1;
       int Hrad=12;
       int Vrad=12;
       Thread thread=null;
       char words[];
       int phase=0;
       Image offI;
       Graphics offG;
       Color colors[];
       private Font f;
       private FontMetrics fm;
       public void init()
       { 
              String param=null;
              s=getParameter("word");
              setBackground(Color.black);
              words=new char[s.length()];
              s.getChars(0,s.length().words,0);
              offI=createImage(getSize().width,getSize().height);
              offG=offI.getGraphics();
              f=new Font("TimesRoman",Font.BOLD,36);
              fm=getFontMetrics(f);
              offG.setFont(f);
              float h;
              colors=new Color[s.length()];
              for (int i=0;i<s.length();i++){
                   h=((float)i/(float)s.length());
                   colors[i]=new Color(Color.HSBtoRGB(h,1.0f,1.0f);
                   }
        }
        public void start()
        {
               if (thread==null){
                  thread=new Thread(this);
                  thread.start();
                  }
        }
        public void stop()
        {
               if (thread!=null){
                  thread.stop();
                  thread=null; 
                  }
        }
        public void run()
        {
               while (thread!=null){
                     try {
                               Thread.sleep(200);
                          }catch(InterruptedException e){}
               repaint();
               }
        }
        public void update(Graphics g)
        {
               int x,y;
               double ang;
               offG.setColor(Color.black);
               offG.fillRect(0,0,getSize().width,getSize().height);
               phase+=direct;
               phase%=8;
               for (int i=0;i<s.length();i++){
                   ang=((phase-i*direct)%8)/4.0*Math.PI;
                   x=20+fm.getMaxAdvance()*i+(int)(Math.cos(ang)*Hrad);
                   y=60+(int)(Math.sin(ang)*Vrad);
                   offG.setColor(colors[(phase+i)%s.length()];
                   offG.drawChars(words,i,1,x,y);
                   }
               paint(g);
         }
         public void paint(Graphics g)
         {
                g.drawImage(offI,0,0,this);
        }
}