movestring.java

这是一个用java语言编写的关于世界杯的软件(我是一个足球迷啦)

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

public class MoveString extends Applet implements Runnable,ActionListener,TextListener{

     Color darkblue = new Color(255,0,128);
     Graphics offscreenG;
     Image offscreenImage;
     Image pictop;
     Image picbuttom;
     int d = 2;
     int r = 140;
     int angle = 0;
     int x = 270;
     int y = 400;
     int x0 = 260;
     int y0 = 200;
     int font = 65;
     Thread runner;
     TextField textString;
     String request;
     String name="Wan YanKai";


     public void init(){
          offscreenImage = createImage(getSize().width, getSize().height);
          offscreenG = offscreenImage.getGraphics();
          pictop = getImage(getCodeBase(),"top.gif");
          setLayout(null);
          picbuttom = getImage(getCodeBase(),"buttom.gif");
          setLayout(null);
          textString = new TextField(name,21);
          textString.addTextListener(this);
          add (textString);
         textString.setBounds(210,350,100,20);
          Button submitButton = new Button("Submit");
          submitButton.addActionListener(this);
          add (submitButton);
          submitButton.setBounds(330,350,50,20);
          Button clearButton = new Button("Restore");
          clearButton.addActionListener(this);
          add (clearButton);
          clearButton.setBounds(400,350,50,20);

     }

     public void change(){
          name = textString.getText();
          repaint();
     }

     public void textValueChanged(TextEvent t){
            change();
     } 

     public void actionPerformed(ActionEvent e) {
          request = e.getActionCommand();
          if (request == "Submit")
               change();
          else if (request == "Restore")
               {name = "Wan YanKai";
                textString.setText("Wan YanKai");
                repaint();
               }
     }

     public void start(){
          if (runner == null) {
               runner = new Thread(this);
               runner.start();
          }
     }

     public void stop(){
          if (runner != null) {
               runner.stop();
               runner = null;
          }
     }

     public void run(){
          while (true){
              angle += 1;
              x = (int)(r*Math.sin(2*Math.PI*angle/360))+x0;
              y = (int)(r*Math.cos(2*Math.PI*angle/360))+y0;
              {
              if (((angle >=0)&&(angle<90))&&(angle%3==0))
                 font -=1;
              else if (((angle >=90)&&(angle<180))&&(angle%3==0))
                 font -=1;
              else if (((angle >=180)&&(angle<270))&&(angle%3==0))
                 font +=1;
              else if (((angle >=270)&&(angle<360))&&(angle%3==0))
                 font +=1;
              }
              d = 2;
              if (font<25) d=1;
              repaint();
              if (font==66) font=65;
              try{
                 Thread.sleep(25);
              }catch(InterruptedException e){}
              if (angle == 360) angle=0;      
          }
     }

     public void update(Graphics g){
          paint(g);
     }

     public void paint(Graphics g){
          Font f = new Font("Arial",Font.BOLD,font);
          offscreenG.setColor(Color.white);
          offscreenG.fillRect(0,0,1500,500);          
          offscreenG.setColor(Color.black);
          offscreenG.setFont(f);
          offscreenG.drawImage(picbuttom,215,145,this);
          offscreenG.drawString(name,x+d,y-d);
          offscreenG.setColor(darkblue);
          offscreenG.drawString(name,x,y);
          offscreenG.drawImage(pictop,255,30,this);
          g.drawImage(offscreenImage,0,0,this);
     }
}