Java小程序编写 世界杯

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); } }