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Java ¶íÂÞ˹·½¿é

import java.awt.*;
import java.awt.event.*;
//¶íÂÞ˹·½¿éÀà
public class ERS_Block extends Frame{
 public static boolean isPlay=false;
 public static int level=1,score=0;
 public static TextField scoreField,levelField;
 
 public static MyTimer timer;
 GameCanvas gameScr;
 
 public static void main(String[] argus){
  ERS_Block ers = new ERS_Block("¶íÂÞ˹·½¿éÓÎÏ· V1.0 Author:Vincent");
  WindowListener win_listener = new WinListener();
  ers.addWindowListener(win_listener);
 }
 
 //¶íÂÞ˹·½¿éÀàµÄ¹¹Ôì·½·¨
 ERS_Block(String title){
  super(title);
 
  setSize(600,480);
  setLayout(new GridLayout(1,2));
 
  gameScr = new GameCanvas();
  gameScr.addKeyListener(gameScr);
 
  timer = new MyTimer(gameScr);
  timer.setDaemon(true);
  timer.start();
  timer.suspend();
 
  add(gameScr);
 
  Panel rightScr = new Panel();
  rightScr.setLayout(new GridLayout(2,1,0,30));
  rightScr.setSize(120,500);
  add(rightScr);
 
  //ÓÒ±ßÐÅÏ¢´°ÌåµÄ²¼¾Ö
  MyPanel infoScr = new MyPanel();
  infoScr.setLayout(new GridLayout(4,1,0,5));
  infoScr.setSize(120,300);
  rightScr.add(infoScr);
 
  //¶¨Òå±êÇ©ºÍ³õʼֵ
  Label scorep = new Label("·ÖÊý:",Label.LEFT);
  Label levelp = new Label("¼¶Êý:",Label.LEFT);
  scoreField = new TextField(8);
  levelField = new TextField(8);
  scoreField.setEditable(false);
  levelField.setEditable(false);
  infoScr.add(scorep);
  infoScr.add(scoreField);
  infoScr.add(levelp);
  infoScr.add(levelField);
  scorep.setSize(new Dimension(20,60));
  scoreField.setSize(new Dimension(20,60));
  levelp.setSize(new Dimension(20,60));
  levelField.setSize(new Dimension(20,60));
  score


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