java编写的space invader游戏，开放源代码

package com.zhj; import java.awt.BorderLayout; import java.awt.Color; import java.awt.FlowLayout; import java.awt.GridLayout; import java.awt.Point; import java.awt.Rectangle; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.HashMap; import javax.swing.JButton; import javax.swing.JDialog; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.SwingConstants; import javax.swing.border.EtchedBorder; public class Game extends JFrame { /** * */ private static final long serialVersionUID = 7637532487372849088L; private static final SimpleDateFormat format = new SimpleDateFormat( "MMM yyyy HH:mm"); private Boolean pause; private JMenuBar menuBar; private JMenu operationMenu; private JMenuItem startItem; private JMenuItem pauseItem; private JMenuItem exitItem; private GameDiasplay displayPanel; private MenuActionListener menuActionListenner; private ShipEntity ship; private ArrayList<InvaderEntity> invaders; private ArrayList<ShotEntity> shots; private long fireTime; private long previousInvaderMove; private HashMap<Integer, InvaderEntity> stableInvaders; private JPanel statusPanel; private JLabel lifeLabel; private JLabel scoreLabel; private int lifeNum = 3; private int invaderNum = 72; private int totalPtx = 0; private long invaderMovePeriod = 3000; private int ptx_level = 1; private File recordFile; private JDialog rankDialog; private ArrayList<Record> records; public Game() { try { initData(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); JOptionPane.showConfirmDialog(this, "Couldn't open and create the history records", "Warning", JOptionPane.WARNING_MESSAGE); } createContainer(); openHistoryDialog(); } /** * * @throws IOException */ private void initEntities() throws IOException { if (ship == null) { ship = new ShipEntity(Constants.center_direction, true, new Point( 400, Constants.baseLine - Constants.size_ship), new Rectangle(Constants.size_ship, Constants.size_ship), Constants.speed_2); } else { ship.setPosition(new Point(400, Constants.baseLine - Constants.size_ship)); } if (invaders == null) { invaders = new ArrayList<InvaderEntity>(); } if (stableInvaders == null) { stableInvaders = new HashMap<Integer, InvaderEntity>(); } InvaderEntity invader = null; int lineNumber = 0; int rowNumber = 0; int seperateNumber = invaderNum / 3; if (seperateNumber > 24) { seperateNumber = 24; } for (int i = 0; i < invaderNum; i++) { if (i % seperateNumber == 0) { lineNumber++; rowNumber = 0; } rowNumber++; invader = new InvaderEntity(i, Constants.center_direction, true, new Point(Constants.begin_blank + rowNumber * Constants.size_invader + Constants.size_blank, lineNumber * Constants.size_invader + Constants.size_blank), new Rectangle( Constants.size_invader, Constants.size_invader), Constants.speed_l, ptx_level); invaders.add(invader); stableInvaders.put(i, invader); } if (shots == null) { shots = new ArrayList<ShotEntity>(); } } /** * read history records form file * * @throws IOException */ private void initData() throws IOException { recordFile = new File("record.data"); if (!recordFile.exists()) { recordFile.createNewFile(); records = new ArrayList<Record>(); for (int i = 0; i < 5; i++) { records.add(new Record(new Date(), "anonymity", 0)); } } else { if (recordFile.length() == 0) { records = new ArrayList<Record>(); for (int i = 0; i < 5; i++) { records.add(new Record(new Date(), "anonymity", 0)); } } else { ObjectInputStream input = null; try { input = new ObjectInputStream(new FileInputStream( recordFile)); Object object = input.readObject(); records = (ArrayList<Record>) object; } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { input.close(); input = null; } } } } /** * write the best rank to external file * * @throws IOException * @throws FileNotFoundException */ private void writeData(){ records.remove(5); ObjectOutputStream writer = null; try { if (!recordFile.exists()) { recordFile.createNewFile(); } writer = new ObjectOutputStream( new FileOutputStream(recordFile)); writer.writeObject(records); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); JOptionPane.showMessageDialog(this, "The record file may not exist", "Warning", JOptionPane.ERROR_MESSAGE); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); JOptionPane.showMessageDialog(this, "Could not save the record data", "Warning", JOptionPane.ERROR_MESSAGE); }finally { if(writer !=null) { try { writer.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); writer = null; } } } } /** * if the user break the record,return a new record, else return null * * @return */ private Record breakRecord() { Record record = null; for (int i = 0; i < records.size(); i++) { record = records.get(i); if (totalPtx > record.getScore()) { Record newRecord = new Record(new Date(), "anonymity", totalPtx); records.add(i, newRecord); return newRecord; } } return null; } /** * generate root container */ protected void createContainer() { setLayout(new BorderLayout()); setTitle("Space Invader"); menuBar = new JMenuBar(); operationMenu = new JMenu("Operation"); operationMenu.setToolTipText("operation about the game"); startItem = new JMenuItem("Start new game"); startItem.setActionCommand("start"); pauseItem = new JMenuItem("Pause the game"); pauseItem.setActionCommand("pause"); pauseItem.setEnabled(false); exitItem = new JMenuItem("Exit game"); exitItem.setActionCommand("exit"); menuActionListenner = new MenuActionListener(); startItem.addActionListener(menuActionListenner); pauseItem.addActionListener(menuActionListenner); exitItem.addActionListener(menuActionListenner); menuBar.add(operationMenu); operationMenu.add(startItem); operationMenu.add(pauseItem); operationMenu.addSeparator(); operationMenu.add(exitItem); statusPanel = new JPanel(); statusPanel.setLayout(new GridLayout(1, 6)); JLabel label1 = new JLabel("Lives:"); label1.setHorizontalAlignment(SwingConstants.CENTER); label1.setVerticalAlignment(SwingConstants.TOP); statusPanel.add(label1); lifeLabel = new JLabel("3"); lifeLabel.setHorizontalAlignment(SwingConstants.CENTER); lifeLabel.setVerticalAlignment(SwingConstants.CENTER); statusPanel.add(lifeLabel); statusPanel.add(new JLabel("")); statusPanel.add(new JLabel("")); JLabel label2 = new JLabel("Scores:"); label2.setHorizontalAlignment(SwingConstants.CENTER); statusPanel