一个J2ME地牢游戏的源码 |
| 作者：J2MEDEV 来源：J2MEDEV 发布时间：2006-7-25 9:06:59 |
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import java.io.*; import javax.microedition.lcdui.*; import javax.microedition.lcdui.game.*; import javax.microedition.midlet.*; import javax.microedition.rms.*; /** * This is the main class of the dungeon game. * * @author Carol Hamer */ public class Dungeon extends MIDlet implements CommandListener { //----------------------------------------------------- // game object fields /** * The canvas that the dungeon is drawn on. */ private DungeonCanvas myCanvas; /** * the thread that advances the game clock. */ private GameThread myGameThread; //----------------------------------------------------- // command fields /** * The button to exit the game. */ private Command myExitCommand = new Command("Exit", Command.EXIT, 99); /** * The command to save the game in progress. */ private Command mySaveCommand = new Command("Save Game", Command.SCREEN, 2); /** * The command to restore a previously saved game. */ private Command myRestoreCommand = new Command("Restore Game", Command.SCREEN, 2); /** * the command to start moving when the game is paused. */ private Command myGoCommand = new Command("Go", Command.SCREEN, 1); /** * the command to pause the game. */ private Command myPauseCommand = new Command("Pause", Command.SCREEN, 1); /** * the command to start a new game. */ private Command myNewCommand = new Command("Next Board", Command.SCREEN, 1); //----------------------------------------------------- // initialization and game state changes /** * Initialize the canvas and the commands. */ public Dungeon() { try { // create the canvas and set up the commands: myCanvas = new DungeonCanvas(this); myCanvas.addCommand(myExitCommand); myCanvas.addCommand(mySaveCommand); myCanvas.addCommand(myRestoreCommand); myCanvas.addCommand(myPauseCommand); myCanvas.setCommandListener(this); } catch (Exception e) { // if there's an error during creation, display it as an alert. errorMsg(e); } } /** * Switch the command to the play again command. (removing other commands * that are no longer relevant) */ void setNewCommand() { myCanvas.removeCommand(myPauseCommand); myCanvas.removeCommand(myGoCommand); myCanvas.addCommand(myNewCommand); } /** * Switch the command to the go command. (removing other commands that are * no longer relevant) */ void setGoCommand() { myCanvas.removeCommand(myPauseCommand); myCanvas.removeCommand(myNewCommand); myCanvas.addCommand(myGoCommand); } /** * Switch the command to the pause command. (removing other commands that * are no longer relevant) */ void setPauseCommand() { myCanvas.removeCommand(myNewCommand); myCanvas.removeCommand(myGoCommand); myCanvas.addCommand(myPauseCommand); } //---------------------------------------------------------------- // implementation of MIDlet // these methods may be called by the application management // software at any time, so we always check fields for null // before calling methods on them. /** * Start the application. */ public void startApp() throws MIDletStateChangeException { if (myCanvas != null) { if (myGameThread == null) { // create the thread and start the game: myGameThread = new GameThread(myCanvas); myCanvas.start(); myGameThread.start(); } else { // in case this gets called again after // the application has been started once: myCanvas.removeCommand(myGoCommand); myCanvas.addCommand(myPauseCommand); myCanvas.flushKeys(); myGameThread.resumeGame(); } } } /** * Stop the threads and throw out the garbage. */ public void destroyApp(boolean unconditional) throws MIDletStateChangeException { myCanvas = null; if (myGameThread != null) { myGameThread.requestStop(); } myGameThread = null; System.gc(); } /** * Pause the game. */ public void pauseApp() { if (myCanvas != null) { setGoCommand(); } if (myGameThread != null) { myGameThread.pause(); } } //---------------------------------------------------------------- // implementation of CommandListener /* * Respond to a command issued on the Canvas. (reset, exit, or change size * prefs). */ public void commandAction(Command c, Displayable s) { try { if (c == myGoCommand) { myCanvas.setNeedsRepaint(); myCanvas.removeCommand(myGoCommand); myCanvas.addCommand(myPauseCommand); myCanvas.flushKeys(); myGameThread.resumeGame(); } else if (c == myPauseCommand) { myCanvas.setNeedsRepaint(); myCanvas.removeCommand(myPauseCommand); myCanvas.addCommand(myGoCommand); myGameThread.pause(); } else if (c == myNewCommand) { myCanvas.setNeedsRepaint(); // go to the next board and restart the game myCanvas.removeCommand(myNewCommand); myCanvas.addCommand(myPauseCommand); myCanvas.reset(); myGameThread.resumeGame(); /*} else if (c == Alert.DISMISS_COMMAND) { // if there was a serious enough error to // cause an alert, then we end the game // when the user is done reading the alert: // (Alert.DISMISS_COMMAND is the default // command that is placed on an Alert // whose timeout is FOREVER) destroyApp(false); notifyDestroyed();*/ } else if (c == mySaveCommand) { myCanvas.setNeedsRepaint(); myCanvas.saveGame(); } else if (c == myRestoreCommand) { myCanvas.setNeedsRepaint(); myCanvas.removeCommand(myNewCommand); myCanvas.removeCommand(myGoCommand); myCanvas.addCommand(myPauseCommand); myCanvas.revertToSaved(); } else if (c == myExitCommand) { destroyApp(false); notifyDestroyed(); } } catch (Exception e) { errorMsg(e); } } //------------------------------------------------------- // error methods /** * Converts an exception to a me |
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