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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it(getWaitTime()); } catch (Exception e) { } } if (myShouldPause) { synchronized (this) { try { wait(); } catch (Exception e) { } } } } } } /** * This class contains the data for a game currently in progress. used to store * a game and to resume a stored game. * * @author Carol Hamer */ class GameInfo { //-------------------------------------------------------- // fields /** * The name of the datastore. */ public static final String STORE = "GameInfo"; /** * This is set to true if an attempt is made to read a game when no game has * been saved. */ private boolean myNoDataSaved; /** * The number that indicates which board the player is currently on. */ private int myBoardNum; /** * The amount of time that has passed. */ private int myTime; /** * The coordinates of where the player is on the board. coordinate values * must be between 0 and 15. */ private int[] myPlayerSquare; /** * The coordinates of where the keys are currently found. MUST BE four sets * of two integer coordinates. coordinate values must be between 0 and 15. */ private int[][] myKeyCoords; /** * The list of which doors are currently open. 0 = open 1 = closed WARNING: * this array MUST have length 8. */ private int[] myDoorsOpen; /** * The number of the key that is currently being held by the player. if no * key is held, then the value is -1. */ private int myHeldKey; //-------------------------------------------------------- // data gets/sets /** * @return true if no saved game records were found. */ boolean getIsEmpty() { return (myNoDataSaved); } /** * @return The number that indicates which board the player is currently on. */ int getBoardNum() { return (myBoardNum); } /** * @return The number of the key that is currently being held by the player. * if no key is held, then the value is -1. */ int getHeldKey() { return (myHeldKey); } /** * @return The amount of time that has passed. */ int getTime() { return (myTime); } /** * @return The coordinates of where the player is on the board. coordinate * values must be between 0 and 15. */ int[] getPlayerSquare() { return (myPlayerSquare); } /** * @return The coordinates of where the keys are currently found. MUST BE * four sets of two integer coordinates. coordinate values must be * between 0 and 15. */ int[][] getKeyCoords() { return (myKeyCoords); } /** * @return The list of which doors are currently open. 0 = open 1 = closed * WARNING: this array MUST have length 8. */ int[] getDoorsOpen() { return (myDoorsOpen); } //-------------------------------------------------------- // constructors /** * This constructor records the game info of a game currently in progress. */ GameInfo(int boardNum, int time, int[] playerSquare, int[][] keyCoords, int[] doorsOpen, int heldKey) throws Exception { myBoardNum = boardNum; myTime = time; myPlayerSquare = playerSquare; myKeyCoords = keyCoords; myDoorsOpen = doorsOpen; myHeldKey = heldKey; encodeInfo(); } /** * This constructor reads the game configuration from memory. This is used * to reconstruct a saved game. */ GameInfo() { RecordStore store = null; try { // if the record store does not yet exist, don't // create it store = RecordStore.openRecordStore(STORE, false); if ((store != null) && (store.getNumRecords() > 0)) { // the first record has id number 1 // it should also be the only record since this // particular game stores only one game. byte[] data = store.getRecord(1); myBoardNum = data[0]; myPlayerSquare = DataConverter.decodeCoords(data[1]); myKeyCoords = new int[4][]; myKeyCoords[0] = DataConverter.decodeCoords(data[2]); myKeyCoords[1] = DataConverter.decodeCoords(data[3]); myKeyCoords[2] = DataConverter.decodeCoords(data[4]); myKeyCoords[3] = DataConverter.decodeCoords(data[5]); myDoorsOpen = DataConverter.decode8(data[6]); myHeldKey = data[7]; byte[] fourBytes = new byte[4]; System.arraycopy(data, 8, fourBytes, 0, 4); myTime = DataConverter.parseInt(fourBytes); } else { myNoDataSaved = true; } } catch (Exception e) { // this throws when the record store doesn't exist. // for that or any error, we assume no data is saved: myNoDataSaved = true; } finally { try { if (store != null) { store.closeRecordStore(); } } catch (Exception e) { // if the record store is open this shouldn't throw. } } } //-------------------------------------------------------- // encoding method /** * Turn the data into a byte array and save it. */ private void encodeInfo() throws Exception { RecordStore store = null; try { byte[] data = new byte[12]; data[0] = (new Integer(myBoardNum)).byteValue(); data[1] = DataConverter.encodeCoords(myPlayerSquare); data[2] = DataConverter.encodeCoords(myKeyCoords[0]); data[3] = DataConverter.encodeCoords(myKeyCoords[1]); data[4] = DataConverter.encodeCoords(myKeyCoords[2]); data[5] = DataConverter.encodeCoords(myKeyCoords[3]); data[6] = DataConverter.encode8(myDoorsOpen, 0); data[7] = (new Integer(myHeldKey)).byteValue(); byte[] timeBytes = DataConverter.intToFourBytes(myTime); System.arraycopy(timeBytes, 0, data, 8, 4); // if the record store does not yet exist, the second // arg "true" tells it to create. store = RecordStore.openRecordStore(STORE, true); int numRecords = store.getNumRecords(); if (numRecords > 0) { store.setRecord(1, data, 0, data.length); } else { store.addRecord(data, 0, data.length); } } catch (Exception e) { throw (e); } finally { try { if (store != null) { store.closeRecordStore(); } } catch (Exception e) { // if the record store is open this shouldn't throw. } } } } /** * This class contains the data |
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