類之間的私人方法調用

Question

試圖讓區域連接以顯示。正如你所看到的，我已經嘗試過（用我很瞭解的）來用nextArea方法替換這個方法。將GameWorld類放在這個之下。請注意，我不希望有人爲我完成這項工作，只需指出我的方向。

/** 
    * Auto Generated Java Class. 
    */ 
    import java.util.Scanner; 

public class WereWolfenstein2D { 
    GameWorld gameOne = new GameWorld(true); 
    private boolean tracing = false; 
    Scanner sc = new Scanner(System.in); 
    String input, answer, restart; 
    int walk, current; 
    char area; 

     public void explain() { 
     System.out.print("You are a hunter, defend the village and capture the     Werewolf by shooting it three times. "); 
    System.out.println("If you get bitten visit the village to be cured. " + 
    "If you get bitten twice you'll turn." +  
    "If none of the town folk survive, you lose. " + 
    "Now choose how what circumstances you're willing to work in."); 

    } 
     public void pickDifficulity(){ 
    { 
    System.out.println("Easy, Normal or Hard?"); 
    input = sc.nextLine(); 
    input = input.toUpperCase(); 
    if (input.equals("EASY")){ 
     System.out.println(Difficulty.EASY); 
     } 
    else if (input.equals("NORMAL")) { 
    System.out.println(Difficulty.NORMAL); 
    } 
    else if (input.equals("HARD")) { 
    System.out.println(Difficulty.HARD); 

    } 
} 


    } 
    public void preMove(){ 
      System.out.println("current stats"); 

     // no. of actions until dawn 
       gameOne.checkForDawn(); 
// current population 
       gameOne.getVillagePopulation(); 
// if they can hear village 
       gameOne.isVillageNear(); 

// if not bitten: 
       gameOne.getShotCount(); 
// current area no. 
       gameOne.getCurrentArea(); 
// number of connecting areas 
      // gameOne.nextArea(char direction); 

       //gameOne.areasConnected(int s1, int s2); 
// no of times werewolf shot 

// no. of bullets left 
       gameOne.getShotCount(); 
// if the player can smell the wolf 
        gameOne.werewolfNear(); 
     } 
     public void pickMove(){ 
System.out.print("walk shoot, quit or reset?"); 
answer = sc.nextLine(); 
//walk 
//if area not connected: alert 
//if into village: alert that they are healed 
//if containing wolf: altert they are bitten, if already bitten game ends 

switch(answer) { 
       case "walk": System.out.println("Pick a direction to walk in south(s), east(e), north(n), west(w)"); 
          current = gameOne.getCurrentArea(); //current area they are in 
          char direction = sc.next().charAt(current); //direction they wish to travel 

          // char area = sc.next().charAt(current); 
          char area1 = 's'; 
          char area2 = 'e'; 
          char area3 = 'n'; 
          char area4 = 'w'; 

          System.out.println("the area to the south is: " + gameOne.nextArea(area1));        
          System.out.println("the area to the east is: " + gameOne.nextArea(area2)); 
          System.out.println("the area to the north is: " + gameOne.nextArea(area3)); 
          System.out.println("the area to the west is: " + gameOne.nextArea(area4)); 
          System.out.println(current +"<< >>" + direction); 
          System.out.println("pick again"); 
          int newcurrent = direction; 
          direction = sc.next().charAt(newcurrent); 
          System.out.println(newcurrent + "<<new>>" + direction); 

         break;  
       case "shoot": 


         break; 
       case "quit": System.out.print("would you like to start again? (yes/no)"); 
          restart = sc.nextLine(); 
          if (restart.equals("yes")) { 
           gameOne.reset(); 
          } 
          else { 
           System.out.println("Thanks for playing"); 
          } 
        break; 

       case "reset": //gameOne.reset(); 
          this.pickDifficulity(); 
         break; 
          } 
          } 




     public void play() { 
     this.explain(); 
     this.pickDifficulity(); 
     this.preMove(); 
     this.pickMove(); 
     // gameOne.reset(); 
      } 

     public void setTracing(boolean onOff) { 
     tracing = onOff; 
     } 

     public void trace(String message) { 
     if (tracing) { 
     System.out.println("WereWolfenstein2D: " + message); 
      } 
     } 


     } 

遊戲世界CLASS >>> 公共類遊戲世界{

// Final instance variables 
public final int NIGHT_LENGTH = 3;  // three actions until dawn arrives (day is instantaneous) 
private final int MAX_SHOTS_NEEDED = 3; // successful hits required to subdue werewolf 

//This map is _deliberately_ confusing, although it actually a regular layout 
private int[] east = {1,2,0,4,5,3,7,8,6}; // areas to east of current location (index) 
private int[] west = {2,0,1,5,3,4,8,6,7}; // areas to west of current location (index) 
private int[] north = {6,7,8,0,1,2,3,4,5}; // areas to north of current location (index) 
private int[] south = {3,4,5,6,7,8,0,1,2}; // areas to south of current location (index) 
private int numAreas = south.length;  // number of areas in the "world" 

// Non-final instance variables 
private int currentArea; // current location of player 
private int villagePos;  // area where the village is located 
private int wolfPos;  // area where the werewolf can be found 

private Difficulty level; // difficulty level of the game 
private int villagerCount; // number of villagers remaining 
private int stepsUntilDawn; // number of actions until night falls 

private boolean isBitten; // is the player currently bitten and in need of treatment? 
private int hitsRemaining; // number of shots still needed to subdue the werewolf 

private Random generator; // to use for random placement in areas 
private boolean tracing; // switch for tracing messages 


/** 
* Creates a game world for the WereWolfenstein 2D game. 
* @param traceOnOff whether or not tracing output should be shown 
*/ 
public GameWorld(boolean traceOnOff) { 
    trace("GameWorld() starts..."); 
    generator = new Random(); 
    generator.setSeed(101); //this default setting makes the game more predictable, for testing 
    setTracing(traceOnOff); //this may replace random number generator   
    trace("...GameWorld() ends"); 
} 


/** 
* Returns the number of the current area. 
* @return which area number player is within 
*/ 
public int getCurrentArea() { 
    trace("getCurrentArea() starts... ...and ends with value " + currentArea); 
    return currentArea; 
} 


/** 
* Returns the number of shot attempts, formatted as "total hits/total required" 
* @return the fraction of shots that have hit the werewolf (out of the required number of hits) 
*/ 
public String getShotCount() { 
    String count; // formatted total 

    trace("getShotCount() starts..."); 
    count = (MAX_SHOTS_NEEDED - hitsRemaining) + "/" + MAX_SHOTS_NEEDED; 
    trace("getShotCount() ...ends with value " + count); 
    return count; 
} 


/** 
* Returns the current number of villagers. 
* @return the villager count, >= 0 
*/ 
public int getVillagePopulation() { 
    return villagerCount; 
} 


/** 
* Returns the number of actions remaining until dawn arrives. 
* @return actions remaining until dawn event 
*/ 
public int getActionsUntilNight() { 
    return stepsUntilDawn; 
} 


/** 
* Randomly determines a unique starting location (currentArea), village 
* position (villagePos) and werewolf position (wolfPos). 
* @param difficulty - the difficulty level of the game 
* @return the starting location (area) 
*/ 
public int newGame(Difficulty difficulty) { 
    trace("newGame() starts..."); 

    level = difficulty; 

    //determine village location and initialise villagers and night length 
    villagePos = generator.nextInt(numAreas); 
    stepsUntilDawn = NIGHT_LENGTH; 
    villagerCount = level.getVillagerCount(); 

    // determine player's position 
    if (level.getPlayerStartsInVillage()) { 
     //place player in village 
     currentArea = villagePos; 
    } else { 
     //pick a random location for player away from the village 
     do { 
      currentArea = generator.nextInt(numAreas); 
     } while (currentArea == villagePos); 
    } 
    trace("player starts at " + currentArea); 

    // determine werewolf's position 
    trace("calling resetTargetPosition()"); 
    resetWolfPosition(); 

    // define player's status 
    trace("player is not bitten"); 
    isBitten = false; 
    trace("werewolf is not hit"); 
    hitsRemaining = MAX_SHOTS_NEEDED; 

    trace("...newGame() ends with value " + currentArea); 
    return currentArea; 
} 


/** Randomly determines a unique location for werewolf (wolfPos). */ 
private void resetWolfPosition() { 
    int pos; // werewolf position 

    trace("resetWolfPosition() starts..."); 

    pos = generator.nextInt(numAreas); 
    while (pos == currentArea || pos == villagePos) { 
     trace("clash detected"); 
     // avoid clash with current location 
     pos = generator.nextInt(numAreas); 
    } 

    wolfPos = pos; 
    trace("werewolf position is " + wolfPos); 

    trace("...resetWolfPosition() ends"); 
} 


/** 
* Returns the nearness of the werewolf. 
* @return Status of werewolf's location 
* BITTEN: if player is currently bitten (and delirious) 
* NEAR: if werewolf is in a connected area 
* FAR: if werewolf is elsewhere 
*/ 
public Result werewolfNear() { 
    trace("werewolfNear() starts"); 
    if (isBitten) { 
     trace("werewolfNear(): player is still delirious from a bite so cannot sense nearness of werewolf"); 
     return Result.BITTEN; 
    } 
    trace("werewolfNear() returning result of nearnessTo(" + wolfPos + ")"); 
    return nearnessTo(wolfPos); 
} 


/** 
* Returns true if the village is near the player (in an adjacent area), 
* false otherwise. 
* @return true if the player is near (but not in) the village, false otherwise. 
*/ 
public boolean isVillageNear() { 
    trace("villageNear() starts and returns result of nearnessTo(" + villagePos + ") == Result.NEAR"); 
    return nearnessTo(villagePos) == Result.NEAR; 
} 


/** 
* Returns the nearness of the player to the nominated area. 
* @param area the area (werewolf or village) to assess 
* @return Nearness of player to nominated area 
* NEAR: if player is adjacent to area 
* FAR: if player is not adjacent to the area 
*/ 
private Result nearnessTo(int area) { 
    Result closeness; // closeness of player to area 

    trace("nearnessTo() starts..."); 
    if ((east[currentArea] == area) || 
     (west[currentArea] == area) || 
     (north[currentArea] == area) || 
     (south[currentArea] == area)) 
    { 
     // player is close to area 
     closeness = Result.NEAR; 
     trace("area is close"); 
    } else { 
     // player is not adjacent to area 
     closeness = Result.FAR; 
     trace("area is far"); 
    } 

    trace("...nearnessTo() ends with value " + closeness); 

    return closeness; 
} 


/** 
* Try to move the player to another area. If the move is not IMPOSSIBLE 
* then the number of actions remaining before dawn arrives is decremented. 
* @param into the area to try to move into 
* @return Result of the movement attempt 
* SUCCESS: move was successful (current position changed) 
* VILLAGE: move was successful and player has arrived in the village (and is not longer bitten) 
* BITTEN: move was successful but player encountered the werewolf 
* FAILURE: move was successful but already bitten player encountered the werewolf again 
* IMPOSSIBLE: move was impossible (current position not changed) 
*/ 
public Result tryWalk(int into) { 
    Result result; // outcome of walk attempt 

    trace("tryWalk() starts..."); 

    if (areasConnected(currentArea, into)) { 
     trace("move into area " + into); 
     currentArea = into; 
     if (currentArea != wolfPos) { 
      // werewolf not found 
      trace("werewolf not encountered"); 
      result = Result.SUCCESS; 

      if (currentArea == villagePos) { 
       isBitten = false; 
       result = Result.VILLAGE; 
      } 
     } else { 
      // werewolf encountered 
      if (isBitten) { 
       trace("werewolf encountered again"); 
       result = Result.FAILURE; 
      } else { 
       // not bitten 
       trace("werewolf encountered"); 
       result = Result.BITTEN; 
       isBitten = true; 
       resetWolfPosition();      
      } 
     } 
     stepsUntilDawn--; //one more action taken 
    } else { // area not connected 
     trace("move not possible"); 
     result = Result.IMPOSSIBLE; 
    } 

    trace("...tryWalk() ends with value " + result); 

    return result; 
} 


/** 
* Try to shoot a silver bullet at the werewolf from the current area. 
* If the shot is not IMPOSSIBLE then the number of actions remaining 
* before dawn arrives is decremented. 
* @param into the area to attempt to shoot into 
* @return status of attempt 
* CAPTURED: werewolf has been subdued and captured 
* SUCCESS: werewolf has been hit but is not yet captured 
* VILLAGE: the shot went into the village and a villager has died 
* FAILURE: werewolf not present 
* IMPOSSIBLE: area not connected 
*/ 
public Result shoot(int into) { 
    Result result; // outcome of shooting attempt 

    trace("shoot() starts..."); 

    if (areasConnected(currentArea, into)) { 
     // area connected 
     trace("shoot into area " + into); 
     if (into == villagePos) { 
      result = Result.VILLAGE; 
      villagerCount--; 
      trace("shot into village"); 
     } else if (into != wolfPos) { 
      // not at werewolf location (but at least didn't shoot into the village!) 
      result = Result.FAILURE; 
      trace("werewolf not present"); 
     } else { 
      // at werewolf location 
      hitsRemaining--; 
      if (hitsRemaining == 0) { 
       // last hit required to subdue the werewolf 
       trace("werewolf subdued and captured"); 
       result = Result.CAPTURED; 
      } else { 
       // not the last shot 
       result = Result.SUCCESS; 
       if (level.getWolfMovesWhenShot()) { 
        resetWolfPosition(); 
       } 
       trace("werewolf found but not yet captured"); 
      } 
     } 
     stepsUntilDawn--; //one more action taken 
    } else { 
     // not at valid location 
     result = Result.IMPOSSIBLE; 
     trace("area not present"); 
    } 

    trace("...shoot() ends with value " + result); 

    return result; 
} 


/** 
* Checks if there are no more actions left until dawn arrives. If dawn is 
* here then decrements the number of villagers, repositions the werewolf 
* and resets the number of actions until dawn arrives again. Returns true 
* if dawn occurred, false if it did not. 
* @return true if dawn just happened, false if has not yet arrived 
*/ 
public boolean checkForDawn() { 
    if (stepsUntilDawn == 0) { 
     if (villagerCount > 0) { //dawn may arrive after shooting the last villager 
      villagerCount--; 
     } 
     stepsUntilDawn = NIGHT_LENGTH; 
     resetWolfPosition(); 
     return true; 
    } 
    return false; 
} 


/** 
* Returns true if areas s1 and s2 are connected, false otherwise. 
* Also returns false if either area is an invalid area identifier. 
* @param s1 the first area 
* @param s2 the second area 
* @return true if areas are connected, false otherwise 
*/ 
private boolean areasConnected(int s1, int s2) { 
    if (Math.min(s1, s2) >= 0 && Math.max(s1, s2) < numAreas) { //valid areas... 
     //...but are they connected? 
     return east[s1] == s2 || north[s1] == s2 || west[s1] == s2 || south[s1] == s2; 
    } 
    //Either s1 or s2 is not a valid area identifier 
    return false; 
} 


/** 
* Determine ID number of an adjacent area given its direction from the 
* current area. 
* @param direction the direction to look (n for north, e for east, s for south, w for west) 
* @return number of the area in that direction 
* @throws IllegalArgumentException if direction is null 
*/ 
public int nextArea(char direction) { 
    int nextIs; // area number of area in indicated direction 

    //Valid values 
    final char N = 'n', E = 'e', S = 's', W = 'w'; 

    trace("nextArea() starts..."); 

    // examine adjacent areas 
    switch (direction) { 
     case N: trace("determining number of area to the north"); 
       nextIs = north[currentArea]; 
       break; 
     case E: trace("determining number of area to the east"); 
       nextIs = east[currentArea]; 
       break; 
     case S: trace("determining number of area to the south"); 
       nextIs = south[currentArea]; 
       break; 
     case W: trace("determining number of area to the west"); 
       nextIs = west[currentArea]; 
       break; 
     default: throw new IllegalArgumentException("Direction must be one of " + N + ", " + E + ", " + S + " or " + W); 
    } 

    trace("...nextArea() ends with value for '" + direction + "' of " + nextIs); 

    return nextIs; 
} 


/** Resets all game values. */ 
public void reset() { 
    trace("reset() starts..."); 

    // reset all game values 
    trace("resetting all game values"); 
    newGame(level); //start a new game with the same difficulty 

    trace("...reset() ends"); 
} 


/** 
* Turn tracing messages on or off. If off then it is assumed that 
* debugging is not occurring and so a new (unseeded) random number 
* generator is created so the game is unpredictable. 
* @param shouldTrace indicates if tracing messages should be displayed or not 
*/ 
public void setTracing(boolean shouldTrace) { 
    if (! shouldTrace) { // not tracing so get an unseeded RNG 
     generator = new Random(); 
    } 
    tracing = shouldTrace; 
} 

/** 
* Prints the given tracing message if tracing is enabled. 
* @param message the message to be displayed 
*/ 
public void trace(String message) { 
    if (tracing) { 
     System.out.println("GameWorld: " + message); 
    } 
} 

}

Answer 1

您可以使用reflection。實際上，如果您想直接訪問對象或類的私有方法/字段，這是唯一的出路。