Cna someone help me with this java program. I have 2 errors and lost on how to fix it (I have been struggling awhile with this due to study for finals). The errors I am getting are :

Exception in thread "main" java.lang.NullPointerException

at edu.waketech.ccave.provided.Spelunker.getLongDescription(Spelunker.java:103)

at edu.waketech.ccave.provided.CaveTestMain.main(CaveTestMain.java:20)

Below I have the code.

***************Spelunker Class:***********************

import java.util.ArrayList;

import edu.waketech.ccave.common.CCaveElement;

import edu.waketech.ccave.common.Direction;

import edu.waketech.ccave.common.ItemDirectory;

import edu.waketech.ccave.common.RoomDirectory;

import edu.waketech.ccave.item.CCaveItem;

import edu.waketech.ccave.location.CCaveRoom;

/**

* Our fearless spelunker.

*

* We track the inventory of Items that we're carrying by assigning them the

* location SPELUNKER_ID. It's not really a "CCaveRoom," but it is a unique

* String and can let us identify the items we're carrying versus the items that

* we're not.

*

*

* If we were doing a Model-View-Controller design pattern for this game (and

* we're close, but not quite there), this would be our controller. The types

* associated with Rooms and Items would be our data model.

*

*

*/

public class Spelunker implements CCaveElement {

/**

*

*/

private static final long serialVersionUID = 1786845014557682582L;

public static final String SPELUNKER_ID = "spelunker";

public RoomDirectory roomDirec = RoomDirectory.getInstance();

private CCaveRoom currentLocation;

/**

* Create a spelunker with a given name and starting location.

*

* @param startRoom

* Were We Start

*/

public Spelunker(String startRoom) {

currentLocation = roomDirec.get(startRoom);

}

/**

* Assign the spelunker to the given location

*

* @param location will become the current location of the spelunker

*/

public void setLocation(CCaveRoom location) {

this.currentLocation = location;

}

/**

* Move the player from the current location in the given direction. Update our

* state as appropriate.

*

*

* @param direction

* Direction to move

*/

public void move(CCaveRoom direction) {

currentLocation = currentLocation.nextRoom(direction);

}

/**

* Take some action on an inventory item--pick it up, drop it, etc.

*

* Dropped items are assigned to be in our current location. Items that are

* picked up are assigned the location SPELUNKER_ID.

*

* @param whatToDo

* the command to perform, like GET or DROP

* @param objectOfAction

* the item to pick up or drop or do whatever with

*/

public void changeInventory(ItemCommand whatToDo, String objectOfAction) {

ItemDirectory itemDirec = ItemDirectory.getInstance();

if (whatToDo == ItemCommand.GET) {

CCaveItem itemObj = itemDirec.get(objectOfAction);

if (itemObj != null)

itemObj.setLocation(SPELUNKER_ID);

;

} else if (whatToDo == ItemCommand.DROP) {

CCaveItem itemObj = itemDirec.get(objectOfAction);

if (itemObj != null) {

itemObj.setLocation(currentLocation.getId());

}

}

}

// NOT I18N CAPABLE

@Override

public String getLongDescription() {

String cRoom = currentLocation.getLongDescription();

String roomInventory = currentLocation.getContentsLongDescription();

StringBuilder youHave = new StringBuilder();

youHave.append("you have ");

ItemDirectory direc = ItemDirectory.getInstance();

ArrayList contents = direc.getItemsInRoom(SPELUNKER_ID);

for (CCaveItem ele : contents) {

youHave.append(ele.getLongDescription());

youHave.append(" ");

}

return "You are in " + cRoom + " In here is" + roomInventory + " and you have " + youHave.toString();

}

// NOT I18N CAPABLE

@Override

public String getShortDescription() {

String cRoom = currentLocation.getShortDescription();

StringBuilder youHave = new StringBuilder();

youHave.append("you have ");

ItemDirectory direc = ItemDirectory.getInstance();

ArrayList contents = direc.getItemsInRoom(SPELUNKER_ID);

for (CCaveItem ele : contents) {

youHave.append(ele.getShortDescription());

}

return "You are in " + cRoom + " and has " + youHave;

}

@Override

public String getId() {

return SPELUNKER_ID;

}

@Override

public boolean isId(String identifier) {

return SPELUNKER_ID.equalsIgnoreCase(identifier);

}

/**

* If we get a command that's classified as "OTHER," we find the item being

* manipulated and rely on it to do whatever specific processing is necessary.

*

* @param cmd

* The command to be executed

*

* @param item

* the item being manipulated

*/

public void otherCommand(ItemCommand cmd, String item) {

// if we can identify the item, we'll operate on it and it alone

CCaveItem caveItem = ItemDirectory.getInstance().get(item);

if (caveItem != null) {

caveItem.executeCommand(cmd, item, currentLocation);

}

}

public Direction move(Direction dir) {

// TODO Auto-generated method stub

return dir;

}

}

********************CaveTestMain Class:*******************

import java.io.IOException;

import edu.waketech.ccave.common.Direction;

/**

* A place with a main method where we can code some tests of our cave code.

*

* @author parks

*

*/

public class CaveTestMain {

public static void main(String[] args) throws IOException {

// First some sanity checks.

// CCaveMap caveMap = CCaveMap.accessMap();

Spelunker me = new Spelunker("endofroad");

System.out.println(me.getLongDescription());

me.move(Direction.S);

System.out.println(me.getLongDescription());

me.move(Direction.N);

System.out.println(me.getLongDescription());

me.move(Direction.E);

System.out.println(me.getLongDescription());

}

}

************RoomDirectory Class:*********************

import java.util.ArrayList;

import edu.waketech.ccave.location.Bathroom;

import edu.waketech.ccave.location.Bedroom;

import edu.waketech.ccave.location.CCaveRoom;

import edu.waketech.ccave.location.Dining;

import edu.waketech.ccave.location.EndOfRoad;

import edu.waketech.ccave.location.Garage;

import edu.waketech.ccave.location.Garden;

import edu.waketech.ccave.location.Kitchen;

import edu.waketech.ccave.location.Lounge;

import edu.waketech.ccave.location.PoolRoom;

import edu.waketech.ccave.location.Tunnels;

import edu.waketech.ccave.location.Washroom;

import edu.waketech.ccave.location.Wellhouse;

public class RoomDirectory {

private ArrayList caveRoom = new ArrayList<>();

private static RoomDirectory instance = new RoomDirectory();

private final CCaveRoom[] ALL_ITEMS = {

new Bathroom(),

new Bedroom(),

new CCaveRoom(),

new Dining(),

new EndOfRoad(),

new Garage(),

new Garden(),

new Kitchen(),

new Tunnels(),

new Washroom(),

new Wellhouse(),

new PoolRoom(),

new Lounge(),

};

private RoomDirectory() {

for (CCaveRoom cci: ALL_ITEMS) {

caveRoom.add(cci);

}

}

public static RoomDirectory getInstance() {

return instance;

}

public boolean contains(java.lang.String id) {

for (CCaveRoom ele : caveRoom) {

if ( ele.getId().equalsIgnoreCase(id))

return true;

}

return false;

}

public int indexOf(java.lang.String id) {

int i = 0;

for (i = 0; i < caveRoom.size(); i++) {

if (( caveRoom.get(i)).getId().equalsIgnoreCase(id))

return i;

}

return -1;

}

public boolean remove(java.lang.String id) {

int i = -1;

boolean found = false;

while (!found) {

i++;

if (( caveRoom.get(i)).getId().equalsIgnoreCase(id))

found = true;

}

if (i < caveRoom.size()) {

caveRoom.remove(i);

return true;

}

return false;

}

public CCaveRoom get(java.lang.String id) {

int i = indexOf(id);

if (i == -1) return null;

return caveRoom.get(i);

}

}