Hello All,

My code is giving me an OutOfBoundException runtime error, kindly help out

import java.io.*;

import java.util.*;

public class Hospital

{

static ArrayList Vertex = new ArrayList();

static ArrayList Path = new ArrayList();

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

{

Scanner in = new Scanner(System.in);

// read in vertices

File file = new File("Vertex.txt");

Scanner infile = new Scanner(file);

String Input = "";

while (infile.hasNextLine())

{

Input = infile.nextLine();

Vertex.add(new Room(Input));

}

//System.out.println(Vertex.size() + " vertices read from file");

// read in edges

file = new File("edge.txt");

infile = new Scanner(file);

String From, Direction, To;

int Count=0;

while (infile.hasNext())

{

Count++;

From = infile.next();

Direction = infile.next();

To = infile.next();

// locate From Vertex in ArrayList

int IndexFrom = 0;

while (!Vertex.get(IndexFrom).RoomName.equals(From))

{ IndexFrom++; }

// locate To Vertex in ArrayList

int IndexTo = 0;

while (!Vertex.get(IndexTo).RoomName.equals(To))

{ IndexTo++; }

// create edge

if (Direction.equals("North"))

{

Vertex.get(IndexFrom).North = Vertex.get(IndexTo);

Vertex.get(IndexTo).South = Vertex.get(IndexFrom);

}

if (Direction.equals("South"))

{

Vertex.get(IndexFrom).South = Vertex.get(IndexTo);

Vertex.get(IndexTo).North = Vertex.get(IndexFrom);

}

if (Direction.equals("East"))

{

Vertex.get(IndexFrom).East = Vertex.get(IndexTo);

Vertex.get(IndexTo).West = Vertex.get(IndexFrom);

}

if (Direction.equals("West"))

{

Vertex.get(IndexFrom).West = Vertex.get(IndexTo);

Vertex.get(IndexTo).East = Vertex.get(IndexFrom);

}

}

//System.out.println(Count + " edges read from file");

System.out.println("Press to Continue");

//Choice = in.nextLine();

//System.out.println(Vertex.get(0));

Room Temp = Vertex.get(0);

String Choice = " ";

while (!Choice.equals("q"))

{

System.out.println("You are in room " + Temp.RoomName);

System.out.println("Which direction (n, s, e, w) do you want to go? ");

Choice = in.next();

if (Choice.equals ("s") && Temp.South != null)

Temp = Temp.South;

else if (Choice.equals ("s") && Temp.South == null)

System.out.println("You can't go that way!");

else if (Choice.equals ("n") && Temp.North != null)

Temp = Temp.North;

else if (Choice.equals ("n") && Temp.North == null)

System.out.println("You can't go that way!");

else if (Choice.equals ("e") && Temp.East != null)

Temp = Temp.East;

else if (Choice.equals ("e") && Temp.East == null)

System.out.println("You can't go that way!");

else if (Choice.equals ("w") && Temp.West != null)

Temp = Temp.West;

else if (Choice.equals ("w") && Temp.West == null)

System.out.println("You can't go that way!");

}

System.out.println(Temp.South.North.East.West.RoomName);

}

}

class Room

{

String RoomName;

Room North, South, East, West;

boolean Visited; // used for Dijkstra

int Distance; // used for Dijkstra

Room (String theRoomName)

{ RoomName = theRoomName; }

}

here is the Vertex.txt

Entrance SecurityPost Parking Emergency Mortuary WardOne AdminBlock WardTwo Surgery Cafeteria Laboratory BloodBank WardThree

Here is the edge.txt

Entrance East Parking Entrance West SecurityPost Entrance South AdminBlock Cafeteria North AdminBlock Cafeteria West Surgery Cafeteria East Laboratory Cafeteria South WardThree SecurityPost East Entrance WardOne West Mortuary WardOne East AdminBlock WardOne South Surgery Parking West Entrance Parking East Emergency Parking South WardTwo Mortuary East WardOne AdminBlock North Entrance AdminBlock South Cafeteria AdminBlock West Surgery AdminBlock South WardThree Emergency West Parking Surgery North WardOne Surgery East Cafeteria Surgery South BloodBank BloodBank North Surgery BloodBank East WaedThree WardThree North Cafeteria WardThree West BloodBank WardTwo North Parking WardTwo West AdminBlock WardTwo South Laboratory Laboratory North WardTwo Laboratory West Cafeteria