HELP WITH PROGRAM URGENT

Fri, 06 Nov 2009 17:19:59 -0800

Hi every one so have to write this simple CD / Video library program
I have written the program and it compiles and does the first 2 things on the menu and then will do the others but give me an error

here is the program code:
import java.io.*;

class librarymanagement

{

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

{

BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in));

int choice;

String strTemp;

String strComp = "text";

int posCD = 0;

int posMovie = 0;

int searchPos = (-1);

String [][] LibraryDB_CD = new String[100][2];

String [][] LibraryDB_Movie = new String[100][2];

LibraryDB_CD[posCD][0] = "coldplay a rush of blood to the head";

LibraryDB_CD[posCD][1] = "Available for renting";

posCD = posCD + 1;

LibraryDB_CD[posCD][0] = "coldplay parachutes";

LibraryDB_CD[posCD][1] = "Available for renting";

posCD = posCD + 1;

LibraryDB_CD[posCD][0] = "coldplay x&y";

LibraryDB_CD[posCD][1] = "Available for renting";

posCD = posCD + 1;

LibraryDB_CD[posCD][0] = "jonas brothers a little bit longer";

LibraryDB_CD[posCD][1] = "Available for renting";

posCD = posCD + 1;

LibraryDB_CD[posCD][0] = "jonas brothers jonas brothers";

LibraryDB_CD[posCD][1] = "Available for renting";

posCD = posCD + 1;

LibraryDB_Movie[posMovie][0] = "pride and prejudice";

LibraryDB_Movie[posMovie][1] = "Available for renting";

posMovie = posMovie + 1;

LibraryDB_Movie[posMovie][0] = "lord of the rings vol1";

LibraryDB_Movie[posMovie][1] = "Available for renting";

posMovie = posMovie + 1;

LibraryDB_Movie[posMovie][0] = "lord of the rings vol2";

LibraryDB_Movie[posMovie][1] = "Available for renting";

posMovie = posMovie + 1;

LibraryDB_Movie[posMovie][0] = "lord of the rings vol3";

LibraryDB_Movie[posMovie][1] = "Available for renting";

posMovie = posMovie + 1;

LibraryDB_Movie[posMovie][0] = "pirates of the caribbean 1";

LibraryDB_Movie[posMovie][1] = "Available for renting";

posMovie = posMovie + 1;

do{
System.out.println("\nLibrary DB Management System: \n");

System.out.println("1: Add a CD to Library DB");

System.out.println("2: Add a Movie to Library DB");

System.out.println("3: Check Status of a CD");

System.out.println("4: Check Status of Movie");

System.out.println("5: Return a CD");

System.out.println("6: Return a Movie");

System.out.println("7: Rent a CD");

System.out.println("8: Rent a Movie");

System.out.println("0: Exit\n");

System.out.print("Which option would you like to run: ");

strTemp = dataIn.readLine();

choice = Integer.parseInt(strTemp);

if(choice == 0)

{

System.out.print("\nThank you for using Library DB Management System");

}

if(choice == 1)

{

System.out.print("\nEnter the CD name: ");

LibraryDB_CD[posCD][0] = dataIn.readLine().toLowerCase();

LibraryDB_CD[posCD][1] = "Available for renting";

posCD = posCD + 1;
System.out.print("\ndone");

}

if(choice == 2)

{

System.out.print("\nEnter the Movie name: ");

LibraryDB_Movie[posMovie][0] = dataIn.readLine().toLowerCase();

LibraryDB_Movie[posMovie][1] = "Available for renting";

posMovie = posMovie + 1;

}

if(choice == 3)

{

System.out.print("\nEnter the CD name: ");

strComp = dataIn.readLine().toLowerCase();

for (int i=0; i< 100 ; i++)

{

if(LibraryDB_CD[i][0].compareTo (strComp) == 0)

{

searchPos = i;

System.out.println(LibraryDB_CD[i][0] + " " + LibraryDB_CD[i][1]);
System.out.println("\ndone");

}

}

//if (searchPos == -1)

//{

//System.out.println("\nThe CD was not found");

//}

}

if(choice == 4)

{

System.out.print("\nEnter the movie name: ");

strComp = dataIn.readLine().toLowerCase();

for (int i=0; i< 100 ; i++)

{

if (LibraryDB_Movie[i][0].compareTo (strComp) == 0)

{

searchPos = i;

System.out.println(LibraryDB_Movie[i][0] + " " + LibraryDB_Movie[i][1]);

}

}

if (searchPos == -1)

{

System.out.println("\nThe Movie was not found");

}

}

if(choice == 5)

{

System.out.print("\nEnter the name of the CD to be returned: ");

strComp = dataIn.readLine().toLowerCase();

for (int i=0; i< 100 ; i++)

{

if (LibraryDB_CD[i][0].compareTo (strComp) == 0)

{

searchPos = i;

LibraryDB_CD[i][1] = "Available for renting";

}

}

if (searchPos == -1)

{

System.out.println("\nThe CD was not found");

}

}

if(choice == 6)

{

System.out.print("\nEnter the name of the Movie to be returned: ");

strComp = dataIn.readLine().toLowerCase();

for (int i=0; i< 100 ; i++)

{

if (LibraryDB_Movie[i][0].compareTo (strComp) == 0)

{

searchPos = i;

LibraryDB_Movie[i][1] = "Available for renting";

}

}

if (searchPos == -1)

{

System.out.println("\nThe CD was not found");

}

}

if(choice == 7)

{

System.out.print("\nEnter the name of the CD to be rented: ");

strComp = dataIn.readLine().toLowerCase();

for (int i=0; i< 100 ; i++)

{

if (LibraryDB_CD[i][0].compareTo (strComp) == 0)

{

System.out.print("\nEnter the date it will be back for renting: ");

LibraryDB_CD[i][1] = dataIn.readLine();

searchPos = i;

}

}

if (searchPos == -1)

{

System.out.println("\nThe CD was not found");

}

}

if(choice == 8)

{

System.out.print("\nEnter the name of the Movie to be rented: ");

strComp = dataIn.readLine().toLowerCase();

for (int i=0; i< 100 ; i++)

{

if (LibraryDB_Movie[i][0].compareTo (strComp) == 0)

{

System.out.print("\nEnter the date it will be back for renting: ");

LibraryDB_Movie[i][1] = dataIn.readLine();

searchPos = i;

}

}

if (searchPos == -1)

{

System.out.println("\nThe movie was not found");

}

}

}while (choice != 0);

}

}

Here is the program running and the error:
Library DB Management System:

1: Add a CD to Library DB
2: Add a Movie to Library DB
3: Check Status of a CD
4: Check Status of Movie
5: Return a CD
6: Return a Movie
7: Rent a CD
8: Rent a Movie
0: Exit

Which option would you like to run: 1

Enter the CD name: too

done
Library DB Management System:

1: Add a CD to Library DB
2: Add a Movie to Library DB
3: Check Status of a CD
4: Check Status of Movie
5: Return a CD
6: Return a Movie
7: Rent a CD
8: Rent a Movie
0: Exit

Which option would you like to run: 3

Enter the CD name: too
too Available for renting

done
Exception in thread "main" java.lang.NullPointerException
at librarymanagement.main(librarymanagement3.java:188 )

Any help greatly appreciated

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HELP WITH PROGRAM URGENT