Array out of bounds exception when outputting array to file

Question

Could someone please tell me why i'm getting this array out of bounds exception?
public class Assignment1 {
public static void main(String[] names)throws IOException {
BufferedReader keyboard = null;
String userChoice;
String inputFile = null;
String studentData;
String searchFile = null;
String searchName;
String stringIn;
PrintWriter outputFile;
FileWriter fWriter = null;
BufferedReader fReader = null;
int first;
int last;
int mid;
int midValue;
int i;
int number;
// creates keyboard as a buffered input stream
keyboard = new BufferedReader(new InputStreamReader(System.in));
//prompts user to choose 1 or 2 to make a corresponding choice
System.out.println("Please Enter: ");
System.out.println("1 to Create a File: ");
System.out.println("2 to Search a File: ");
userChoice = keyboard.readLine(); //user enters 1 or 2
// converts a String into an int value
number = Integer.parseInt(userChoice);
fReader = new BufferedReader(new FileReader("studentData.txt"));
if (number == 1) {          
System.out.println("Please Enter the File Name to Create: ");
studentData = keyboard.readLine();
File file = new File("studentData.txt");
fWriter = new FileWriter("studentData.txt");
outputFile = new PrintWriter(fWriter);
names = new String[200];
i=0;
//keep looping till sentinel
while (studentData != "end" && studentData != null &&
i < names.length) {
if (studentData.equals("end")) break; //break and call sort
System.out.println("Enter a name and press Enter. " +
"Type 'end' and press Enter when done: ");
studentData = keyboard.readLine();
//loop for putting the names into the array
for(i=0; i<names.length; i++) ;
outputFile.println(names);
} [b]outputFile.close();

Answer 1

package assignment1;
import java.io.*;
import java.util.*;
public class Assignment1 {
    public static void main(String[] names)throws IOException {
       BufferedReader keyboard = null;
       String userChoice;
       String inputFile = null;
       String studentData;
       String searchFile = null;
       String searchName;
       String stringIn;
       PrintWriter outputFile;
       FileWriter fWriter = null;
       BufferedReader fReader = null;
       int first;
       int last;
       int mid;
       int midValue;
       int i;
       int number;
       // creates keyboard as a buffered input stream
       keyboard = new BufferedReader(new InputStreamReader(System.in));
       //prompts user to choose 1 or 2 to make a corresponding choice
       System.out.println("Please Enter: ");
       System.out.println("1 to Create a File: ");
       System.out.println("2 to Search a File: ");
       userChoice = keyboard.readLine();    //user enters 1 or 2
       // converts a String into an int value
       number = Integer.parseInt(userChoice); 
       fReader = new BufferedReader(new FileReader("studentData.txt"));
       if (number == 1) {          
           System.out.println("Please Enter the File Name to Create: ");
           studentData = keyboard.readLine();
           File file = new File("studentData.txt");
           fWriter = new FileWriter("studentData.txt");
           outputFile = new PrintWriter(fWriter);
           names = new String[200];
           i=0;
            //keep looping till sentinel
            while (studentData.equals("end") && studentData != null &&
                   i < names.length) {
               if (studentData.equals("end")) break;   //break and call sort
               System.out.println("Enter a name and press Enter. " +
                                   "Type 'end' and press Enter when done: ");
                studentData = keyboard.readLine();
                //loop for putting the names into the array
                for(i=0; i<names.length; i++) ;
                outputFile.println(names);
} outputFile.close();
//call selectionSort() to order the array
     selectionSort(names);
     // Now output to a file.
fWriter = new FileWriter("studentData.txt");
outputFile = new PrintWriter(fWriter);
} else if (number == 2) {
System.out.println("Please Enter a File Name to search: ");
searchFile = keyboard.readLine();
inputFile = ("studentData.txt");
} if (searchFile == "studentData.txt") {                      
// Input from a file. See input file streams.
fReader = new BufferedReader(new FileReader("studentData.txt"));
System.out.println("Please enter a Name to search for: ");
searchName = keyboard.readLine();
//enter binary search code
first = 0;
last = 199;
while (first < last)
mid = (first + last)/2; // Compute mid point.
if (searchName.compareTo(names[mid]) < 0) {
last = mid; // repeat search in bottom half.
} else if (searchName.compareTo(names[mid]) > 0) {
first = mid + 1; // Repeat search in top half.
} else {
// Found it.
System.out.println("The Name IS in the file.");
} // did not find it.
System.out.println("The Name IS NOT in the file.");
} else //if userChoice != 1 or 2, re-prompt then start over
System.out.println("Please Enter 1 or 2 or correctly " +
"enter an existing file!!");
// fWriter = new FileWriter("studentdata.txt");
//outputFile = new PrintWriter(fWriter); //output
public static void selectionSort(String[] names) {
//use compareTo!!!!
int smallIndex;
int pass, j = 1, n = names.length;
String temp;
for (pass = 0; pass < n-1; pass++)
//Code for Do/While Loop
do {
//scan the sublist starting at index pass
smallIndex = pass;
//jtraverses sublist names[pass+1] to names[n-1]
for (j = pass+1; j < n; j++)
//if smaller string found, smallIndex=that position
if (names[j].compareTo(names[smallIndex]) < 0)
smallIndex = j;
temp = names[pass]; //swap
names[pass] =names[smallIndex];
names[smallIndex] = temp;
} while (j <= names.length);
//File file = new File("studentData.txt");
This is the output window:
init:
deps-jar:
compile:
run:
Please Enter:
1 to Create a File:
2 to Search a File:
1
Please Enter the File Name to Create:
test
Exception in thread "main" java.lang.NullPointerException
at assignment1.Assignment1.selectionSort(Assignment1.java:134)
at assignment1.Assignment1.main(Assignment1.java:73)
Java Result: 1
BUILD SUCCESSFUL (total time: 9 seconds)