NullPointerException I NEED HELP
Could someone pleaaaase help with figure out why i get a null pointer exception. I can not figure it out. PLLEAASEE HELLPP. I have attached the code and highlighted the areas that give me the nullpointerexception. I dont know what is wrong. I NEED HELP FAST. Thanks so much. I get the nullpointed exception everything i run a method from the interface.
import java.io.*;
import java.util.*;
public class collectEmployeeInfo
{
private int counter;
private Employee[] employees = new Employee[10];
private final int DEFAULT_CAPACITY = 10;
private final int NOT_FOUND = 1;
private Scanner sc = new Scanner(System.in);
GregorianCalendar gc;
int month, day, year;
String name;
public int find;
public void readFile(){
FileInputStream read;
DataInputStream in;
BufferedReader br;
String name;
int ID;
int month;
int day;
int year;
GregorianCalendar cal;
try{
read = new FileInputStream("H://employeefile.dat");
in = new DataInputStream(read);
br = new BufferedReader(new InputStreamReader(in));
String fileRead;
while((fileRead = br.readLine()) !=null){
Scanner scan = new Scanner(br.readLine());
name = scan.next();
ID = scan.nextInt();
month = scan.nextInt();
day = scan.nextInt();
year = scan.nextInt();
cal = new GregorianCalendar(month,day,year);
Employee radford = new Employee(name, ID, cal);
employees[counter] = radford;
counter++;
//scan = new Scanner(br.readLine());
System.out.println(read.toString());
}
in.close();
}
catch (IOException e){
System.out.println("File Not Found");
}
}
public String searchEmp(int find){
int search = NOT_FOUND;
try{
if(isEmpty())
throw new EmptyStackException();
for(int i = 0; i < counter && search == NOT_FOUND; i++){
if(employees[i].getID() == find){
search = i;
System.out.println(employees[search]);
}
System.out.println("Employee not found");
}
}
catch (EmptyStackException a){
System.out.println("Empty");
}
try{
if(search == NOT_FOUND)
throw new NoSuchElementException();
}
catch(NoSuchElementException a){
System.out.println("Not Found");
}
return employees[search].toString();
}
public int size(){
return counter;
}
public boolean isEmpty(){
return(counter==0);
}
public boolean contains(Employee avail){
int search = NOT_FOUND;
for(int i = 0; i < counter && search == NOT_FOUND; i++)
if(employees[i].equals(avail))
search = i;
return (search != NOT_FOUND);
}
public void add(String name, int find, GregorianCalendar calendar)
{
employees[counter] = new Employee(name, find, calendar);
counter++;
}
/**if(!(contains(newEmployee))){
if(size() == employees.length)
expandCapacity();
employees[counter] = newEmployee;
counter++;
}
}*/
public void expandCapacity(){
Employee[] bigger = new Employee[employees.length*2];
for(int i = 0; i < employees.length; i++)
bigger[i] = employees[i];
employees = bigger;
}
public Employee remove(int find) throws EmptyStackException,
NoSuchElementException
{
int search = NOT_FOUND;
if(isEmpty())
throw new EmptyStackException();
for( int i = 0; i < counter && search == NOT_FOUND; i++)
{
if(employees[i].getID() == find)
{
search = i;
System.out.println("The employee has been deleted!");
}
}
if(search == NOT_FOUND)
throw new NoSuchElementException();
Employee result = employees[search];
employees[search] = employees[counter-1];
employees[counter-1] = null;
counter--;
return result;
}
public String listEmployees(){
String list = "";
for(int i = 0; counter > i; i++){
if(employees[i] !=null){
list = list + employees[i].toString() + "\n";
}
}
return list;
}
public collectEmployeeInfo(){
GregorianCalendar calendar;
int month;
int day;
int year;
int find;
String name;
employees = new Employee[10];
counter = 0;
try{
Scanner radford = new Scanner(new File("h://employeefile.dat"));
while(radford.hasNextLine());
{
if(counter == employees.length)
expandCapacity();
name = radford.next() + radford.next() + radford.next();
find = radford.nextInt();
month = radford.nextInt();
day = radford.nextInt();
year = radford.nextInt();
calendar = new GregorianCalendar(month, day, year);
employees[counter] = new Employee(name, find, calendar);
counter++;
}
radford.close();
}
catch (IOException a){
System.out.println("Not Found");
}
}
public void exitProgram(){
try{
String ex = "";
BufferedWriter bw = new BufferedWriter(new FileWriter(new File("H://employeefile.dat")));
for( int i = 0; i < counter; i++){
bw.write(ex + employees[i]);
bw.newLine();
}
bw.close();
}
catch (IOException e){
System.err.println(e);
}
System.out.println("Thank You");
System.exit(0);
}
public String toString(){
String result = "";
for(int i = 0; i < counter; i++)
result = result + employees[i].toString() + "\n";
return result;
}
}
import java.util.*;
import java.io.*;
public class Interface{
private Scanner sc = new Scanner(System.in);
private int option;
private String name;
private String first;
private String last;
private int month;
private int day;
private int year;
//collectEmployeeInfo bacon = new collectEmployeeInfo();
private boolean stop = false;
GregorianCalendar calendar;
//Employee radford = new Employee("", 0, calendar);
private int find;
private collectEmployeeInfo employees;
public void begin(){
System.out.println("This is the Employee Program: " + "\n");
System.out.println("Press 1 to search for an employee");
System.out.println("Press 2 to add an employee");
System.out.println("Press 3 to delete an employee");
System.out.println("Press 4 to list all employees");
System.out.println("Press 5 to exit the program" + "\n");
option = sc.nextInt();
if(option == 1){
this.beginSearch();
}
else if(option == 2){
this.addEmp();
}
else if(option == 3){
this.deleteEmp();
}
else if(option == 4){
this.listEmps();
}
else if(option == 5){
this.exitSys();
}
else{
System.out.println("Invalid Option");
}
}
public void start(){
employees = new collectEmployeeInfo();
this.begin();
}
public void beginSearch() {
//int someNumber = 0;
System.out.println("Enter employeeID: ");
find = sc.nextInt();
employees.searchEmp(find); System.out.println(find);
this.begin();
}
public void addEmp(){
System.out.println("Enter employees first name: ");
String first = sc.next();
System.out.println("Enter employees last name: ");
String last = sc.next();
name = first + last;
System.out.println("Enter new employee ID: ");
find = sc.nextInt();
System.out.println("Enter employees hire date: ");
month = sc.nextInt();
day = sc.nextInt();
year = sc.nextInt();
calendar = new GregorianCalendar(month, day, year);
employees.add(name, find, calendar);
this.begin();
}
public void deleteEmp(){
Scanner delete = new Scanner(System.in);
System.out.println("Enter a employee to delete: ");
find = sc.nextInt();
employees.remove(find);
this.begin();
}
public void listEmps(){
Scanner list = new Scanner(System.in);
employees.listEmployees(); System.out.println();
this.begin();
}
public void exitSys(){
employees.exitProgram(); System.exit(0);
}
}
