Exception in thread "main" java.lang.NullPointerException

[nomad]

Hi everyone;
My Class has ended and I was not able to solve this problem in time, and I would still like to solve it.
I got these error code.
Exception in thread "main" java.lang.NullP ointerException
at ticketSales.Tic ketSales.makeEv ent(TicketSales .java:185)
at ticketSales.Tic ketInput.main(T icketInput.java :56)

Anyway I have several Class

This one is called TransAction

public  class TransAction {
	   private TicketSales makeEvent;
	   private BuyerClass makeBuyer;
	   public TransAction(TicketSales ticket, BuyerClass buyer) {
	      this.makeEvent= ticket;
	      this.makeBuyer= buyer;
	   }
	   public TicketSales getTicket() { return makeEvent; }
	   public BuyerClass getBuyer() { return makeBuyer; }
}

This is part of my TicketSales Class This is the main section which has all the data types . which has error code
Line 185 is this:
System.out.prin t("Enter Event ID Number (CL123, DL123, PL123) ==>");
id = kbd.next();

public class TicketSales {

	static Scanner kbd;

	public static EventClass makeEvent() {
		EventClass ticket = null;

		// prompt for data
		String id;
		String en;
		String ed;
		String vt;
		String sl;
		double pr;

		System.out.print("Enter Event ID Number (CL123, DL123, PL123) ==>");
		id = kbd.next();

		System.out.print("Enter Event Name (Concert, Dinner, Play) ==>");
		en = kbd.next();

		System.out.print("Enter Event Date (05/12/2007) ==>");
		ed = kbd.next();

		System.out.print("Enter Event Time (4:00pm==>");
		vt = kbd.next();

		System.out.print("Enter Seatlayout (3500, 2000, 1500,==>");
		sl = kbd.next();

		System.out.print("Enter Price (100.00)==>");
		pr = kbd.nextDouble();

		// make an object
		ticket = new EventClass(id, en, ed, vt, sl, pr);

		return ticket;
	}

}// close TicketSales

This is my TicketInput
This has error code which is at
EventClass ticket = TicketSales.mak eEvent();

class TicketInput {

	public static void main(String args[]) {

		// make array list object

		ArrayList<EventClass> arlist = new ArrayList<EventClass>();
		arlist.add(new EventClass("CL123", "Concert", "05/12/2007", "12:00pm", "3500 Seats", 55.00));
		arlist.add(new EventClass("PL123", "Play", "06/14/2007", "2:00pm", "2000 Seats", 75.00));
		arlist.add(new EventClass("DL123", "Dinner", "05/29/2007", "7:00pm","1500 Seats", 100.00));
		//arlist.addAll((Collection<? extends EventClass>) new EventClass("DL123", "Dinner", "05/29/2007", "7:00pm", 200.00, "Dan Smith", "1234 East ST Fullerton, CA 90000", "Row 1 Seat 14, 15"));
	//arlist.addAll((Collection<? extends EventClass>) new EventClass("PL123", "Play", "06/14/2007", "2:00pm", 150.00, "Jon Doe", "1234 East ST", "Row 12 Seat 18, 19"));
		System.out.println(arlist);


		// make a scanner
		Scanner kbd = new Scanner(System.in);

		int choice;
		System.out.println("Make a Section: ");
		System.out.println("1. Enter Event ");
		System.out.println("2. Enter Buyer Info ");
		System.out.println("3. Print Event ");
		System.out.println("4. Print Buyer Inof ");
		System.out.println("5. Exit this Program ");
		System.out.print("\nPlease press Enter afer each response");
		System.out.println("\nEnter your choose please: ");
		choice = kbd.nextInt();
		kbd.nextLine();
		if (choice == 1) { // if 1 is select go to makeEvent

			boolean endData = false;

			while (!endData) {
				EventClass ticket = TicketSales.makeEvent();
				arlist.add(ticket);
				System.out.println("Add More Events (Y/N)-->");

				String ans = kbd.next();

				if (ans.equalsIgnoreCase("N")) {
					System.out.println(ticket);
					endData = true;
				}
			}// close while loop
		}// close choice 1
....

Any help would be great. Each Class is it open file.

nomad

[JosAH]

I just quickly browsed through your code but have you instantiated your 'kbd'
scanner? I couldn't find it (but I may be wrong of course).

kind regards,

Jos

[nomad]

I just quickly browsed through your code but have you instantiated your 'kbd'
scanner? I couldn't find it (but I may be wrong of course).

kind regards,

Jos

That was it Jos....
Thanks. I looked at this for about 45 mins. Looked at the arraylist and pointers.
Darn...
I wish I could turn it in some how.
He has the assignments uploading locked.

nomad

[nomad]

I just quickly browsed through your code but have you instantiated your 'kbd'
scanner? I couldn't find it (but I may be wrong of course).

kind regards,

Jos

Don't know if I should be PMs you.
need help with this part for the article.

for( int i=0; i<arlist.size(); i++) {
PersonClass e = arlist.get( i );
System.out.println(“The info  is “+e.getEmpID(), +e.getLname() );
}

Can not get e.getLname() to print.
here is the top section of class

class PersonClass {
    private String empid;
    private String name;
    public PersonClass(String id) {
		empid = id;
    }

    public PersonClass(String id, String name) {
        this.empid = id;
        this.name = name;
    }

    public String getID() {return empid;}
    public String getName() {return name;}

    public String toString() {
        return "(" + empid + ", " + name + ")";
    }

thanks
nomad

[JosAH]

Maybe it's just me again but I don't see a getLname() method in your Person class.

kind regards,

Jos

[nomad]

Maybe it's just me again but I don't see a getLname() method in your Person class.

kind regards,

Jos

Got rid of the L in getName() in the method. but it still does not work. I get an error on
The operator + is undefined for the argument type(s) String

thanks
nomad

[JosAH]

Got rid of the L in getName() in the method. but it still does not work. I get an error on
The operator + is undefined for the argument type(s) String

thanks
nomad

Can't be; the '+' operator is overloaded for at least one String operand. What
is the exact error diagnostic message and the relevant code?

kind regards,

Jos

[nomad]

Can't be; the '+' operator is overloaded for at least one String operand. What
is the exact error diagnostic message and the relevant code?

kind regards,

Jos

Jos
this is the only error I get.
The operator + is undefined for the argument type(s) String

Ps Im using eclipe...
+e.getName() ); is underline with red.
it has to be comma after
System.out.prin tln("The info is "+e.getID() ,
if I get rid of the comma it works.

nomad
or I could just do this
System.out.prin tln("Event info is " + e);

But still would like to know what there is an error.
nomad

[JosAH]

Jos
this is the only error I get.
The operator + is undefined for the argument type(s) String

Ps Im using eclipe...
+e.getName() ); is underline with red.
it has to be comma after
System.out.prin tln("The info is "+e.getID() ,
if I get rid of the comma it works.

nomad
or I could just do this
System.out.prin tln("Event info is " + e);

But still would like to know what there is an error.
nomad

Can you show exactly what you're trying to do? And what's that comma doing there?

kind regards,

Jos

[nomad]

Can you show exactly what you're trying to do? And what's that comma doing there?

kind regards,

Jos

would like to print id number and name.
Comma is just a seperator between id number and name
ie
ds, James R Dean.

I need to do it this way instead
System.out.prin tln(" Id is " + e.getID());
System.out.prin tln("Name is " + e.getName());

Thanks.
nomad

[JosAH]

would like to print id number and name.
Comma is just a seperator between id number and name
ie
ds, James R Dean.

I need to do it this way instead
System.out.prin tln(" Id is " + e.getID());
System.out.prin tln("Name is " + e.getName());

Thanks.
nomad

Just print the comma in between; it's just text:[code=java]
System.out.prin tln(e.getID()+" , "+e.getName ());[/code]
kind regards,

Jos

[nomad]

Just print the comma in between; it's just text:[code=java]
System.out.prin tln(e.getID()+" , "+e.getName ());[/code]
kind regards,

Jos

I tried that but I forgot to add the + sign before ","
darn

nomad
Thanks a million

[JosAH]

You're welcome. Problem solved now?

kind regards,

Jos