Scanner error message

[plm-pusik]

Hey, I was making a program that uses the scanner class but I got a weird error. I narrowed the code down and I found the source, but I don't know how to fix it. I get the error when I try to run the program, compiling it gives me no error. My code:

import java.util.Scanner;
public class UserInput {
	public static void main(String[] args) {
		Scanner myInput = new Scanner(System.in);
		int myNumber;
		myNumber = myInput.nextInt();
	}
}

Error message:

Exception in thread "main" java.util.NoSuchElementException
	at java.util.Scanner.throwFor(Scanner.java:838)
	at java.util.Scanner.next(Scanner.java:1461)
	at java.util.Scanner.nextInt(Scanner.java:2091)
	at java.util.Scanner.nextInt(Scanner.java:2050)
	at UserInput.main(UserInput.java:6)

Tool completed with exit code 1

I am using TextPad 5.3.1 and this development kit:
Java SE Downloads - Sun Developer Network (SDN)


I'm new to Java so please try to keep the answers well explained.
Thanks for the help.

[Fubarable]

Hey, I was making a program that uses the scanner class but I got a weird error. I narrowed the code down and I found the source, but I don't know how to fix it. I get the error when I try to run the program, compiling it gives me no error. My code:

import java.util.Scanner;
public class UserInput {
	public static void main(String[] args) {
		Scanner myInput = new Scanner(System.in);
		int myNumber;
		myNumber = myInput.nextInt();
	}
}

Error message:

Exception in thread "main" java.util.NoSuchElementException
	at java.util.Scanner.throwFor(Scanner.java:838)
	at java.util.Scanner.next(Scanner.java:1461)
	at java.util.Scanner.nextInt(Scanner.java:2091)
	at java.util.Scanner.nextInt(Scanner.java:2050)
	at UserInput.main(UserInput.java:6)

Tool completed with exit code 1

I get no such error when I compile and run your program.

I'm new to Java so please try to keep the answers well explained.
Thanks for the help.

All the volunteers here strive to give the best answers that they can. If something isn't clear, then just ask.

Best of luck.

[JosAH]

There must've been a non-digit (or not a minus sign) in the input buffer; the OP must've accidentally typed something.

kind regards,

Jos

[plm-pusik]

There must've been a non-digit (or not a minus sign) in the input buffer; the OP must've accidentally typed something.

kind regards,

Jos

OP?

When I try to run the program I don't even get to input anything ... it crashes before that.

[Norm]

What OS are you on?
How are you executing the program? From command prompt or from inside an IDE?

[JosAH]

OP?

It's an acronym: OP == Original Poster.

kind regards,

Jos

[plm-pusik]

What OS are you on?
How are you executing the program? From command prompt or from inside an IDE?

I'm on Windows Vista Home Premium SP 2 (unfortunately).
I'm executing the program from an IDE (TextPad 5.3.1), using java.exe.

Though, I think I fixed it ... it looks like I didn't setup TextPad properly. I tried a few things but it wouldn't work so I changed to Eclipse and it now works fine. I did not reinstall JDK so I'm guessing that wasn't the problem. It would still be nice to know what the error message means though, so that I know what I'm dealing with if I get it in the future. Any ideas?

[Norm]

know what the error message means

Have you looked at the API doc for the method you are using?

Here's a simple program that gets the error:

      String input = "1 3";
      Scanner sc = new Scanner(input);
      while(true) {
        int x = sc.nextInt();
        System.out.println("x=" + x);
      }
/*
x=1
x=3
Exception in thread "main" java.util.NoSuchElementException
	at java.util.Scanner.throwFor(Scanner.java:838)
	at java.util.Scanner.next(Scanner.java:1461)
	at java.util.Scanner.nextInt(Scanner.java:2091)
	at java.util.Scanner.nextInt(Scanner.java:2050)
	at TestCode1.main(TestCode1.java:35)
*/