Peculiarty in code of simple program...

[Kreuz14]

Code:

import java.util.*;
public class SimpleProgram
{
  public static void main(String[] args)
  {
    Scanner input = new Scanner(System.in);
    System.out.println("Enter three integers on one line.");
    int num = input.nextInt();
    num += input.nextInt();
    num += input.nextInt();
    System.out.println("Enter your name on a new line.");
    String name = input.nextLine(); // Program produces logic error if this line does not use the nextLine method (ie. String name;) in conjunction with the next line.
    name = input.nextLine(); // Necessary to avoid an odd logic error, previous nextLine method does not 'appear' to occur during runtime.
    System.out.println(name + " owes Steven $" + num + ".");
  }
}

Why is: name = input.nextLine(); necessary?
I wrote the program but I commented to just make the problem clear in the code.

[Kreuz14]

I'm currently running this on DrJava. I havn't tried it on Eclipse since its such a simple program but should the IDE matter since the compiler is from the JDK right?

Edit: Odd then... this is just a simple prog i need to submit as an assignment lol and I can't believe im spending more than a few minutes on it. Perhaps i'll just send it as is and leave the odd lines of code commented.

EDIT2: Er, I'm not talking to myself. Someone deleted their previous post :P

[CaptainMorgan]

No worries Kreuz... I was mistaken in my previous thought and I was hoping to delete it swiftly.. I didn't think you'd be so quick!

Anyways, your intent shown by this line:

Code:

    System.out.println("Enter three integers on one line.");

indicates you want three integers on one line.. pretty obvious. However, nextInt() keeps reading and doesn't put a '\n' char on the buffer. Review Scanner for more details.

Cheers

[Kreuz14]

ah, thanks! Tough problem to catch, is there an elegant solution to this or is my current code fine if I add a comment to indicate the reason for it?

Also, what exactly is happening to the first nextLine() method call? Does nextInt() just take it as its input?

[CaptainMorgan]

Please see here for your second question, it becomes pretty evident by reading the specs.