Confused

Hi, I have just started learning Java and I have a question.

Using Eclipse, I am trying to run this:

Code:

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public class AddNumbers{
  public static void main(String[] args) {
    System.out.println("Addition of two numbers!");
    int a = Integer.parseInt(args[0]);
    int b = Integer.parseInt(args[1]);
    int sum = a + b;
    System.out.println("Sum: " + sum);
  }
}

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But when I run it, I get the error:

Code:

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Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
        at AddNumbers.main(AddNumbers.java:4)

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I am confused as to why this is happening, can anyone help?

I know it's probably going to be some stupidly obvious thing that i'm forgetting, but i'm just a noob! :P

Thanks!

You have to run this code with two command line parameters. But seems to me, you don't have use any.

use args.length to check had user input any thing

When you run the program, you have to include two arguments (the numbers you want to add). For example, if you want to add 3 & 4, you would specify:

Code:

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java AddNumbers 3 4

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Luck,
CJSL