java netbeans commadline argument passing

Question

I am passing a command line argument using Netbeans but I get an ArrayIndexOutOfBoundsException.

My code is:

public class CmdLineArgumentPassing

{

      public static void main(String args[])
      {        
         System.out.println("Count : " + args.length);

         System.out.println("i : "+args[0]);
      }
} 

The output is:

Count : 0

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0

Answer 1

As your output is Count : 0 then the args array has a length of 0 which means no arguments are being passed.

When you try to access the first argument using arg[0] you get an Exception as you are trying to get a member of the array which does not exist. In this case you're trying to get the first member of an empty array. Remember array indexes start at 0 and go to length - 1.

As args is empty it means the problem is with Netbeans passing your arguments not with your code, so my guess is that Netbeans is not configured properly.

Answer 2

Right mouse click on the project, select Properties, go to the Run page, add the command line arguments.

Answer 3

Click on Final proj and run and not the main project for netbeans 6.9. U will get the answer.