ArrayIndexOutOfBoundsException: 0

**mxsar** · 11-16-2010, 08:14 PM

Hello all!
I have started taking classes in Java some weeks ago and I have come across my first problem... I'm getting this error when I run the programme although during the compiling I have no errors. I'm posting the code and the error so maybe someone can help :confused:
Thank you in advance for your time!

import java.io.*;
class AthroismaApp
{ public static void main(String args[]) throws IOException
{ int a, b;
a=Integer.parseInt(args[0]);
b=Integer.parseInt(args[1]);
System.out.println();
System.out.print("To athroisma ton "+a+" kai "+b);
System.out.println(" einai iso me "+(a+b));
}
}

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at AthroismaApp.main(AthroismaApp.java:5)

**m00nchile** · 11-16-2010, 08:17 PM

Do you know what the args array is? How do you start your application? One hint, the args array holds the arguments when you call your program, eg:

Java Code:

java MyApp 1 2 3 4

in the above example, args[0] is 1, args[1] is 2... etc.
Also another tip, whenever you're doing something with command line arguments, check the length of the args array, to see if it conforms to your demands before you use it in your code.