Java won't load.

**NewMember** · February 18th, 2013, 01:26 AM

Why won't this work? after being compiled.

public class Add {
 
   public static void main(String[] args) {
      int a = Integer.parseInt(args[0]), b = Integer.parseInt(args[1]);
      System.out.println(a + " + " + b + " = " + (a + b));
   }
 
}

Untitled.jpg

**SunshineInABag** · February 18th, 2013, 02:29 AM

The error means String[] args is empty but you're trying to get values from it. Even if String[] args contained something that could be converted to an integer, you would still receive compiler errors because you cannot initialize variables on the same line using your approach. That is:

public class Add {
   public static void main (String[] args) {
       int a, b, sum;
       int[] myArray = {1, 2};
       a = myArray[0];
       b = myArray[1];
       sum = a + b;
       System.out.println(a + " + " + b + " = " + sum);
     }
}

**Norm** · February 18th, 2013, 07:41 AM

The code should test if the args array has anything in it before trying to use it. Use the array's length attribute.
If args.length is >= 2 then the code can get args[0] and args[1]
If the length is < 2 print out an error message and exit.

**NewMember** · February 18th, 2013, 06:08 PM

Alright thanks for the quick response, it seems to be working.

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