Verified answer

game is not an Integer, it is a String -- if you entered 145, then Integer.parseInt(arg[0]); would work as it is supposed to work

It's because your first argument is "game" and not the string representation of a number.

To see what's in the args[] array, add the following as the first line of main()to the front of main:

System.out.println( "args = " + java.util.Arrays.toString( args ) );

Because your didn't give a number for your first command-line argument? The code as written assumes/requires that the first command-line argument be a valid integer.

So it expects something like:

java your.package.YourClass 44 [other arguments]

And not

java your.package.YourClass game 33 [other arguments]

@M