Introduce inputs in exec node

[bakman2]

Your java code does not work, because you don't work with arguments, but with keyboard input from the console.

I am not familiar with java, something like this is what you should be using instead:

	class SalsaHoy{    
		public static void main(String args[]){    
		System.out.println("Welcome "+args[0]);    
		}    
	}