public class Case
{
    public static void main(String[] args)
    {
        int n = Integer.parseInt(args[0]);
        switch(n)  //you can switch on integral types
                   //any of the four integer types
                   //strings
                   //chars
                   //enums (later)
        {
            case 0:
                System.out.println("You entered a zero.");
                //break;
            case 1:
                System.out.println("You entered a one.");
                //break;
            case 2:
                System.out.println("You entered a two.");
               // break;
            default:
                System.out.println("Having a default is optional");
        }
    }
}