public class NewCase
{
    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.");
            case 1 -> System.out.println("You entered a one.");
            case 2 -> System.out.println("You entered a two.");
            default -> System.out.println("Having a default is optional");
        }
    }
}