import java.util.*;

public class HelloWorld
{
    public static void main(final String...args)
    {
        Scanner scanner = new Scanner(System.in);
        System.out.println("What was your name again? ");
        String name = scanner.next();
        System.out.println("Hey Ray, can you give me a random number > 0? ");

        int randomNum = 0;

        Random random = new Random();
        int tries = 0;
        while(randomNum <= 0)
        {
            String number = scanner.next();
            try
            {
                randomNum = Integer.parseInt(number);
                if(randomNum <= 0)
                {
                    throw new NumberFormatException("I wanted a number > 0...");
                }
            }
            catch (NumberFormatException e)
            {
                tries++;
                System.out.println("That was not a number, please try again... ");

                if(tries >= 10)
                {
                    randomNum = random.nextInt(10);
                    System.out.println("Okay since you don't know what a number is, let's continue with:  " + randomNum);
                }
            }
        }

        Date date = new Date();   // given date
        Calendar calendar = GregorianCalendar.getInstance(); // creates a new calendar instance
        calendar.setTime(date);   // assigns calendar to given date
        int hour = calendar.get(Calendar.HOUR_OF_DAY);

        System.out.println("It's around: " + hour + " o'clock");

        int betterRandomNumer = hour * randomNum * random.nextInt(10);

        System.out.println("Our special number turned out to be: " + betterRandomNumer);

        if(betterRandomNumer > 100)
        {
            System.out.println("This is just too big, we will cut it down");
            randomNum = randomNum/(randomNum * random.nextInt(10));
            System.out.println("Our new special number turned out to be: " + betterRandomNumer + " way better!");
        }

        for(int i = 0; i < betterRandomNumer; i++)
        {
            switch(lastDigit(i))
            {
                case 1:
                    System.out.println("Hello World");
                    break;
                case 2:
                    System.out.println("Hallo Welt");
                    break;
                case 3:
                    System.out.println("Oi Mundo");
                    break;
                case 4:
                    System.out.println("Olá Mundo");
                    break;
                case 5:
                    System.out.println("Salute Monde");
                    break;
                default:
                    System.out.println("Oh no, I'm out of languages, this will be ugly!");

            }
        }

    }

    public static int lastDigit(int number) { return number % 10; }
}


Output:

What was your name again?
Ray
Hey Ray, can you give me a random number > 0?
Hi
That was not a number, please try again...
Oh sorry
That was not a number, please try again...
That was not a number, please try again...
110
It's around: 14 o'clock
Our special number turned out to be: 9240
This is just too big, we will cut it down
Our new special number turned out to be: 16 way better!
Oh no, I'm out of languages, this will be ugly!
Hello World
Hallo Welt
Oi Mundo
Olá Mundo
Salute Monde
Oh no, I'm out of languages, this will be ugly!
Oh no, I'm out of languages, this will be ugly!
Oh no, I'm out of languages, this will be ugly!
Oh no, I'm out of languages, this will be ugly!
Oh no, I'm out of languages, this will be ugly!
Hello World
Hallo Welt
Oi Mundo
Olá Mundo
Salute Monde