BlackJack java random.nextInt

Question

public class BlackJack {
    public static void main(String args[]) {
        String input;
        char reDo;
        Scanner keyboard = new Scanner (System.in);
        Random random = new Random();
        int card1 = random.nextInt(10) + 1;
        int card2 = random.nextInt(10) + 1;
        int card = random.nextInt(10) + 1;
        int total1 = card1 + card2;
        int total2 = total1 + card;

        System.out.print("First cards: " + card1 + ", " + card2 + "\n");
        System.out.print("Total: " + total1 + "\n");

        boolean loop = true;
        while (loop) {
            System.out.print("Do you want another card? (y/n): ");
            input = keyboard.nextLine();
            reDo = input.charAt(0);
            if (reDo == 'y' || reDo == 'Y') {
                System.out.print("Card: " + card + "\n");
                System.out.print("Total: " + total2 + "\n");
            } else if (reDo == 'n' || reDo == 'N') {
                loop = false;
            }
        }
    }
}

The output is as follows:

First cards: 8, 3
Total: 11
Do you want another card? (y/n): y
Card: 7
Total: 18
Do you want another card? (y/n): y
Card: 7
Total: 18
Do you want another card? (y/n): n

I want to be able to generate a new random card within the loop, display the recurring total, and stop the program. The issue I can't understand is how to use the random.nextInt tool and be able to reuse it more accessibly. Currently its stuck as card1, card2, card, total1, and total2. If I could make them so that I could access them more easily the program would be easier I think to write. The issue is that I can't understand how to repeat the random.nextInt within the while loop.

Answer 1

First put all the cards in a deck.

Then generate a random number between 0 and the number of cards in the deck.

If deck is an ArrayList (for example), you could do

import java.util.*;


public class Main
{

    public static void main(String[] args)
    {
        List<Card> deck = new ArrayList<Card>();
        deck.add(new Card(1));
        deck.add(new Card(3));
        deck.add(new Card(7));
        deck.add(new Card(10));

        Random randomGenerator = new Random(); 

        System.out.println("Deck 1 tests");
        // draw 3 cards:
        for (int i = 0; i < 3; i++)
        {
            int randomCard = randomGenerator.nextInt(deck.size());
            Card card = deck.remove(randomCard);
            System.out.println("Removed a(n) "+card);
        }

        // you could also do
        List<Card> deck2 = new ArrayList<Card>();
        deck2.add(new Card(1));
        deck2.add(new Card(7));
        deck2.add(new Card(3));
        deck2.add(new Card(10));

        Collections.shuffle(deck2);
        System.out.println("Deck 2 tests");
        // draw 3 cards:
        for (int i = 0; i < 3; i++)
        {
            Card card = deck2.remove(0);
            System.out.println("Removed a(n) "+card);
        }


    }

}

class Card {
    public Card(int i)
    {
        blackJackValue = i;
    }

    public int blackJackValue;

    public String toString() {
        return String.valueOf(blackJackValue);
    }
}