CODEWITHSUNDEEP
javaprinting
Gustave Jungels
Gustave Jungels

Reputation: 57

A simple Blackjack Game

I am building a Blackjack game using Object Oriented Programming.

I wrote this so far:

import java.util.Random;

public class Blackjack {
    public static String[] Card = new String[12];
    public static String[] Suits = {"D", "H", "S", "C"};


    public void setCard(String[] c) {
        Card = c;
        Card[0] = "A";
        Card[1] = "2";
        Card[2] = "3";
        Card[3] = "4";
        Card[4] = "5";
        Card[5] = "6";
        Card[6] = "7";
        Card[7] = "8";
        Card[8] = "9";
        Card[9] = "10";
        Card[10] = "J";
        Card[11] = "Q";
        Card[12] = "K";
    }

    public static void main(String[] args) {
        System.out.println("Welcome to Blackjack.");

        Random rand = new Random();

        int card_Sign1 = (int) (Math.random() * 13);
        int card_Sign2 = (int) (Math.random() * 13);

        int Suit1 = (int) (Math.random() * 4);
        int Suit2 = (int) (Math.random() * 4);

        System.out.print(Card[card_Sign1]);

    }
}

The output I get is Welcome to Blackjack then null. I was wondering if I could get a little help on how to solve this.

Upvotes: 0

Views: 2310

Answers (2)

Fuerback
Fuerback

Reputation: 19

You forgot the call to setCard() and you don't need to pass parameters to setCard(). Try this:

public static void main(String [] args) {

System.out.println("Welcome to Blackjack.");

Random rand = new Random();

int card_Sign1 = (int)(Math.random()*13);
int card_Sign2 = (int)(Math.random()*13);

int Suit1 = (int)(Math.random()*4);
int Suit2 = (int)(Math.random()*4);

setCard();

System.out.print(Card[card_Sign1]); 

} 

public void setCard() {
    Card[0] = "A";
    Card[1] = "2";
    Card[2] = "3";
    Card[3] = "4";
    Card[4] = "5";
    Card[5] = "6";
    Card[6] = "7";
    Card[7] = "8";
    Card[8] = "9";
    Card[9] = "10";
    Card[10] = "J";
    Card[11] = "Q";
    Card[12] = "K";
}

Upvotes: 1

FlexEast
FlexEast

Reputation: 317

As csmckelvey said in a comment, you need to call the setCard method inside your main method. Otherwise, the card array never gets its initial values.

You have another problem as well--You declare your array with a size of 12:

public static String[] Card = new String [12];

But then you try to assign it 13 values in setCard. You'll need to change it to have a size of 13.

Also, setCard() doesn't need a paramater, you're fine just setting the values for Card.

Aside from that, looking good, keep it up!

Upvotes: 2

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