CODEWITHSUNDEEP
javastringtype-conversioninteger
snakezz
snakezz

Reputation: 73

Convert String made out of numbers and words of ArrayList to int java

I am a Java beginner and trying to get a console blackjack to run. I created an ArrayList with cards as Strings, such as "3 Spades". Now I need to check for the values so that I dont get more than 21 for example. I have tried giving all of the Strings ints but it that isnt working for me. Is there a way to filter only the numbers out of the String and save as an int? Thanks for your help.

public ArrayList<String> Karten () {
    ArrayList<String>Herz = new ArrayList<String>(
            Arrays.asList(" 2 Herz "," 3 Herz "," 4 Herz "," 5 Herz "," 6 Herz "," 7 Herz "," 8 Herz "," 9 Herz "," 10 Herz ", " Bube Herz ", " Dame Herz ", " König Herz ", " Ass Herz "));

Upvotes: 1

Views: 162

Answers (2)

Conffusion
Conffusion

Reputation: 4475

You can also create a new type Card which has a numeric value field:

public class Card {
    private int value;
    private String valueLabel;
    private String shape;
    public Card(int value, String valueLabel, String shape) {
        this.value=value;
        this.valueLabel=valueLabel;
        this.shape=shape;
    }
    public int getValue() {
        return value;
    }

    public String toString() {
        return valueLabel+" "+shape;
    }
}

This also solves your problem for " Bube Herz ", " Dame Herz ", " König Herz ", " Ass Herz " which don't have a number.

Now you can build your hand as a list of Card instances:

ArrayList<Card> cards=new ArrayList<>(Arrays.<Card>asList(new Card(1,"Ass","Herz"), new Card(2,"2","Herz")));
int totalValue=cards.stream().mapToInt(c->c.getValue()).sum();
System.out.println("Your hand:"+cards);
System.out.println("has a total value of:"+totalValue);

Output:

Your hand:[Ass Herz, 2 Herz]
has a total value of:3

Upvotes: 2

lime
lime

Reputation: 809

When you get a card, try the following:

String card = "3 Spades"
String[] cardSplit = str.split(" ");
int cardValue = Integer.parseInt(cardSplit[0]);
String cardType = cardSplit[1];

You can now use cardValue as an integer and add it to a total. You can also reference cardType if you need the type of card, but assuming this is Black Jack I don't think it matters much.

Let me know if this helps.

Upvotes: 2

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