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# How do I get a card value in a two player black jack game?

Posted on 2011-09-09
249 Views
I need help  writing a public int getCardValue(Card c). I have to use getRank() from class card. If rank is Jack, Queen, King return 10, if Ace return 1. I also need to convert the Strings two-ten to a integer value.

Card class:

public class Card
{

private String rank;//card rank: a number between 2 and 10, or Jack, Queen, King or Ace
private char suit;//card suit: S,C,H,or D
private static String[] Ranks={"2","3","4","5","6","7","8","9","10","Jack","Queen","King","Ace"};
private static char[] Suites={'C','H','D','S'};

/**
* Constructor for objects of class Card
*/
public Card()
{
rank="2";
suit='H';

}

public Card(String rank, char suit)
{
this.rank=rank;
this.suit=suit;
}
public String getRank()
{
return rank;
}

public char getSuit()
{
return suit;
}

public void setRank(String rank)
{
this.rank=rank;
}

public void setSuit(char suit)
{
this.suit=suit;
}
//Returns an array of possible card ranks
public static String[] getPossibleRanks()
{
return Ranks;
}
//Returns an array of possible card suits
public static char[] getPossibleSuits()
{
return Suites;
}

public String toString()
{String suitName = "";
switch (suit){
case 'H':
suitName = rank + " of Hearts";
break;
case 'S':
suitName = rank + " of Spades";
break;
case 'D':
suitName = rank + " of Diamonds";
break;
case 'C':
suitName = rank + " of Clubs";

}
return suitName;
}
}

DeckOfCards class:

import java.util.Random;
import java.util.ArrayList;
public class DeckOfCards
{
// instance variables - replace the example below with your own
private ArrayList<Card> deck;
Random getRandom = new Random();
/**
* Constructor for objects of class DeckOfCards
*/
public DeckOfCards()
{
deck = new ArrayList<Card>();
resetDeckOfCards();
}

public void resetDeckOfCards()
{
String[] ranks = Card.getPossibleRanks();
char[] suites = Card.getPossibleSuits();

for (int i = 0; i < getPossibleRanks().length ; i++)
{
for (int j = 0; j < getPossibleSuits().length; j++)
{
}
}
}

public Card getCard()//remove random card of arraylist of cards and return value from method
{
if (deck.isEmpty())
resetDeckOfCards();
return deck.remove(getRandom.nextInt(deck.size()));
}

public ArrayList<Card> getHand(int size)
{
ArrayList<Card> hand = new ArrayList<Card>();
for (int i = 0; i < size(); i++)
{
}
return hand;
}

}

TwoPlayerBlackJack so far:

public class TwoPlayerBlackJack
{
// instance variables - replace the example below with your own
private String rank;

/**
* Constructor for objects of class TwoPlayerBlackJack
*/
public TwoPlayerBlackJack()
{
TwoPlayerBlackJack game=new TwoPlayerBlackJack();
}

/**
* An example of a method - replace this comment with your own
*
* @param  y   a sample parameter for a method
* @return     the sum of x and y
*/
public int getCardValue(Card c)
{
String card = Card.getRank();
if(suit.Card.getRank()="Jack,Queen,King")
{
return 10;
if(rank.Card.getRank()="Ace")
{
return 1;
}
}
int i= Integer.parseInt("two", "three", "four", "five", "six", "seven", "eight", "nine", "ten");
System.out.println("i ": + i);
return i;
}

}

0
Question by:ryanbecker24
• 9
• 4

LVL 47

Expert Comment

`````` private static int[] values={2,3,4,5,6,7,8,9,10,10,10,10,11};

HashMap<String, Integer> rankValues = new rankValues<String,Integer>();

for(int i=0; i<ranks.length; i++){
rankValues.put(Ranks[i],values[i]);

}

and then int vlaue = rankVlaues.get(rank);
``````
0

LVL 47

Expert Comment

I made Ace 11, but you can easily change it to 1
0

LVL 47

Expert Comment

you can of couse make a longer method like:

if(rank.equals("2")) return 2;
else if rank.equals("3")) return 3;
else if ...

and so on

just a little bit of typing but strightforawrd andthere is also a value in tha either
0

Author Comment

What part are you talking about? And what is that for? I also want help on the TwoPlayerBlackJackGame
0

LVL 47

Expert Comment

Well, let's do things stepwise

with HashMap

you add the theird array right next to Rank and Sutites arrays

then you can declare static HashMap in class Card
and in constructor you camn populate HashMap

and then in your method getVlaue()

you'll use this Hashmap
0

Author Comment

Whats the loop for? Also, is there anyway I could use getRank() from the Card class to write this method?
0

LVL 47

Expert Comment

I guess this way it should work (only Card class is modifyed):

(of cousre in the getCardVlaue() method
you can use getRank() isnated of simpley rank
but does not make much semnse

``````import java.util.HashMap;

public class Card
{

private String rank;//card rank: a number between 2 and 10, or Jack, Queen, King or Ace
private char suit;//card suit: S,C,H,or D
private static String[] Ranks={"2","3","4","5","6","7","8","9","10","Jack","Queen","King","Ace"};
private static char[] Suites={'C','H','D','S'};
private static int[] values={2,3,4,5,6,7,8,9,10,10,10,10,11};
private static HashMap<String, Integer> rankValues;

static  {
for(int i=0; i<Ranks.length; i++){
rankValues.put(Ranks[i],values[i]);

}

}
/**
* Constructor for objects of class Card
*/
public Card()
{
rank="2";
suit='H';

}

public Card(String rank, char suit)
{
this.rank=rank;
this.suit=suit;

}
public String getRank()
{
return rank;
}

public char getSuit()
{
return suit;
}

public void setRank(String rank)
{
this.rank=rank;
}

public void setSuit(char suit)
{
this.suit=suit;
}
//Returns an array of possible card ranks
public static String[] getPossibleRanks()
{
return Ranks;
}
//Returns an array of possible card suits
public static char[] getPossibleSuits()
{
return Suites;
}

public int getCardValue(){
return rankValues.get(rank);
}

public String toString()
{String suitName = "";
switch (suit){
case 'H':
suitName = rank + " of Hearts";
break;
case 'S':
suitName = rank + " of Spades";
break;
case 'D':
suitName = rank + " of Diamonds";
break;
case 'C':
suitName = rank + " of Clubs";

}
return suitName;
}
}
``````
0

Author Comment

The problem is that I need to use the method getRank() from Class Card and I need to use a method to convert two-ten to integer values as 2,3,4,5,6,7,8,9,10.
0

LVL 47

Accepted Solution

for_yan earned 500 total points

Ok, there you go:
``````public int getCardValue(Card c){
String rank = c.getRank();

int value = -1;
try {
value = new Integer(rank);
}catch(Exception ex){
if(rank.equals("Ace"))value = 1;
else value = 10;

}
return value;
}
``````

}
0

Author Comment

method such as Integer(String s)
0

LVL 47

Expert Comment

look at the code above - it uses costructor Integer(String)
0

LVL 47

Expert Comment

equivalent method is Integer.parseInt(String)  - this will also work in place of new Integer(String)
0

LVL 47

Expert Comment

this of course cannot make sense:
int i= Integer.parseInt("two", "three", "four", "five", "six", "seven", "eight", "nine", "ten");

one thing is that

int i = Integer.parseInt("2"); will work

but

int i = Integer.parseInt("two"); will not - luckily you don';t need to do anything like that

besides Integer.parseInt("...") takes one String as an argument not multiple strings

0

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