Question

UPDATED CODE

I’m trying to figure out a way to count how often one value appears in an ArrayList.

System.out.println("Hand 1, Number of Clubs: " 
              + hands[0].frequency(hands[0], Card.Suit.CLUBS));

So in the above case i want to count how many “Clubs” are in hands[0].

public int frequency(Hand c, Suit suit){
    int count = 0;
    if(suit == suit) //need this to be "If suit (club) is present, count++)
            {
             count++;
            }    
    return count;
}

I’m drawing a blank…. If i change the method type to ArrayList then i cannot return “count”

hands[0] is created by:

    Hand[] hands = new Hand[4];
    for(int i=0; i<hands.length; i++) {
       hands[i]=new Hand();
       }
       for(int i=0; i<=Deck.size()+8; i++) {
          for(Hand hand:hands) {
             hand.addSingleCard(Deck.deal());
           }
       }

Answer 1

Collections.frequency

You have this feature already available from Collections class, in the frequency method.

public static int frequency(Collection<?> c, Object o)

That will return the number of occurrences of a specific object inside a collection.

Mind that without providing a vaild equals method this won’t work or at least won’t work with the equality you have in mind, since Java does’t know your meaning of equality.