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Join Date: Apr 2007
Location: New Zealand
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Newbie Poster
How do I count numbers inside LinkedList? I am trying to make text based blackjack game. I already made :
- Card class which create new card based on integer
- Deck class which consists of Deck LinkedList populated by Card.
I also made 2 new LinkedLists for gambler and dealer. I already managed to remove elements from a shuffled Deck and add them to the new Lists using
However I am stumped on how to count the total of the elements inside gambler and dealer without removing them. If I used peek() method, it only take the head of the lists.
Any help is appreciated.
doel
- Card class which create new card based on integer
- Deck class which consists of Deck LinkedList populated by Card.
I also made 2 new LinkedLists for gambler and dealer. I already managed to remove elements from a shuffled Deck and add them to the new Lists using
gambler.addFirst(myApp.cards.removeFirst());
However I am stumped on how to count the total of the elements inside gambler and dealer without removing them. If I used peek() method, it only take the head of the lists.
Any help is appreciated.
doel
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Join Date: Jan 2007
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Junior Poster
tried to just run the list trough a loop and add the value of every element to a seperate counter?
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Join Date: May 2007
Location: USA
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If you are using the Java Collections LinkedList class, you can use the size() method to determine the number of elements in the list.
I am wondering though, why not use a different collection to hold the cards? Would a Vector of ArrayList work just as well? Is there a compelling reason you are using LinkedList? You should examine your usage of a collection of objects and choose the collection implementation based upon your needs.
I am wondering though, why not use a different collection to hold the cards? Would a Vector of ArrayList work just as well? Is there a compelling reason you are using LinkedList? You should examine your usage of a collection of objects and choose the collection implementation based upon your needs.
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Join Date: Apr 2007
Location: New Zealand
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Newbie Poster
I an a newbie at Java so I don't know much about Vector of ArrayList. Anyway I solved it by creating a temp LinkedList. I don't know if it's the most effective solution......
Thanks again for all input.
public static int countCards(LinkedList<Card> content){ int total = 0; LinkedList<Card> temp = new LinkedList<Card>(); temp = content; while (!temp.isEmpty()){ total += temp.removeFirst().rank(); } return total; }
Thanks again for all input.
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Join Date: May 2007
Location: USA
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Originally Posted by doel.jangkrik 
I an a newbie at Java so I don't know much about Vector of ArrayList.
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Anyway I solved it by creating a temp LinkedList. I don't know if it's the most effective solution......
public static int countCards(LinkedList<Card> content){ int total = 0; LinkedList<Card> temp = new LinkedList<Card>(); temp = content; while (!temp.isEmpty()){ total += temp.removeFirst().rank(); } return total; }
Thanks again for all input.
You don't really need to remove from the list just to examine things in the list. You can simply iterate the collection with a "for each" loop, so your example code becomes:
public static int countCards(LinkedList<Card> content){ int total = 0; for (Card card : content){ total += card.rank(); } return total; }
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