Java收集算法：交易卡

import java.util.*;
// 来 自 n o w j a v a . c o m

public class Deal {

    public static void main(String[] args) {

        if (args.length < 2) {

            System.out.println("Usage: Deal hands cards");

            return;

        }

        int numHands = Integer.parseInt(args[0]);

        int cardsPerHand = Integer.parseInt(args[1]);


        // Make a normal 52-card deck.

        String[] suit = new String[] { "spades", "hearts", "diamonds",

                "clubs" };

        String[] rank = new String[] { "ace", "2", "3", "4", "5", "6", "7",

                "8", "9", "10", "jack", "queen", "king" };

        List<String> deck = new ArrayList<String>();

        for (int i = 0; i < suit.length; i++)

            for (int j = 0; j < rank.length; j++)

                deck.add(rank[j] + " of " + suit[i]);


        // Shuffle the deck.//N o w J a v a . c o m - 时代Java 提供

        Collections.shuffle(deck);


        if (numHands * cardsPerHand > deck.size()) {

            System.out.println("Not enough cards.");

            return;

        }


        for (int i = 0; i < numHands; i++)

            System.out.println(dealHand(deck, cardsPerHand));

    }


    public static <E> List<E> dealHand(List<E> deck, int n) {

        int deckSize = deck.size();

        List<E> handView = deck.subList(deckSize - n, deckSize);

        List<E> hand = new ArrayList<E>(handView);

        handView.clear();

        return hand;

    }

}