Deal

import java.util.*;

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.
    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;
  }
}