public class CardDeck
{
private int[] card = new int[52];

}

private int[][] = new int[4][13];

public enum CardColor
{
   Red, Green, Blue, Yellow
}

public class Card
{
   private final CardColor _color;
   private final int _number;

   public Card(CardColor color, int number)
   {
       _color = color;
       _number = number;
   }

   public CardColor getColor() { return _color; }
   public int getNumber() { return _number; }

   @override
   public String toString()
   {
       return "" + _color + " " + _number;
   }
}

public class Program
{
   public static void main()
   {
       final int max_number = 13;
       final Card[] cards = new Card[CardColor.values().length() * max_number];
       int i = 0;

       for (CardColor color : CardColor.values())
           for (int num = 1; num <= max_number; ++num)
               cards[i++] = new Card(color, num);

       for (Card c : cards)
           System.out.println(c);
   }
}