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Factory Pattern
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Example
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Java
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.. code-block:: java

  public class CardGame {
    public static CardGame createCardGame(GameType type) {
      if (type == GameType.Poker) {
        return new PokerGame();
      } else if (type == GameType.BlackJack) {
        return new BlackJackGame();
      }
      return null;
    }
  }