Take purchasing a phone card as an example to illustrate the simple factory pattern
public interface Card { public void buyTelCard(); }
public class MobileCard implements Card { @Override public void buyTelCard() { System.out.println("购买移动卡"); } }
public class UnicomCard implements Card { @Override public void buyTelCard() { System.out.println("购买联通卡"); } }
public class CardFactory { public Card buyCard(String styleName) { if (styleName.toLowerCase().equals("mobile")) { return new MobileCard(); } else if (styleName.toLowerCase().equals("unicom")) { return new UnicomCard(); } return null; } }/** * * 简单工厂模式(Simple Factory Pattern) * */ public class Test { public static void main(String[] args) { CardFactory factory=new CardFactory(); factory.buyCard("mobile").buyTelCard(); } }
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