工厂方法模式【FACTORY METHOD PATTERN】

 
  public class Main {     public static void main(String[] args) {         Factory factory = new IDCardFactory();         Product card1 = factory.create("1");         Product card2 = factory.create("2");         Product card3 = factory.create("3");         System.out.println("card:"+factory.getOwners());         card1.use();         card2.use();         card3.use();     } }