抽象工厂模式 java_抽象工厂模式_抽象工厂模式的实现(2)

创建一个厂发电机/生产类传递一个信息，如形状或打印机拿到工厂

class FactoryProducer {
   public static AbstractFactory getFactory(String choice){
      if(choice.equalsIgnoreCase("SHAPE")){
         return new ShapeFactory();
      } else if(choice.equalsIgnoreCase("Printer")){
         return new PrinterFactory();
      }
      return null;
   }
}

下面的代码演示了如何使用抽象工厂模式。

public class Main {
   public static void main(String[] args) {

      //get shape factory
      AbstractFactory shapeFactory = FactoryProducer.getFactory("SHAPE");

      //get an object of Shape Circle
      Shape shape1 = shapeFactory.getShape("CIRCLE");

      //call draw method of Shape Circle
      shape1.draw();

      //get an object of Shape Rectangle
      Shape shape2 = shapeFactory.getShape("RECTANGLE");

      //call draw method of Shape Rectangle
      shape2.draw();
      
      //get an object of Shape Square 
      Shape shape3 = shapeFactory.getShape("SQUARE");

      //call draw method of Shape Square
      shape3.draw();

      //get printer factory
      AbstractFactory printerFactory = FactoryProducer.getFactory("printer");

    Printer printer1 = printerFactory.getPrinter("Paper");
    printer1.print();
    Printer printer2 = printerFactory.getPrinter("Web");
    printer2.print();
    Printer printer3 = printerFactory.getPrinter("Screen");
    printer3.print();
   }
}

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