package scut.designmodel.SimpleFactoryPattern;

//抽象產(chǎn)品類
abstract class Product{
  public abstract void Show();
}

//產(chǎn)品A類
class ProductA extends Product{

  @Override
  public void Show() {
    System.out.println("生產(chǎn)出了產(chǎn)品A");
  }
}

//產(chǎn)品B類
class ProductB extends Product{

  @Override
  public void Show() {
    System.out.println("生產(chǎn)出了產(chǎn)品C");
  }
}

//產(chǎn)品C類
class ProductC extends Product{

  @Override
  public void Show() {
    System.out.println("生產(chǎn)出了產(chǎn)品C");
  }
}

//簡(jiǎn)單工廠類
class Factory {
  public static Product Manufacture(String ProductName){
    switch (ProductName){
      case "A":
        return new ProductA();

      case "B":
        return new ProductB();

      case "C":
        return new ProductC();

      default:
        return null;

    }
  }
}

//工廠產(chǎn)品生產(chǎn)流程
public class SimpleFactoryPattern {
  public static void main(String[] args){
    Factory mFactory = new Factory();

    //客戶要產(chǎn)品A
    try {
      mFactory.Manufacture("A").Show();
    }catch (NullPointerException e){
      System.out.println("沒有這一類產(chǎn)品");
    }

    //客戶要產(chǎn)品B
    try {
      mFactory.Manufacture("B").Show();
    }catch (NullPointerException e){
      System.out.println("沒有這一類產(chǎn)品");
    }

    //客戶要產(chǎn)品C
    try {
      mFactory.Manufacture("C").Show();
    }catch (NullPointerException e){
      System.out.println("沒有這一類產(chǎn)品");
    }

    //客戶要產(chǎn)品D
    try {
      mFactory.Manufacture("D").Show();
    }catch (NullPointerException e){
      System.out.println("沒有這一類產(chǎn)品");
    }
  }
}

生產(chǎn)出了產(chǎn)品A
生產(chǎn)出了產(chǎn)品C
生產(chǎn)出了產(chǎn)品C
沒有這一類產(chǎn)品