工厂模式

 1 public class A {
 2   public static void main(String[] args) {
 3     Factory factory = newFactory();
 4     System.out.println(factory.productString("蔬菜"));
 5     System.out.println(factory.productString("米饭"));
 6     System.out.println(factory.productInteger("一"));
 7     System.out.println(factory.productInteger("五"));
 8     }
 9 }
10  
11 public class Factory {
12     public String productString(String inputStr) {
13     if (inputStr.equals("水果"))
14        return "生产的水果";
15     if (inputStr.equals("蔬菜"))
16        return "生产的蔬菜";
17     return "请输入正确需求";
18 }
19  
20 public Integer productInteger(String inputStr) {
21     if (inputStr.equals("一"))
22         return 1;
23     if (inputStr.equals("二"))
24         return 2;
25     return 0;
26     }
27 }
28     

 1 //抽象产品类
 2 abstract class Product{
 3     public abstract void show();
 4 }
 5 //A产品
 6 class ProductA extends Product{
 7     public void show(){
 8     System.out.println("这是A产品");
 9     }
10 }
11 //B产品
12 class ProductB extends Product{
13     public void show(){
14     System.out.println("这是B产品");
15     }
16 }
17 //抽象工厂类
18 abstract class Factory{
19     public abstract Product manuPro();
20 }
21 //A工厂
22 class FactoryA extends Factory{
23     public Product manuPro(){
24     return new ProductA();
25     }
26 }
27 //B工厂
28 class FactoryB extends Factory{
29     public Product manuPro(){
30     return new ProductB();
31     }
32 }
33  
34 //主类
35 public class Main{
36     //A工厂生产A产品
37     FactoryA factoryA=new FactoryA();
38     Product product=factoryA.manuPro();
39     product.show();//"这是A产品"
40     //B工厂生产B产品
41     FactoryB factoryB=new FactoryB();
42     product=factoryB.manuPro();
43     product.show();//"这是B产品"
44 }