例子:
using System;
namespace Factory
{
public interface IFruit
{
}
public class Orange : IFruit
{
public Orange()
{
Console.WriteLine("An orange is got!");
}
}
public class Apple : IFruit
{
public Apple()
{
Console.WriteLine("An apple is got!");
}
}
public class FruitFactory
{
private static FruitFactory _instance = new FruitFactory();
public static FruitFactory Instance
{
get { return _instance; }
}
public IFruit MakeFruit(string Name)
{
IFruit MyFruit = null;
try
{
Type type = Type.GetType(Name, true);
MyFruit = (IFruit)Activator.CreateInstance(type);
}
catch (TypeLoadException e)
{
Console.WriteLine("I dont know this kind of fruit,exception caught - {0}", e.Message);
}
return MyFruit;
}
}
public class Test
{
static void Main()
{
string FruitName = Console.ReadLine();
FruitFactory.Instance.MakeFruit("Factory." + FruitName);
}
}
}
运行:
输入: Apple 查看结果