program.cs

adpter 、Singlen、Template设计模式的实现

using System;
using System.Collections.Generic;
using System.Text;

namespace Single
{
    public class Singleton
    {
        private static Singleton singleton = new Singleton();
        private Singleton() {
        Console.Out.WriteLine("已产生对象实例。");
    }
        public static Singleton getInstance()
        {
            //Lazy 
            //if singleton == null  singleton = new Singleton();  
            return singleton;
        }
    };

    class Program
    {
        static void Main(string[] args)
        {
            Console.Out.WriteLine("Start.");
            Singleton obj1 = Singleton.getInstance();
            Singleton obj2 = Singleton.getInstance();
            if (obj1 == obj2) {
               Console.Out.WriteLine("obj1和obj2是同一对象实例。");
            } else {
                Console.Out.WriteLine("obj1跟obj2并非同一对象实例。");
            }
           Console.Out.WriteLine("End.");
        }
    }
}