单件模式(Singleton创建型)c#简单例子

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单件(Singleton创建型模式)c#简单例子

需要生成一个实例时，可采用单件模式

例子中只可生成一个玩家，并对玩家进行测试。单线程例子如下：

namespace singletonpattern{    public partial class SingletonForm : Form    {        public SingletonForm()        {            InitializeComponent();        }        private void btnDisplay_Click(object sender, EventArgs e)        {            player player1 = player.GetPlayer;            player1.jump = "跳一跳";            player1.move = "走一走";//对player1赋值            listBox1.Items.Add("------play1.jump,player1.move-------");            listBox1.Items.AddRange(new string[] { player1.jump, player1.move });            player player2 = player.GetPlayer;//未对player2赋值，但值与player1相同            listBox1.Items.Add("------play2.jump,player2.move-------");            listBox1.Items.AddRange(new string[] { player2.jump, player2.move });            player1.jump = "跳一跳,跑一跑";            player1.move = "走一走，看--看";//修改的player1，player2也被修改，说明是同一个类            listBox1.Items.Add("------play2.jump,player2.move-------");            listBox1.Items.AddRange(new string[] { player2.jump, player2.move });            listBox1.Items.Add(object.ReferenceEquals(player1, player2));//显示为true,说明两个为同一个类        }    }    class player    {        private player()//单例第一步，设构造函数为私有的。        { }        private static player getplayer;        public static player GetPlayer//第二步获取单例        {            get            {                if (getplayer == null)//判断是否实例唯一                {                    getplayer = new player();                }                return getplayer;            }        }         public string jump { get; set; }//单例中的属性        public string move { get; set; }    }}

其中

 private static player getplayer;        public static player GetPlayer//第二步获取单例        {            get            {                if (getplayer == null)//判断是否实例唯一                {                    getplayer = new player();                }                return getplayer;            }        }

可简化为一句

       public static readonly player GetPlayer = new player();//简化单例模式

此文件由朱朱编写，转载请注明出自朱朱家园http://blog.csdn.net/zhgl7688

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