(Design Pattern) Singleton.
2024-08-23 14:40:41
Role:
The purpose of the Singleton pattern is to ensure that there is only one instance of a class, and that there is a global access point to that object.
Design:
- Make the constructor private and add a private static constructor as well.
- Add a private static read-only object that is internally instantialed using the private constructor.
- Add a public static property that accesses the private object.
Implementation:
public sealed class Singleton
{
// Private constructor.
private Singleton()
{
Console.WriteLine("One instance is created.");
} // private object instantiated with private constructor.
private static readonly Singleton instance = new Singleton(); // Public static property to get the object.
public static Singleton UniqueInstance
{
get
{
return instance;
}
}
}
class Program
{
static void Main(string[] args)
{
Singleton s0 = Singleton.UniqueInstance;
Singleton s1 = Singleton.UniqueInstance;
Singleton s2 = Singleton.UniqueInstance;
}
}
最新文章
- 解决VS调试时断点不会命中
- offsetTop、clientTop、scrollTop、offsetTop属性
- h5 hdf5 文件转 tif 流程
- 很全的corel图像分类，场景识别图像库
- css的框架——global.css
- 如何调试什么时候SaveFileDialog会被Dispose
- Linux PATH变量的设置
- 单例-b
- 记一个SwipeMenuListView侧滑删除错乱的Bug
- Xapian索引-文档检索过程分析之匹配百分比
- Nginx禁止IP直接访问网站
- JavaScript（一）
- Mysql中NUMERIC和DECIMAL类型区别比较
- Dom4j基础
- webstorm 格式化代码及常用快捷键
- 使用mod_deflate模块压缩页面优化传输速度
- openLayer3地图的使用心得
- 【译】AI 让科技公司变得更强大吗
- 02 Tensorflow的安装配置
- ASP.NET网站性能优化