什么时候具体用到'单例模式'.

Ref:　　stackoverflow

　　We use single global　LogManager  to maintain a set of shared state about Loggers and log services.

  • Manages a hierarchical namespace of Logger objects. All named Loggers are stored in this namespace.
  • Manages a set of logging control properties. These are simple key-value pairs that can be used by Handlers and other logging objects to configure themselves.

　　Every Java application has a single instance of class Runtime that allows the application to interface with the environment in which the application is running. The current runtime can be obtained from the getRuntime method.

posted @ 2014-01-19 01:38  wonkju  阅读(864)  评论(0)  编辑  收藏  举报