In regular expressions, a normal character is an atom that denotes the singleton set of strings containing only itself.
在正则表达式中，一个常规字符是一个原子，它表示只包含其自身的单字符串集。
As an EJB, the Singleton has access to the standard set of EJB middleware services - transaction management, security, remoteing, dependency injection and so on.
作为一个EJB，该单例可以访问标准的EJB中间件服务集——事务管理、安全、远程、依赖注入等等。
The only other method (set in italics) in the class is used to get a reference to the singleton and to create it if it is not yet instantiated.
该类中仅剩的另一个方法(用斜体标识)用于获取该单件的一个引用，如果尚未实例化则创建它。
应用推荐