Executors遗嘱执行人

In all of the previous examples, there's a close connection between the task being done by a new thread, as defined by its Runnable object, and the thread itself, as defined by a Thread object. 在前面的所有示例中，由新线程（由其Runnable对象定义）完成的任务与由Thread对象定义的线程本身之间存在着密切的联系。This works well for small applications, but in large-scale applications, it makes sense to separate thread management and creation from the rest of the application. 这适用于小型应用程序，但在大型应用程序中，将线程管理和创建与应用程序的其余部分分离是有意义的。Objects that encapsulate these functions are known as executors. 封装这些函数的对象称为执行器。The following subsections describe executors in detail.以下小节详细描述了执行人。

• Executor Interfaces define the three executor object types.执行器接口定义三种执行器对象类型。
• Thread Pools are the most common kind of executor implementation.线程池是最常见的执行器实现。
• Fork/Join is a framework (new in JDK 7) for taking advantage of multiple processors.Fork/Join是一个利用多处理器的框架（JDK 7中新增）。