JDK?API文档中,分别代表什么意思?

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JDK API文档中,分别代表什么意思?

(2007-08-22 22:47:18)转载 分类: Java技术 Type Parameter Conventions
You have already seen the angle bracket and single letter notation used to
represent a type parameter. By convention, a type parameter is a single,
uppercase letter — this allows easy identification and distinguishes a type
parameter from a class name. The most common type parameters you will see are:

* — Type
* — for Type, when T is already in use
* — Element (used extensively by the Java Collections Framework)
* — Key
* — Value
* — Number