它能用于访问类实例中的字段和方法，从而提供了不需要类之间的任何源代码链接就能在运行时将类动态地挂钩在一起的方法。

It can be used to access fields and methods in instances of a class, providing a way of dynamically hooking together classes at runtime without the need for any source code links between the classes.

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可用它来访问类实例中的字段和方法，从而提供了一种在运行时将类动态地挂钩在一起，却无需类之间有任何源代码链接的方法。

It can be used to access fields and methods in instances of a class, giving a way of dynamically hooking together classes at runtime without the need for any source code links between the classes.

youdao