java - 我们可以在finally block 中使用 "return"吗

Question

这个问题已经有答案了:

Returning from a finally block in Java (6 个回答)

Multiple returns: Which one sets the final return value? (7 个回答)

已关闭 9 年前。

我们可以在finally block 中使用return语句吗？这会导致任何问题吗？

Answer 1

从finally block 内部返回将导致异常丢失。

finally block 内的 return 语句将导致 try 或 catch block 中可能引发的任何异常被丢弃。

根据Java Language Specification:

If execution of the try block completes abruptly for any other reason R, then the finally block is executed, and then there is a choice:

   If the finally block completes normally, then the try statement
   completes  abruptly for reason R.

   If the finally block completes abruptly for reason S, then the try
   statement  completes abruptly for reason S (and reason R is
   discarded).

注意:按照JLS 14.17 - return 语句总是突然完成。