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

Question

这个问题在这里已经有了答案:

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

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

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 内部返回会导致 exceptions 丢失。

finally block 中的 return 语句将导致 try 或 catch block 中可能抛出的任何异常被丢弃。

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:根据 JLS 14.17 - return 语句总是突然完成。