我们可以使用“返回”吗？在最后一块 [英] Can we use "return" in finally block

问题描述

我们可以在 finally 块中使用return语句。这会导致任何问题吗？

Can we use return statement in finally block. Can this cause any problem?

推荐答案

从最后块内返回将导致例外丢失。

Returning from inside a finally block will cause exceptions to be lost.

finally块内的return语句将导致任何异常可能会抛出try或catch块而被丢弃。

根据 Java语言规范：

如果执行try块因任何其他原因突然完成
R，则执行finally块，然后有一个选择：

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 - 返回语句总是突然完成。

Note: As per JLS 14.17 - a return statement always completes abruptly.

这篇关于我们可以使用“返回”吗？在最后一块的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！