Return 'null' or throw exception

最新推荐文章于 2020-07-15 13:57:46 发布

转载最新推荐文章于 2020-07-15 13:57:46 发布 · 939 阅读

文章标签：

#exception #null #application #object

本文讨论了当方法未能找到预期对象时，应该返回空值还是抛出异常的问题。文章指出如果总是期望能找到值，则找不到时应抛出异常；若值可能缺失且这在应用逻辑中有效，则应返回空。

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转自：http://stackoverflow.com/questions/175532/return-null-or-throw-exception

I have a method that is suppose to return an object if it is found.

If it is not found, should I:

a) return null
b) throw an exception
c) other

if you are always expecting to find a value then throw the exception if it is missing. The exception would mean that there was a problem.
If the value can be missing or present and both are valid for the application logic then return a null.
More important: What do you do other places in the code? Consistency is important.