Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
126 views
in Technique[技术] by (71.8m points)

Try-with-resources and return statements in java

I'm wondering if putting a return statement inside a try-with-resources block prevents the resource to be automatically closed.

try(Connection conn = ...) {
    return conn.createStatement().execute("...");
}

If I write something like this will the Connection be closed? In the Oracle documentation it is stated that:

The try-with-resources statement ensures that each resource is closed at the end of the statement.

What happens if the end of the statement is never reached because of a return statement?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

Based on Oracle's tutorial, "[the resource] will be closed regardless of whether the try statement completes normally or abruptly". It defines abruptly as from an exception.

Returning inside the try is an example of abrupt completion, as defined by JLS 14.1.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

1.4m articles

1.4m replys

5 comments

57.0k users

...