How to know whether there is a exception that untreated in scala code?

Question

in java, if there is a exception in code and you are untreated or not throwing out, compiling will be failed. But in scala, it will be compiling successfully.

So how to know whether there is a exception that untreated in scala code?

The [prevalent opinion](http://stackoverflow.com/q/613954/2032064) on checked exceptions is that they are not a good idea so you shouldn't miss them much. — Mifeet, May 12 '16 at 09:32

Thilo · Answer 1 · 2016-05-12T02:34:09.853

0

The situation is the same as for unchecked exceptions (RuntimeExceptions) in Java: the compiler won't complain about them not being handled.

You have to rely on the source code and documentation to see what exceptions you might get from a piece of code.

In Scala, you should probably avoid exceptions in favour of Try monads when you expect the caller to deal with them (i.e. when you would use a checked exception in Java).

edited May 12 '16 at 02:34

answered May 12 '16 at 02:28

Thilo

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But I don't konw whether there is a exception, how to avoid it? how do you check exception in scala? – Guo May 12 '16 at 02:41
You cannot. All exceptions are unchecked. Of course, you can still catch them if you feel that you should. But the compiler won't force you. – Thilo May 12 '16 at 02:49
Thanks for your answer! – Guo May 12 '16 at 02:51
@Guo You should consider to award this answer as correct. – WestCoastProjects May 14 '16 at 06:27

How to know whether there is a exception that untreated in scala code?

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