Why is the declared type different from the instantiated type?

Asked Mar 28 '18 at 12:32

Active Mar 28 '18 at 12:32

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final Map map = new ConcurrentHashMap<>();

Why declare a Map and instantiate a ConcurrentHashMap?

asked Mar 28 '18 at 12:32

nicomp

1

you may want to google "code against interfaces". The explanation is way too broad to explain here – Stultuske Mar 28 '18 at 12:32
1

Duplicate of https://stackoverflow.com/q/383947/6253321 – cpp beginner Mar 28 '18 at 12:34

0 Answers0