Is Deque Thread Safe Java

The BlockingDeque interface in the java. util. concurrent class represents a deque which is thread safe to put into, and take instances from. … Thus, a deque is a queue which you can insert and take elements from, from both ends.

Is std :: Deque thread-safe?

3 Answers. Multiple readers are safe. Multiple threads may simultaneously read the contents of a single container, and this will work correctly. Naturally, there must not be any writers acting on the container during the reads.

Are Arraylists thread-safe in Java?

ArrayList , on the other hand, is unsynchronized, making them, therefore, not thread safe. With that difference in mind, using synchronization will incur a performance hit. So if you don’t need a thread-safe collection, use the ArrayList .