Is there a synchronized queue in Java? [closed]

Question

Is there a synchronized Queue class in Java? I'm looking for something like Vector (which is synchronized) vs ArrayList (which is not), but instead of implementing the List interface, I'm looking for it to implement Queue.

Note that there is no Collections.synchronizedQueue method to wrap an unsynchronized queue and make it synchronized.

Celio

ConcurrentLinkedDeque – Trisa

If you look through the docs of the classes that extend docs.oracle.com/javase/7/docs/api/java/util/AbstractQueue.html you'll probably find what you're looking for. And docs.oracle.com/javase/7/docs/api/java/util/concurrent/… #2695926 – Minimalist

This seems like a very valid question, since Queue seems to be different from other Java collections in this respect. I am going to request that it is re-opened, having edited to clarify the question a little. – Or

Answer 1

Look at ArrayBlockingQueue and another BlockingQueue implementations.

From documentation:

A Queue that additionally supports operations that wait for the queue to become non-empty when retrieving an element, and wait for space to become available in the queue when storing an element.

Cutanddried

This is a blocking queue, which is not what was requested. – Or

@Or I believe OP wanted to find thread-safe implementation, in this case my answer is correct – Cutanddried

I was concerned about the blocking behaviour. If the reader/writer blocks, then this is very different behaviour than in a standard non-blocking queue. But reading the API, I think this is optional and you can read/write non-blocking as well. So you are correct. – Or

It is possible to avoid blocking, but ArrayBlockingQueue has a fixed capacity. – Emcee

This answer is missing the point: BlockingQueue implementations are thread-safe. source – Hardboard

Answer 2

You can use 'BlockingQueue', below link may help you to get better idea about it

BlockingQueue, Queue Implementations

Sienkiewicz

Answer 3

How about SynchronousQueue? Refer: http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/SynchronousQueue.html

Reginareginald

that's a very specialized implementation, not really general use. – Certes