![]() ![]() Do you want to be informed about new tutorials and articles? Then click here to sign up for the Happ圜 newsletter. If you still have questions, please ask them via the comment function. LinkedTransferQueue to block a producer thread until the element has been transferred to a consumer thread.In queue elements are always inserted at rear of queue. SynchronousQueue to transfer elements synchronously from a producer to a consumer. How to enqueue an element to queue Enqueue is the process of inserting an element to queue.DelayQueue to retrieve elements after a given waiting time. A queue of strings after (a) enqueue adds Jim (b) enqueue adds.PriorityQueue and PriorityBlockingQueue to retrieve elements sorted by priority.The following queues are for special purposes: Queue does not waste memory and utilize it effectively. It is easy to deQueue the highest order element. It is very easy to insert and remove elements. It is not easy to enQueue and deQueue elements. LinkedBlockingDeque as a thread-safe, blocking, bounded deque. There are various methods which are provided to insert, remove and examine the elements. It uses queue interface and util package for implementing queue in Java. ![]() LinkedBlockingQueue as a thread-safe, blocking, bounded queue if you expect a rather high contention between producer and consumer threads (it is best to test which implementation is better performing for your use case).ArrayBlockingQueue as a thread-safe, blocking, bounded queue, provided you expect little contention between producer and consumer threads.ConcurrentLinkedQueue and ConcurrentLinkedDeque as thread-safe, non-blocking, and unbounded queues/deques.Use ArrayDeque for single-threaded applications.The following are my recommendations for general purpose use: The usage recommendations are based on the characteristics of the JDK queue and deque implementations, which are described in more detail in the linked articles. A generic queue can hold elements of any non-primitive data type such as Strings, Arrays, classes and interfaces. This article explains implementing a generic queue in Java using a linked list. You can visit my previous article for custom implementation of linked list in Java. What Java Implementations Are Available, and Which Should You Use? You can implement a Queue data structure in Java either using arrays or using linked lists. While using linked list for the queue implementation, EnQueue operation is implemented by inserting element at the end of the list and DeQueue operation is implemented by deleting an element from the beginning of the list. The differences between the respective data structures are explained in the following articles: For details, see the main article about the deque data structure. ![]()
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