Java SynchronousQueue
Java SynchronousQueue is a concurrent, thread-safe implementation of the BlockingQueue interface in the Java Collections Framework. Unlike other blocking queues, SynchronousQueue does not have an internal capacity to store elements. Instead, it acts as a rendezvous point between producer and consumer threads, allowing them to synchronize their activities. When a producer thread tries to add an element to a SynchronousQueue, it will block until a consumer thread is ready to consume the element. Similarly, when a consumer thread tries to remove an element from a SynchronousQueue, it will block until a producer thread is ready to produce the element. SynchronousQueue is commonly used in scenarios where handoff between threads is required, such as task handoff between threads in thread pools or event-based communication between threads. It offers methods for adding and removing elements, as well as blocking operations for waiting for producer and consumer threads to synchronize. SynchronousQueue provides a lightweight and efficient solution for inter-thread communication in Java applications.