What is the maximum capacity of Java BlockingQueue?

Here we have a blockingQueue that has a capacity equal to 10. It means that when a producer tries to add an element to an already full queue, depending on a method that was used to add it (offer(), add() or put()), it will block until space for inserting object becomes available.

What is the remaining capacity of BlockingQueue?

A BlockingQueue may be capacity bounded. At any given time it may have a remainingCapacity beyond which no additional elements can be put without blocking. A BlockingQueue without any intrinsic capacity constraints always reports a remaining capacity of Integer. MAX_VALUE.

What is BlockingQueue Java?

BlockingQueue , represents a queue which is thread safe to put elements into, and take elements out of from. … For instance, if a thread tries to take an element and there are none left in the queue, the thread can be blocked until there is an element to take.

What is BlockingQueue in Java concurrency?

A blocking queue is a queue that blocks when you try to dequeue from it and the queue is empty, or if you try to enqueue items to it and the queue is already full. A thread trying to dequeue from an empty queue is blocked until some other thread inserts an item into the queue.

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Does a queue have a size?

queue::size() is used to check whether the size of the associated queue container. This function returns an unsigned int value, i.e the size of the queue container, or the number of elements present in a queue container. This function returns 0 if the queue is empty or having no elements in it.

What is the remaining capacity of BlockingQueue whose intrinsic capacity is not defined?

What is the remaining capacity of BlockingQueue whose intrinsic capacity is not defined? Explanation: A BlockingQueue without any intrinsic capacity constraints always reports a remaining capacity of Integer. MAX_VALUE.

What is array BlockingQueue in Java?

ArrayBlockingQueue is bounded, blocking queue that stores the elements internally backed by an array. ArrayBlockingQueue class is a member of the Java Collections Framework. … If you try to put an element into a full queue or to take an element from an empty queue then the queue will block you.

What happens when blocking queue is full?

BlockingQueue interface supports flow control (in addition to queue) by introducing blocking if either BlockingQueue is full or empty. … Similarly, it blocks a thread trying to delete from an empty queue until some other threads insert an item. BlockingQueue does not accept a null value.

Is ConcurrentLinkedQueue thread safe?

3. ConcurrentLinkedQueue. A ConcurrentLinkedQueue is an unbounded, thread-safe, and non-blocking queue.

Is BlockingQueue synchronized?

No, you do not need to synchronize access to the object properties, or even use volatile on the member variables. All actions performed by a thread before it queues an object on a BlockingQueue “happen-before” the object is dequeued. That means that any changes made by the first thread are visible to the second.

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How does BlockingQueue work internally?

A blocking queue is a queue that blocks when you try to dequeue from it and the queue is empty, or if you try to enqueue items to it and the queue is already full. A thread trying to dequeue from an empty queue is blocked until some other thread inserts an item into the queue.

What is BlockingQueue how can we implement producer consumer problem using blocking queue?

The BlockingQueue interface provides two methods put() and take() which are used implicitly in blocking the Producer and the Consumer thread respectively. The thread (Consumer) trying to remove item from an empty queue waits or is blocked until the Producer thread adds an item to the queue.

Is queue synchronized in Java?

Note that there is no Collections. synchronizedQueue method to wrap an unsynchronized queue and make it synchronized. This seems like a very valid question, since Queue seems to be different from other Java collections in this respect.

Is queue FIFO or LIFO?

Stacks are based on the LIFO principle, i.e., the element inserted at the last, is the first element to come out of the list. Queues are based on the FIFO principle, i.e., the element inserted at the first, is the first element to come out of the list.

Is empty queue Java?

ConcurrentLinkedQueue isEmpty() method in Java

The isEmpty() method of ConcurrentLinkedQueue is used to check if this queue is empty or not. It returns true if ConcurrentLinkedQueue contains zero number of elements means if the ConcurrentLinkedQueue is empty.

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What is queue ADT?

Queue is a linear data structure in which the insertion and deletion operations are performed at two different ends. In a queue data structure, adding and removing elements are performed at two different positions. The insertion is performed at one end and deletion is performed at another end.