ArrayBlockingQueue is a bounded blocking queue in Java that is backed by an array. It is part of the java.util.concurrent package and provides thread-safe operations for adding and removing elements from the queue. The size of the queue is fixed at the time of creation and cannot be changed.

Some key features of ArrayBlockingQueue are:

• It is a blocking queue, which means that when you try to add an element to the queue and it is full, the operation will block until there is space in the queue.
• It is thread-safe, so multiple threads can add or remove elements from the queue without causing data corruption or other synchronization issues.
• It is backed by an array, which means that it has a fixed capacity and cannot grow or shrink dynamically.

Here is an example of using ArrayBlockingQueue in Java:

import java.util.concurrent.ArrayBlockingQueue;

public class Example {
    public static void main(String[] args) {
        // create a new blocking queue with capacity of 10
        ArrayBlockingQueue<Integer> queue = new ArrayBlockingQueue<>(10);

        // add some elements to the queue
        queue.add(1);
        queue.add(2);
        queue.add(3);

        // remove an element from the queue
        int first = queue.poll();

        // print the first element that was removed
        System.out.println("First element: " + first);
    }
}

In this example, we create a new ArrayBlockingQueue with a capacity of 10. We then add three elements to the queue using the add() method, and remove the first element using the poll() method. Finally, we print the first element that was removed.

ArrayBlockingQueue is a useful data structure for situations where you need to process items in a fixed order, and where it is important to block if the queue is full or empty. It can be used in a variety of applications, such as producer-consumer systems, event-driven systems, and more.