ArrayBlockingQueue remainingCapacity() Method in Java
Last Updated :
04 Apr, 2023
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ArrayBlockingQueue is bounded, blocking queue that stores the elements internally backed by an array.
Java
Java
- ArrayBlockingQueue class is a member of the Java Collections Framework.
- Bounded means it will have a fixed size, you can not store number the elements more than the capacity of the queue.
- The queue also follows FIFO (first-in-first-out) rule for storing and removing elements from the queue.
- 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.
public int remainingCapacity()Parameters: The method does not take any parameters. Return Value: The method returns the remaining capacity of the queue. Below programs illustrate remainingCapacity() method of ArrayBlockingQueue: Program 1:
// Program to demonstrate remainingCapacity() method
// of ArrayBlockingQueue
import java.util.concurrent.ArrayBlockingQueue;
public class GFG {
public static void main(String[] args)
{
// Define capacity of ArrayBlockingQueue
int capacity = 5;
// Create object of ArrayBlockingQueue
ArrayBlockingQueue<Integer> queue = new
ArrayBlockingQueue<Integer>(capacity);
// Add elements to ArrayBlockingQueue
queue.add(23);
queue.add(32);
// Print queue after adding numbers
System.out.println("Queue :" + queue);
// Check remaining capacity
int remainingCapacity = queue.remainingCapacity();
System.out.println("Remaining Capacity:" +
remainingCapacity);
// Add elements to ArrayBlockingQueue
queue.add(54);
queue.add(78);
// Print queue after adding numbers
System.out.println("Queue :" + queue);
// Check remaining capacity
System.out.println("Remaining Capacity:" +
queue.remainingCapacity());
}
}
Output:
Program 2:
Queue :[23, 32] Remaining Capacity:3 Queue :[23, 32, 54, 78] Remaining Capacity:1
// Program to demonstrate remainingCapacity() method
// of ArrayBlockingQueue
import java.util.concurrent.ArrayBlockingQueue;
public class GFG {
// Create a User Object with name and age as an attribute
public class User {
public String name;
public String age;
User(String name, String age)
{
this.name = name;
this.age = age;
}
}
// Main Method
public static void main(String[] args)
{
GFG gfg = new GFG();
gfg.RemainingCapacityExample();
}
// Method to give example of remaining capacity function
public void RemainingCapacityExample()
{
// Define capacity of ArrayBlockingQueue
int capacity = 5;
// Create object of ArrayBlockingQueue
ArrayBlockingQueue<User> queue = new
ArrayBlockingQueue<User>(capacity);
// Create user objects
User user1 = new User("Aman", "24");
User user2 = new User("Amar", "23");
User user3 = new User("Sanjeet", "25");
// Add Objects to ArrayBlockingQueue
queue.offer(user1);
queue.offer(user2);
queue.offer(user3);
// Check remaining capacity
int remainingCapacity = queue.remainingCapacity();
System.out.println("Remaining Capacity:" +
remainingCapacity);
User user4 = new User("Suvo", "26");
User user5 = new User("Ravi", "22");
// Adding more objects
queue.offer(user2);
queue.offer(user3);
// Check remaining capacity
remainingCapacity = queue.remainingCapacity();
System.out.println("Remaining Capacity:" +
remainingCapacity);
}
}
Output:
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ArrayBlockingQueue.html#remainingCapacity()
Remaining Capacity:2 Remaining Capacity:0
