ArrayBlockingQueue iterator() Method in Java Last Updated : 26 Nov, 2018 Summarize Comments Improve Suggest changes Share Like Article Like Report The iterator() method of ArrayBlockingQueue class is used to returns an iterator of the same elements as this queue in a proper sequence. The elements returned from this method contains elements in order from first(head) to last(tail). The returned iterator is weakly consistent. Syntax: public Iterator iterator() Return Value: The method returns the iterator having same elements as present in ArrayBlockingQueue in proper sequence. Below programs illustrates iterator() method of ArrayBlockingQueue class: Program 1: Java // Program Demonstrate how to apply iterator() method // of ArrayBlockingQueue Class. import java.util.concurrent.ArrayBlockingQueue; import java.util.*; 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 5 elements to ArrayBlockingQueue queue.offer(423); queue.offer(422); queue.offer(421); queue.offer(420); queue.offer(424); // Print queue System.out.println("Queue is " + queue); // Call iterator() method and Create an iterator Iterator iteratorValues = queue.iterator(); // Print elements of iterator System.out.println("\nThe iterator values:"); while (iteratorValues.hasNext()) { System.out.println(iteratorValues.next()); } } } Output: Queue is [423, 422, 421, 420, 424] The iterator values: 423 422 421 420 424 Program 2: Java // Program Demonstrate how to apply iterator() method // of ArrayBlockingQueue Class. import java.util.concurrent.ArrayBlockingQueue; import java.util.*; public class GFG { public static void main(String[] args) { // Define capacity of ArrayBlockingQueue int capacity = 5; // Create object of ArrayBlockingQueue ArrayBlockingQueue<String> queue = new ArrayBlockingQueue<String>(capacity); // Add 5 elements to ArrayBlockingQueue queue.offer("User"); queue.offer("Employee"); queue.offer("Manager"); queue.offer("Analyst"); queue.offer("HR"); // Print queue System.out.println("Queue is " + queue); // Call iterator() method and Create an iterator Iterator iteratorValues = queue.iterator(); // Print elements of iterator System.out.println("\nThe iterator values:"); while (iteratorValues.hasNext()) { System.out.println(iteratorValues.next()); } } } Output: Queue is [User, Employee, Manager, Analyst, HR] The iterator values: User Employee Manager Analyst HR Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ArrayBlockingQueue.html#iterator Comment More infoAdvertise with us Next Article ArrayBlockingQueue offer() Method in Java A AmanSingh2210 Follow Improve Article Tags : Java Java-Collections Java - util package Java-Functions Java-ArrayBlockingQueue +1 More Practice Tags : JavaJava-Collections Similar Reads ArrayBlockingQueue Class in Java In Java, the ArrayBlockingQueue class is part of the java.util.concurrent package and implements the BlockingQueue interface. 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