BlockingDeque iterator() method in Java with examples Last Updated : 01 Oct, 2019 Summarize Comments Improve Suggest changes Share Like Article Like Report The iterator() method of BlockingDeque returns an iterator over the elements in this deque in a proper sequence. The elements will be returned in order from first (head) to last (tail). The returned iterator is a "weakly consistent" iterator. Syntax: public Iterator iterator() Parameters: This method does not accept any parameter. Returns: This method returns an iterator over the elements in this deque in a proper sequence. Note: The iterator() method of BlockingDeque has been inherited from the LinkedBlockingDeque class in Java. Below programs illustrate iterator() method of BlockingDeque: Program 1: Java // Java Program Demonstrate iterator() // method of BlockingDeque import java.util.concurrent.LinkedBlockingDeque; import java.util.concurrent.BlockingDeque; import java.util.*; public class GFG { public static void main(String[] args) { // create object of BlockingDeque BlockingDeque<Integer> BD = new LinkedBlockingDeque<Integer>(); // Add numbers to front of BlockingDeque BD.addFirst(7855642); BD.addFirst(35658786); BD.addFirst(5278367); BD.addFirst(74381793); // Call iterator() method of BlockingDeque Iterator iteratorVals = BD.iterator(); // Print elements of iterator // created from PriorityBlockingQueue System.out.println("The iterator values" + " of BlockingDeque are:"); // prints the elements using an iterator while (iteratorVals.hasNext()) { System.out.println(iteratorVals.next()); } } } Output: The iterator values of BlockingDeque are: 74381793 5278367 35658786 7855642 Program 2: Java // Java Program Demonstrate iterator() // method of BlockingDeque // when list is of strings import java.util.concurrent.LinkedBlockingDeque; import java.util.concurrent.BlockingDeque; import java.util.*; public class GFG { public static void main(String[] args) { // create object of BlockingDeque BlockingDeque<String> BD = new LinkedBlockingDeque<String>(); // Add numbers to front of BlockingDeque BD.add("Geeks"); BD.add("forGeeks"); BD.add("A"); BD.add("Computer"); BD.add("Portal"); // Call iterator() method of BlockingDeque Iterator iteratorVals = BD.iterator(); // Print elements of iterator // created from BlockingQueue System.out.println("The iterator values" + " of LinkedBlockingDeque are:"); // prints the elements using an iterator while (iteratorVals.hasNext()) { System.out.println(iteratorVals.next()); } } } Output: The iterator values of BlockingDeque are: Geeks forGeeks A Computer Portal Reference: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/BlockingDeque.html#iterator() Comment More infoAdvertise with us Next Article DelayQueue iterator() method in Java with Examples G gopaldave Follow Improve Article Tags : Java Java-Collections Java-Functions java-interfaces Practice Tags : JavaJava-Collections Similar Reads DelayQueue iterator() method in Java with Examples The iterator() method of DelayQueue is used to return an iterator over all the elements in the DelayQueue. 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