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 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()); } } } |
The iterator values of BlockingDeque are: 74381793 5278367 35658786 7855642
Program 2:
// 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()); } } } |
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()