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()