BlockingDeque iterator() method in Java with examples
Last Updated :
01 Oct, 2019
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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:
Java
Java
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());
}
}
}
Output:
Program 2:
The iterator values of BlockingDeque are: 74381793 5278367 35658786 7855642
// 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:
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/BlockingDeque.html#iterator()
The iterator values of BlockingDeque are: Geeks forGeeks A Computer Portal
