The iterator() method of ConcurrentLinkedQueue is used to returns an iterator of the same elements as this ConcurrentLinkedQueue 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()
Returns: This method returns the iterator having same elements as present in ConcurrentLinkedQueue in Proper Sequence.
Below programs illustrate iterator() method of ConcurrentLinkedQueue:
Example 1:
// Java Program Demonstrate iterator()// method of ConcurrentLinkedQueue import java.util.concurrent.*;import java.util.*; public class GFG { public static void main(String[] args) { // create an ConcurrentLinkedQueue ConcurrentLinkedQueue<String> queue = new ConcurrentLinkedQueue<String>(); // Add String to queue queue.add("Aman"); queue.add("Amar"); queue.add("Sanjeet"); queue.add("Rabi"); // Displaying the existing ConcurrentLinkedQueue System.out.println("ConcurrentLinkedQueue :\n" + queue); // Call iterator() method Iterator iterator = queue.iterator(); // Print elements of iterator System.out.println("\nThe String Values of iterator are:"); while (iterator.hasNext()) { System.out.println(iterator.next()); } }} |
Output:
ConcurrentLinkedQueue : [Aman, Amar, Sanjeet, Rabi] The String Values of iterator are: Aman Amar Sanjeet Rabi
Example 2:
// Java Program Demonstrate iterator()// method of ConcurrentLinkedQueue import java.util.concurrent.*;import java.util.*; public class GFG { public static void main(String[] args) { // create an ConcurrentLinkedQueue ConcurrentLinkedQueue<Integer> queue = new ConcurrentLinkedQueue<Integer>(); // Add Numbers to queue queue.add(4353); queue.add(7824); queue.add(78249); queue.add(8724); // Displaying the existing ConcurrentLinkedQueue System.out.println("ConcurrentLinkedQueue: " + queue); // Call iterator() method Iterator values = queue.iterator(); // Print elements of iterator System.out.println("\nThe Numbers of iterator are:"); while (values.hasNext()) { System.out.println(values.next()); } }} |
Output:
ConcurrentLinkedQueue: [4353, 7824, 78249, 8724] The Numbers of iterator are: 4353 7824 78249 8724
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentLinkedQueue.html#iterator–
