How to Iterate over a Queue in Java?

Queue is a concept of Linear Data Structure that follows the concept of FIFO(First In First Out). Queues are majorly used to maintain the order of the elements to which they are added. In this article, we will learn to perform Queue Iteration in Java.

Queue Iteration Program in Java

Syntax with Examples

Iterator<String> it = queue.iterator();
while (it.hasNext()) {
     // print elements 
}

Below is the program for Queue Iteration in Java:

Java

// Java Program demonstrating
// Queue Iteration
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Queue;

// Driver Class
public class Gfg {
      // Main function
    public static void main(String[] args) {

          // Iterating Queue
        Queue<String> studentQueue = new LinkedList<>();

          // Inserting element in Queue
        studentQueue.add("Shivansh");
        studentQueue.add("Sohan");
        studentQueue.add("Mohan");
        studentQueue.add("Shivam");
        studentQueue.add("Radha");
        studentQueue.add("Rakesh");

          // Initialising Iterator
        Iterator<String> studentQueueIterator = studentQueue.iterator();

          // Iterating Queue
          while (studentQueueIterator.hasNext()) {
            String name = studentQueueIterator.next();
            System.out.println(name);
        }
    }
}

Output

Shivansh
Sohan
Mohan
Shivam
Radha
Rakesh