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Showing content from https://www.geeksforgeeks.org/java/queue-element-method-in-java/ below:

Queue element() method in Java

Last Updated : 11 Jul, 2025

The

element()

method of

Queue Interface

returns the element at the front the container. It does not deletes the element in the container. This method returns the head of the queue. This method differs from peek() only in that it throws an exception if this queue is empty.

Syntax:

E element()

Returns:

This method returns the

head

of the Queue.

Exception:

The function throws

NoSuchElementException

when the queue is empty and the function is called. Below programs illustrate element() method of Queue:

Program 1:

With the help of

LinkedList

Java


 // Java Program Demonstrate element()
// method of Queue

import java.util.*;

public class GFG {
    public static void main(String[] args)
        throws IllegalStateException
    {

        // create object of Queue
        Queue<Integer> Q
            = new LinkedList<Integer>();

        // Add numbers to end of Queue
        Q.add(7855642);
        Q.add(35658786);
        Q.add(5278367);
        Q.add(74381793);

        // print queue
        System.out.println("Queue: " + Q);

        // print head
        System.out.println("Queue's head: " + Q.element());
    }
}

Output:

Queue: [7855642, 35658786, 5278367, 74381793]
Queue's head: 7855642

Program 2:

With the help of

ArrayDeque

Java


 // Java Program Demonstrate element()
// method of Queue

import java.util.*;

public class GFG {
    public static void main(String[] args)
        throws IllegalStateException
    {

        // create object of Queue
        Queue<Integer> Q
            = new ArrayDeque<Integer>();

        // Add numbers to end of Queue
        Q.add(7855642);
        Q.add(35658786);
        Q.add(5278367);
        Q.add(74381793);

        // print queue
        System.out.println("Queue: " + Q);

        // print head
        System.out.println("Queue's head: " + Q.element());
    }
}

Output:

Queue: [7855642, 35658786, 5278367, 74381793]
Queue's head: 7855642

Program 3:

With the help of

LinkedBlockingDeque

Java


 // Java Program Demonstrate element()
// method of Queue

import java.util.*;
import java.util.concurrent.LinkedBlockingDeque;

public class GFG {
    public static void main(String[] args)
        throws IllegalStateException
    {

        // create object of Queue
        Queue<Integer> Q
            = new LinkedBlockingDeque<Integer>();

        // Add numbers to end of Queue
        Q.add(7855642);
        Q.add(35658786);
        Q.add(5278367);
        Q.add(74381793);

        // print queue
        System.out.println("Queue: " + Q);

        // print head
        System.out.println("Queue's head: " + Q.element());
    }
}

Output:

Queue: [7855642, 35658786, 5278367, 74381793]
Queue's head: 7855642

Program 4:

With the help of

ConcurrentLinkedDeque

Java


 // Java Program Demonstrate element()
// method of Queue

import java.util.*;
import java.util.concurrent.ConcurrentLinkedDeque;

public class GFG {
    public static void main(String[] args)
        throws IllegalStateException
    {

        // create object of Queue
        Queue<Integer> Q
            = new ConcurrentLinkedDeque<Integer>();

        // Add numbers to end of Queue
        Q.add(7855642);
        Q.add(35658786);
        Q.add(5278367);
        Q.add(74381793);

        // print queue
        System.out.println("Queue: " + Q);

        // print head
        System.out.println("Queue's head: " + Q.element());
    }
}

Output:

Queue: [7855642, 35658786, 5278367, 74381793]
Queue's head: 7855642

Below programs illustrate

exceptions thrown by this method

Program 5:

To show

NoSuchElementException

Java


 // Java Program Demonstrate element()
// method of Queue

import java.util.*;

public class GFG {
    public static void main(String[] args)
        throws IllegalStateException
    {

        // create object of Queue
        Queue<Integer> Q
            = new LinkedList<Integer>();

        // Add numbers to end of Queue
        Q.add(7855642);
        Q.add(35658786);
        Q.add(5278367);
        Q.add(74381793);

        // print queue
        System.out.println("Queue: " + Q);

        // print head
        System.out.println("Queue's head: " + Q.element());

        Q.clear();

        // print queue
        System.out.println("Queue: " + Q);

        try {
            // Queue is empty now hence exception
            System.out.println("Queue's head: " + Q.element());
        }
        catch (Exception e) {
            System.out.println("Exception: " + e);
        }
    }
}

Output:

Queue: [7855642, 35658786, 5278367, 74381793]
Queue's head: 7855642
Queue: []
Exception: java.util.NoSuchElementException

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/Queue.html#element--

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