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AbstractQueue element() method in Java with examples

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The element() method of AbstractQueue retrieves, but does not remove, the head of this queue.


public E element()

Parameters: This method does not accept any parameters.

Returns: The method returns the head of the Queue.

Exception: The function throws an NoSuchElementException if the queue is empty.

Below programs illustrate element() method:

Program 1:


AbstractQueue1 contains : [10, 20, 30, 40, 50]
head : 10

Program 2:

// Java program to illustrate the
// AbstractQueue element() method
// NoSuchElementException
import java.util.*;
import java.util.concurrent.LinkedBlockingQueue;
public class GFG1 {
    public static void main(String[] argv)
        throws Exception
        try {
            // Creating object of AbstractQueue<Integer>
                AQ1 = new LinkedBlockingQueue<Integer>();
            System.out.println("AbstractQueue1 : " + AQ1.element());
        catch (Exception e) {
            System.out.println("Exception is" + e);


Exception isjava.util.NoSuchElementException


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Last Updated : 26 Nov, 2018
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