The getLast method is used to get the last element of the ArrayDeque object without deleting the item itself.
An
ArrayDeque(Array Double Ended Queue) is a growable array that allows us to add or remove an element from both the front and back. This class is the implementation class of theDequeinterface.ArrayDequecan be used as a stack or queue.Nullelements are prohibited.
public E getLast()
This method doesn’t take any parameters.
The getLast method retrieves the last element of the deque object. If the dequeu is empty then the NoSuchElementException exception is thrown.
This method is similar to the
peekLastmethod except that thegetLastmethod throws theNoSuchElementExceptionif thedequeis empty whereas thepeekLastmethod returnsnull.
The code below demonstrates how to use the getLast method.
import java.util.ArrayDeque;class GetLast {public static void main( String args[] ) {ArrayDeque<String> arrayDeque = new ArrayDeque<>();arrayDeque.add("1");arrayDeque.add("2");arrayDeque.add("3");System.out.println("The arrayDeque is " + arrayDeque);System.out.println("arrayDeque.getLast() returns : " + arrayDeque.getLast());}}
In the code above:
In line 1: We import the ArrayDeque class.
In line 4: We create an ArrayDeque
object with the name arrayDeque.
From lines 5 to 7: We use the add() method of the arrayDeque object to add three elements ("1","2","3") to dequeu.
In line 10: We use the getLast() method of the arrayDeque object to get the last element of the deque. In our case, 3 is returned.