The Deque.peekLast() method is present in the Deque interface inside the java.util package. It is used to retrieve or fetch the last element of the given deque, but it does not remove the last element of the given deque. If the given deque is empty, then this method will return null.
Let’s view the syntax of the function.
Deque.PeekLast();
The Deque.peekLast() method doesn’t take any parameter.
The Deque.peekLast() method returns the last element of the deque, and it returns null if the deque is empty.
Let’s take a look at the below code snippet.
import java.util.*;class Solution3 {public static void main(String[] args) {Deque<Integer> dq= new ArrayDeque<>();dq.add(10);dq.add(20);dq.add(30);dq.add(40);dq.add(50);System.out.println("the elements of deque are:-\n"+dq);int ele= dq.peekLast();System.out.println("the first element of deque is:-\n"+ ele);System.out.println("deque after peekLast operation is:-\n"+ dq);}}
java.util.* package to include the Deque interface.Integer type and added elements 10,20,30,40,50 in that.deque.peekLast() and stored the returned element in the ele variable.peekLast() method.In this way, we can use the Deque.peekLast() method in Java.