Java Deque peekLast() Method

The peekLast() method of Java Deque Interface retrieves and not remove the last element of the given deque. But, if the deque is empty, it may return null.

Syntax:

Parameter:

Return:

The above method is used to return the tail of the given deque. On the other hand, if the deque is empty, the method may return null.

Example 1

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequepeekLastExample1 {
  public static void main(String[] args) {
	  Deque<Character> deque = new ArrayDeque<>();
	  deque.offer('J');
	  deque.offer('A');
	  deque.offer('V');
	  deque.offer('A');
	  Character val = deque.peekLast();
   System.out.println("The last character is given as : "+val);   
   System.out.println("The final deque is given as : ");   
	for (Character character : deque) {
		System.out.println(character);
    	}
     }
  }   

Test it Now

Output:

The last character is given as : A
The final deque is given as : 
J
A
V
A

Example 2

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequepeekLastExample2 {
   public static void main(String[] args) {
	   Deque<String> deque = new ArrayDeque<>();
		  deque.offer("Java");
		  deque.offer("is");
		  deque.offer("a");
		  deque.offer("secured");
		  deque.offer("language");
		  String val = deque.peekLast();
		System.out.println("The last string value is given as : "+val);			    
		System.out.println("The final deque is given as : "+deque);    
	     }
	  }   

Test it Now

Output:

The last string value is given as : language
The final deque is given as : [Java, is, a, secured, language]

Example 3

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequepeekLastExample3 {
   public static void main(String[] args) {
	   Deque<Integer> deque = new ArrayDeque<>();
		  deque.offer(1);
		  deque.offer(2);
		  deque.offer(3);
		  deque.offer(4);
		  deque.offer(5);
		  int val = deque.peekLast();
		System.out.println("The last integer value is given as : "+val); 
		System.out.println("The final deque is given as : ");
		for (Integer integer : deque) {
			System.out.println(integer);
	     	}
	     }
	  }  

Test it Now

Output:

The last integer value is given as : 5
The final deque is given as : 
1
2
3
4
5

Next TopicJava Deque

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