Java ArrayDeque Class: addLast()Method

public void addLast(E e)

The addLast() method is used to insert a given element at the end of this deque.

Note: This method is equivalent to add(E).

Package: java.util

Java Platform: Java SE 8

Syntax: addLast(E e)

Parameters:

Return Value Type: void

Throws:

NullPointerException - if the specified element is null

Pictorial Presentation

Example: Java ArrayDeque Class: addLast() Method

import java.util.ArrayDeque;
import java.util.Deque;

public class Main {
   public static void main(String[] args) {
      
      // Create an empty array deque with an initial capacity 3
      Deque<Integer> deque = new ArrayDeque<Integer>(3);

      // Use add() method to add elements in the deque
      deque.add(10);
      deque.add(20);
      deque.add(30);

      // Use addLast() method to add 3 elements 
      // at the last of the deque and print all the elements
      deque.addLast(40);
       for (Integer n : deque) {
         System.out.println("Number = " + n);
       }
      deque.addLast(50);
      System.out.println();
       for (Integer n : deque) {
         System.out.println("Number = " + n);
       }
      deque.addLast(60);
      System.out.println();
       for (Integer n : deque) {
         System.out.println("Number = " + n);
      }
  }
}

Output:

Number = 10
Number = 20
Number = 30
Number = 40

Number = 10
Number = 20
Number = 30
Number = 40
Number = 50

Number = 10
Number = 20
Number = 30
Number = 40
Number = 50
Number = 60

Java Code Editor:

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