ArrayDeque addLast() Method in Java
The java.util.ArrayDeque.addLast(Object element) method in Java is used to insert a specific element at the end of this deque. It is similar to the add() method in Java. Syntax:
Array_Deque.addLast(Object element)
Parameters: The parameter element is of the type ArrayDeque and refers to the element to be added. Return Value: The function does not return any value. Exceptions: The method throws NullPointerException if the passed parameter is NULL.
The Time Complexity of this addLast(Object element) is O(1) i.e Constant.
Below programs illustrate the Java.util.ArrayDeque.addLast() method:
Program 1: Adding Integers to the Deque.
Java
// Java code to illustrate addLast() import java.util.*; public class ArrayDequeDemo { public static void main(String args[]) { // Creating an empty ArrayDeque Deque<Integer> de_que = new ArrayDeque<Integer>(); // Use add() method to add elements into the Deque de_que.add( 10 ); de_que.add( 15 ); de_que.add( 30 ); de_que.add( 20 ); de_que.add( 5 ); // Displaying the ArrayDeque System.out.println( "ArrayDeque: " + de_que); // Adding elements at the end de_que.addLast( 40 ); de_que.addLast( 50 ); de_que.addLast( 60 ); de_que.addLast( 70 ); // Displaying the ArrayDeque System.out.println( "ArrayDeque_end_addition: " + de_que); } } |
Output:
ArrayDeque: [10, 15, 30, 20, 5] ArrayDeque_end_addition: [10, 15, 30, 20, 5, 40, 50, 60, 70]
Program 2: Adding String to the Deque.
Java
// Java code to illustrate addLast() import java.util.*; public class ArrayDequeDemo { public static void main(String args[]) { // Creating an empty ArrayDeque Deque<String> de_que = new ArrayDeque<String>(); // Use add() method to add elements into the Deque de_que.add( "Welcome" ); de_que.add( "To" ); de_que.add( "Beginner" ); de_que.add( "4" ); de_que.add( "Beginner" ); // Displaying the ArrayDeque System.out.println( "ArrayDeque: " + de_que); // Adding elements at end de_que.addLast( "GFG" ); de_que.addLast( "World" ); de_que.addLast( "Hello" ); // Displaying the ArrayDeque System.out.println( "ArrayDeque_end_addition: " + de_que); } } |
Output:
ArrayDeque: [Welcome, To, Beginner, 4, Beginner] ArrayDeque_end_addition: [Welcome, To, Beginner, 4, Beginner, GFG, World, Hello]