ArrayDeque add() Method in Java (original) (raw)

Last Updated : 10 Dec, 2018

The Java.util.ArrayDeque.add(Object element) method in Java is used to add a specific element at the end of the Deque. The function is similar to the addLast() method of ArrayDeque in Java.Syntax:

Array_Deque.add(Object element)

Parameters: The parameter element is of the type ArrayDeque and refers to the element to be added to the Deque.Return Value: The function returns True if the element is successfully added into the deque else it returns false.Exceptions: The method throws NullPointerException if the passed parameter is NULL. Below programs illustrate the Java.util.ArrayDeque.add() method:Program 1: Adding String elements into the Deque.

Java `

// Java code to illustrate add() import java.util.*;

public class ArrayDequeDemo { public static void main(String args[]) { // Creating an empty ArrayDeque Deque de_que = new ArrayDeque();

    // Use add() method to add elements into the Deque
    de_que.add("Welcome");
    de_que.add("To");
    de_que.add("Geeks");
    de_que.add("4");
    de_que.add("Geeks");

    // Displaying the ArrayDeque
    System.out.println("ArrayDeque: " + de_que);
}

}

`

Output:

ArrayDeque: [Welcome, To, Geeks, 4, Geeks]

Program 2: Adding Integer elements into the Deque.

Java `

// Java code to illustrate add() import java.util.*;

public class ArrayDequeDemo { public static void main(String args[]) { // Creating an empty ArrayDeque Deque de_que = new ArrayDeque();

    // 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);
}

}

`

Output:

ArrayDeque: [10, 15, 30, 20, 5]