ArrayDeque add() Method in Java
Last Updated :
10 Dec, 2018
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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:
Java
Java
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 code to illustrate add()
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("Geeks");
de_que.add("4");
de_que.add("Geeks");
// Displaying the ArrayDeque
System.out.println("ArrayDeque: " + de_que);
}
}
Output:
Program 2: Adding Integer elements into the Deque.
ArrayDeque: [Welcome, To, Geeks, 4, Geeks]
// Java code to illustrate add()
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);
}
}
Output:
ArrayDeque: [10, 15, 30, 20, 5]
