Related Articles

Related Articles

ArrayDeque push() Method in Java
  • Last Updated : 10 Dec, 2018

The Java.util.ArrayDeque.push(E element) method is used to push an element into the Deque. The operation is similar to the operation in the stack. The element gets pushed onto the top of the deque.

Syntax:

Array_Deque.push(E element)

Parameters: The parameter element is of the type ArrayDeque and refers to the element to be pushed into the deque.

Return Value: The method does not return any value.

Exceptions: The method throws NullPointerException if the passed parameter is NULL.



Below programs illustrate the Java.util.ArrayDeque.push() method:
Program 1: Adding String elements into the Deque.

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to illustrate push()
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 initial ArrayDeque
        System.out.println("Initial Deque: " + de_que);
  
        // Pushing elements into the deque
        de_que.push("Hello");
        de_que.push("World");
  
        // Displaying the final ArrayDeque
        System.out.println("Final Deque: " + de_que);
    }
}

chevron_right


Output:

Initial Deque: [Welcome, To, Geeks, 4, Geeks]
Final Deque: [World, Hello, Welcome, To, Geeks, 4, Geeks]

Program 2: Adding Integer elements into the Deque.

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to illustrate push()
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 initial ArrayDeque
        System.out.println("Initial Deque: " + de_que);
  
        // Pushing elements into the deque
        de_que.push(1254);
        de_que.push(4521);
  
        // Displaying the final ArrayDeque
        System.out.println("Final Deque: " + de_que);
    }
}

chevron_right


Output:

Initial Deque: [10, 15, 30, 20, 5]
Final Deque: [4521, 1254, 10, 15, 30, 20, 5]

Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready.




My Personal Notes arrow_drop_up
Recommended Articles
Page :