Java Deque push() Method

The push() method of Deque interface is used to push an element on the stack represented by the given deque. The above method is equivalent to addFirst() method.

Syntax:

Parameter:

The above requires only one parameter:

The element 'e' that needs to be pushed.

Throw:

IlleagalStateException- If the element is not able to be added due to capacity restriction.
NullPointerException- If the specified element is already null and the given deque does not allow the null elements.
IlleagalArgumentException- If some properties of the specified element prevent it from being added to the deque.

Example 1

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequepushExample1 {
    public static void main(String[] args) {
		Deque<Character> deque = new ArrayDeque<>();
	    deque.push('d');
	    deque.push('c');
	    deque.push('b');
	    deque.push('a');
	  System.out.println("The final deque is given as : ");   
	  for (Character character : deque) {
		System.out.println(character);
	}
   }
}

Test it Now

Output:

The final deque is given as : 
a
b
c
d

Example 2

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequepushExample2 {
    public static void main(String[] args) {
    	Deque<String> deque = new ArrayDeque<>();
		deque.push("World");
		deque.push(" ");
		deque.push("Hello");
		
		System.out.println("The final deque is : "+deque);
	}
}

Test it Now

Output:

The final deque is : [Hello,  , World]

Example 3

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequepushExample3 {
   public static void main(String[] args) {
	Deque<Integer> deque = new ArrayDeque<>();
	deque.push(55);
	deque.push(65);
	deque.push(75);
	deque.push(85);
	System.out.println("The resultant deque is represented as : ");
	for (Integer integer : deque) {
		System.out.println(integer);
	}  
   }
}

Test it Now

Output:

The resultant deque is represented as : 
85
75
65
55

Next TopicJava Deque

← prev next →

Latest Courses

We provides tutorials and interview questions of all technology like java tutorial, android, java frameworks

Contact info

G-13, 2nd Floor, Sec-3, Noida, UP, 201301, India

[email protected].

Python

AI, ML and Data Science

Java

B.Tech and MCA

Web Technology

Software Testing

Technical Interview

Java Interview

Web Interview

Database Interview

Company Interviews

Java Tutorial

Control Statements

Java Object Class

Java Inheritance

Java Polymorphism

Java Abstraction

Java Encapsulation

Java Array

Java OOPs Misc

Java String

Java String Methods

Java Regex

Exception Handling

Java Inner Class

Java Multithreading

Java Synchronization

Java Networking

Java Applet

Java Reflection

Java Conversion

Java JDBC

RMI

Internationalization

Java Array Class

Java AtomicInteger Class

Java AtomicLong Methods

Java Authenticator

Java BigDecimal class

Big Integer Class

Java Boolean class

Java Byte Class

Java Class

Java Collections class

Java Compiler Class

CopyOnWriteArrayList

Java Math Methods

LinkedBlockingDeque

Java Long class

LinkedTransferQueue

Java List

Java MulticastSocket

Java Number Class

Java Phaser Class

ArrayList Methods

Java Thread Methods

Java Projects

Java Programs

Java Misc

Java Date Class

Java ListIterator Class

Java NIO Tutorial

HttpURLConnection

Java Deque

Java HttpCookie Class

Java URL class

Java List Methods

Java Vector class

Java Collection Methods

Java Socket Class

Java Executors

Java Deque push() Method

Syntax:

Parameter:

Throw:

Example 1

Example 2

Example 3

Latest Courses

Contact info