Java vs JavaScript: Difference between Java and JavaScript

Java vs JavaScript: Difference between Java and JavaScript

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Updated on Nov 8, 2023 18:04 IST

Java and JavaScript are one of the two most popular programming languages that are used by developers around the globe.
In this article, we will discuss the difference between two these two programming languages.

Java and JavaScript are the most popular programming languages in the development industry. As they both have ‘Java’ in their names, one may think they are related. But they are very different. Both languages are written and executed differently and are used for a variety of different tasks. In this article, we will understand the difference between Java and JavaScript. Before diving into the differences, let us understand these programming languages.

Must Check: Free Java Online Course and Certifications

Must Check: Free JavaScript Online Courses and Certifications

Table of Content

Difference Between Java and JavaScript – Java vs JavaScript

Below are the main differences between Java and JavaScript:

Java JavaScript
Java is an object-oriented programming language JavaScript is a scripting language with multiple paradigms
It is strongly types – requires programmers to specify the type of a variable before compilation It is weakly typed – the type of the variable is unknown till the compilation
Its extension is .java The extension of JavaScript is .js
In Java, objects of Java are class-based Objects are prototype-based
Compiled and interpreted Strictly interpreted
Java runs on any virtual machine(JVM) or browser JavaScript runs on a web browser
Thread-based approach Event-based approach
Java supports multithreading JavaScript does not support multithreading
It does not support closures It supports closures
Java has a thread-based approach to concurrency It has an event-based approach to concurrency.

What is JAVA?

Java was introduced in 1995 at SunWorld (now the subsidiary of Oracle). It was created by James Gosling and Patrick Naughton at Sun Microsystems.

Java is an object-oriented, statically typed programming language. Most of its syntax is derived from the C and C++ programming languages. Java has a rigid syntax for declaring variables. It requires the programmer to specify the Java data types that will be stored in a specific variable. Java is a class-based language. Classes act as reusable templates to produce objects, where objects are data structures that store information.

Java needs to be compiled. It must pass through the JVM (Java Virtual Machine) to be interpreted by the machine later. JVM allows Java to convert byte-code into any machine code. The byte-code is an intermediate code translated from the source code. The written code of the Java application when compiled runs on several operating systems including Windows, Linux, and Mac. It supports object-oriented programming concepts such as inheritance, encapsulation, and abstraction.

It is a fast, secure, robust, and reliable language and is used for developing Java applications for laptops, game consoles, data centers, scientific supercomputers, mobiles, and more.

Explore popular Java Courses

Also Read: Wrapper Class in Java

Also Read: Java Methods Explained (with Code)

Java Program to Print Hello, World!


 
class HelloWorld
{
public static void main(String args[])
{
System.out.println("Hello, World!");
}
}
Copy code

Must Check: Top Java Interview Questions and Answers

Also Read: Linear Search Algorithm (with Code)

Also Read: Multithreading in Java

Features of Java

  • Simple syntax
  • Easy to learn
  • Robust – capable of eliminating errors
  • Object-oriented – follows OOPs concepts
  • Dynamic – supports dynamic loading of classes
  • Platform Independent – runs on any platform with JREs (Java Runtime Environment)
  • Architecture Neutral – no implementation-dependent features
  • Secure – helps develop virus-free systems
  • Multithreading – allows programmers to write a program to do many tasks simultaneously.
  • Portable – enables you to carry the Java bytecode to any platform
  • High Performance – allows high performance with the just-in-time compiler
  • Supports WORA (Write once Run Anywhere)

Related Reads: Features of JAVA

Applications of Java

To learn more about Java, read our post – What is Java?

What is JavaScript?

JavaScript was developed in 1995 by Brendan Eich. It was created for Netscape 2. In 1997, it became the ECMA-262 standard.

JavaScript (JS) is a dynamically typed programming language (or scripting language). Compared to Java, JavaScript has a less rigid syntax around declaring variables. It does not require the programmer to specify the JavaScript data type that will be stored in a variable. You also don’t need to add classes or functions.

It is interpreted during run time into the machine code and is used for creating interactive web pages. It enhances the user experience of the web page by converting them from static to interactive. The search box on Flipkart and the refresh feature of Instagram are examples of JavaScript.

Javascript follows the rules of client-side or front-end programming. This enables it to run in the user’s web browser without any resources from the webserver. With the introduction to Node.JavaScript (Node.js), it can be used for server-side or backend development as well.

Check out the best JavaScript Courses

JavaScript Program to Print Hello, World!

There are three ways to print ‘Hello, World!’ in JavaScript:

  • log()
  • alert
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