Java vs JavaScript: Differences You Should Know

Java vs JavaScript Difference You Should Know


Java vs JavaScript

The ultimate comparison and difference between Java and JavaScript explained in detail

The word “Java” appears in both Java and Javascript, which, however similar they may appear to the human ear, are quite different. Creating online and mobile applications is one of the many uses for Java and Javascript, but there are some very significant differences between the two languages. This post explores the differences and similarities between Java and Javascript.

In this article, we have explained in detail the differences between Java and JavaScript.

What is Java?

Java is a general-purpose, class-based, object-oriented programming language that aims to have as few implementation dependencies as possible. Originally written by James Gosling at Sun Microsystems and published in 1995. Web development and mobile application development are two of Java’s most popular applications, but there are many other uses. Additionally, it is used in desktop, embedded, and scientific applications. In addition to devices such as PCs, smartphones, printers, ATMs and home security systems, Java is supported by 3 billion devices worldwide.

What is JavaScript?

JavaScript, or JS for short, is a multi-paradigm, high-level, just-in-time compiled programming language that conforms to the ECMAScript specification. Braces syntax, dynamic typing, prototype-based object orientation, and first-class functions are all part of it. JS contributes to the core technology of the World Wide Web and is used by many websites for client-side page behavior. As a language with multiple paradigms. For creating interactive web pages, JS supports and enables event-driven, functional, and imperative programming styles. Provides APIs for working with text, regular expressions, dates, data structures, and the Document Object Model (DOM).

Differences between Java and Javascript

Let’s see the difference between Java and JavaScript.

programming paradigm

The main difference between the two languages ​​is the programming paradigm, or how programming languages ​​approach solving problems. Java is an object-oriented programming (OOP) language. However, JS is a multi-paradigm language that can be used as an OOP, procedural, or scripting language.

type checking

Type checking verifies the “type” of a variable. JS is a dynamically typed language. That is, the variable type is unknown until the program is compiled. Conversely, Java is a statically typed language, so each variable must be associated with a type when declared.


Inheritance is a concept that allows one entity to inherit or derive the properties of another entity. A Java class can derive properties of another class. Multiple inheritance is also possible. That is, a class can derive properties from multiple classes.

JS is based on the concept of prototypes and does not support multiple inheritance.

function overloading

A programming language can define two or more functions with the same name to perform different tasks using function overloading. Functions, on the other hand, depend on their arguments. Java allows function overloading, but JS does not.


Multithreading reduces execution time by using CPU power to execute multiple parts of a program simultaneously. The interpreter in the browser is single-threaded, so Java supports multi-threading, but JS does not.


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