Top 7 difference between Java and JavaScript| Java vs JavaScript


Java is the most popular programming languages and these days JavaScript is also gaining popularity. Different apps are built-in JavaScript these days. In this blog, I will the main differences between Java and JavaScript.

What is Java?

The multi-platform, object-oriented, and network-centric, the programming language is called Java. It is a commonly used programming language. It was first released by Sun Microsystem in 1995. And later on, was acquired by Oracle Corporation. It follows the principle of WORA(Write once run anywhere).

Also Read- Java vs Python: Top 23 differences between Java and Python

What is JavaScript?

JavaScript is a considered as lightweight programming aka scripting language With JavaScript, you can create interactive web pages.  JavaScript tends to insert dynamic text into HTML. It follows the rules of client-side programming, so it runs in the user’s web browser without the need for any resources form the webserver.

You can also use JavaScript with other technologies like REST APIs, XML, and more. Nowadays JavaScript also using technologies like Node js. It is considered as a cross-platform language.

Also Read- Top 7 Programming Languages to learn in 2020

Difference between Java and JavaScript 

Key Points



Language type Java is the object-oriented language JavaScript is the object scripting language
Extension Here .java extension is used Here .js extension is used
Variable Definition Java is a strongly typed language, so the variable should be declared first before using it in the program.


JavaScript is a weakly typed language, so its variable can be declared where they are used.
Static Dynamic
  • Great libraries
  • Widely used
  • Excellent tooling


  • Can be used on frontend/backend
  • It’s everywhere
  • Lots of great frameworks


Declaration Here declaration of data type is done Here declaration is not done
objects Objects are class-based Objects are prototyped based.

Key differences Java vs JavaScript

  • Java is a strongly typed language while JavaScript is a weakly typed language.
  • Java has a file extension “.Java,” whereas Javascript has the file extension “.js”
  • Java is compiled on the server before execution on the client while JavaScript is interpreted by the client.
  • With Java, you follow the WORA principle that writes code once and runs it on almost any computing platform whereas in, Java script is a cross-platform language.
  • Java code must be compiled whereas  JavaScript code is all-text.
  • JavaScript code is run on a browser only, while Java creates applications that execute in a VM or browser.
  • Java is a multi-platform, object-oriented, and network-centric, programming language whereas JavaScript is a scripting language that helps you create interactive web pages.
  • Java is a static language while JavaScript is a dynamic language.

Final thoughts

In this article, I have discussed the differences between Java and JavaScript. I hope this works for you. If you are still facing issues, kindly ask in the comment section.


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