Difference between Java and JavaScript

If you’re a computer user, you might have heard about Java and JavaScript. While most of the people assume that there is no difference between Java and JavaScript, in reality they are totally different from each other. Many beginner programmers often get confused and mix up both Java & JavaScript. However, it is important to note the evolution of both of these languages took a totally different path. Are you reading this article to get your doubt clear? If yes, it is time to compare both of these languages and know what exactly makes these two similar looking languages differ from each other.


One of the key differences between both of these languages is that Java is a programming language, which is based on the C language. It derives most of its syntax from C and C++ language. Java can stand on its own while JavaScript must be used in consort with the HTML (Hyper Text Markup) document to function appropriately.

Java was created first before JavaScript, which means Java was an inspiration behind the creation of JavaScript.


On the other hand, JavaScript is nothing but an interpreted programming language; it is a scripting language that is dynamic and weakly typed with a whole host of first class functions. It is created by Netscape and it can’t create stand alone applications like Java, but resides on the internet browser. Most of the modern web browsers have inbuilt JavaScript. However, it is important to note that JavaScript based web pages can run only when you’ve JavaScript enabled within your web browser.

Okay, but what is the major difference between both of these programming languages apart from their concept? Let’s explore it!

What about browser and server compatibility?

When it comes to the browser compatibility, JavaScript runs on most of all the modern web browsers and that is the reason why most of all the websites leverage from it to enhance user experience. On the other hand, Java applets can also run in a browser, but it is struggling with the compatibility and security issues.

Well, Java is a clear winner here! Java has been a powerhouse for a wide range of web application servers, such as WebSphere, JBoss and Apache Tomcat. All the servers are extensively used by the web applications created for general and specific users. On the other hand, JavaScript is struggling to earn credit when it comes to server compatibility.

However, both of them can easily run on servers.

Complied or Interpreted?

Usually, Java application development code is written in an integrated development environment and compiled into a bytecode, which is not readable by humans and requires a JVM (Java Virtual Machine) to run it. On the other hand, JavaScript code is executed with the help of JavaScript engine in the same syntax in which it is written. However, all the JavaScript files that are sent over the internet are frequently compressed into a barely readable format to minimize the overall size of the file.

Moreover, you will require specialized software if you wish to make changes within the Java environment in order to compile and deploy the changes. On the other hand, you don’t need any specialized software or application to make changes in JavaScript!

In terms of code utilization

“Write once, Run anywhere” – This is the principle on which Java is built. It enables developers to write their code and deploy it on the operating system without making changes. Most of the time it works perfectly, but sometimes you may find some glitches in it based on the JVM and the code used.

On the other hand, JavaScript has a standard through ECMAScript, which means it is more likely to the differences in the execution environment. It would be quite a headache for the developers as they will have to write JavaScript code for the different environment.

What about compilation and run?

Java code is complied before it runs, so it would be easy for the developers to find any structural problems within a code. However, JavaScript is not compiled in that way, which means all the bugs or errors would be executed at runtime.

Apart from all these, there are a lot of other differences between Java & JavaScript. However, we’ve tried to cover the most important differences from the development point of view. Do you know more differences? Share your opinions and views in the comment section…!

About Mohammed Anzil

Professional Blogger, SEO, and Web Developer. Founder of SocialPositives.com and CoFounder of AndroidConnections.com.

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