JavaScript vs. Java

Many novice developers have a misconception that Java and JavaScript are similar. These two languages are nothing alike except their names. In this write up we will discuss the differences and pros and cons of using Java and JavaScript.

What is JavaScript?

JavaScript is an object-based scripting language created at Netscape Communications Corporation by Brendan Eich in 1995. It is used to add interactive and dynamic designs to static HTML-based web applications. It was originally designed to only work in browsers, but with node.js, it can even be used for server-side development.

What is Java?

Java is a class-based, object-oriented programming language. James Gosling created it at Sun Microsystems. It was created with the motto write once, run anywhere. It can run on almost all platforms as it uses a virtual machine platform to run its compiled code.

Similarities between JavaScript and Java:

Both Java and JavaScript inherit their syntax from C and are used in web development. These are only a few similarities these languages have.

Differences between JavaScript and Java:

JavaScript Java
It is an object-based scripting/programming language that can run in any browser. It is an object-oriented programming language.
It needs environments like node.js to run outside of a browser. It uses its own virtual machine to run its code.
It is a dynamically typed language. It is a statically typed language.
It is more relaxed towards the syntax. Variables in Java must be declared and
Variables can be used without defining their types. The data types of variables must be defined before using them.
It checks data types at run time. It performs data type checks at compilation time.
It is an object-based scripting language where. It is a class-based programming language.
In Javascript, objects are based on prototypes. In Java, no program can be created without classes.
JavaScript is mostly combined with HTML and CSS to make a complete web application. Java can work as a stand-alone language. It doesn’t need to be integrated with other languages.
JavaScript files have .js extensions. Java files have .java extensions.
JavaScript is ideal for beginners and is very easy to learn. Java is complex and hard to learn.
JavaScript source code can run directly on a browser and does not need compiling as it is a scripting language. Java code needs to be compiled before it can run on a JVM (Java Virtual Machine).
It consumes less memory than Java. Java source code needs a lot more memory than JavaScript source code.


As you can see from the article, you can’t find many similarities between Java and JavaScript apart from their names. JavaScript is a scripting language for adding interactive elements to a web page, whereas Java is a high-level object-oriented programming language used for computer software development.

About the author

Shehroz Azam

A Javascript Developer & Linux enthusiast with 4 years of industrial experience and proven know-how to combine creative and usability viewpoints resulting in world-class web applications. I have experience working with Vue, React & Node.js & currently working on article writing and video creation.