Java vs JavaScript: What's the Difference, and Which to Use?

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By Faraz -

Despite the popularity of each, many people tend to mix up Java and JavaScript. If you're not sure which one to pick, read this article and find out everything you need to know about these two languages!

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Java and JavaScript are two of the most popular programming languages in the world. They share many similarities, but there are also key differences that should be considered when choosing which to use. In this blog, we will explore the key differences between Java and JavaScript, and explain which is best for which scenarios.

What is Java?

Java is a versatile language that can be used for a wide range of applications, from desktop applications to web applications. Java is platform-independent, meaning it can run on Windows, MacOS, and Linux. Java also has a large ecosystem of libraries and tools available, making it easy to get started programming.

Some features of Java:

  1. Java is cross-platform: Java can be used to create Windows, Mac, and Linux applications.
  2. Java is fast: Java code is compiled into efficient bytecode, which makes it run quickly on computers.
  3. Java has a large ecosystem: Java has a large community of developers, making it easy to find resources and collaborate with others.
  4. Java has a robust Standard Library: The Standard Library provides a rich set of tools and functions that can be used in many applications.
  5. Java is portable: Java code can be ported easily from one platform to another, making it an ideal language for cross-platform development.

What Is JavaScript?

JavaScript is a programming language that enables developers to create interactive web pages and applications. JavaScript was created in 1995 by Brendan Eich, who also created the popular web browser Firefox.

JavaScript is based on the ECMAScript standard, which is an international standard for scripting languages. ECMScript 3 was ratified in 2003, and ECMAScript 5 was ratified in 2009. JavaScript has become increasingly popular as a development language because it’s simple to learn and use, it runs on most browsers, and it’s versatile enough to be used in a variety of applications.

Some features of JavaScript:

  1. Variadic functions: JavaScript allows functions to take any number of arguments, which can be helpful when you need to pass large or complex data structures.
  2. Objects: JavaScript objects enable you to represent collections of data in a single place. You can access properties and methods of an object easily using dot notation.
  3. The function keyword: The function keyword lets you define a block of code that will be executed each time the script is run. This enables you to perform common tasks, such as handling errors, in a single place.
  4. Debugging tools: JavaScript has built-in debugging tools that help developers track down issues with their scripts. These tools include console logs, variable inspection, and memory tracking.

What is the Difference Between Java and JavaScript?

Here are some key differences between Java and JavaScript:

  • Java was created by Sun Microsystems, while JavaScript was created by Netscape.
  • Java is a compiled language while JavaScript is an interpreted language. This means that Java is translated into code before it runs on a computer, while JavaScript is run directly on the web browser.
  • Java has a larger user base, with over 100 million developers worldwide.
  • Java is more Robust and Secure than JavaScript, due to its built-in security features.
  • Java also has a larger library of built-in functions and classes than JavaScript.
  • Java is built on top of the Java Virtual Machine (JVM), so it can run on a variety of platforms, including Windows, macOS, and Linux. JavaScript is not as platform-agnostic, but it can be used with any web browser.

Pros and Cons for each language

JavaScript is a powerful programming language that has many pros and cons. Here are some of the benefits and drawbacks of using JavaScript:


  • JavaScript is easy to learn and can be used in a variety of web development projects.
  • It's compatible with many browsers, making it a popular choice for web developers.
  • JavaScript can be used to create sophisticated user interfaces and interactivity.
  • It's an open source language, which means that it's free to use and modify.


  • JavaScript can be slow to execute in certain circumstances.
  • Some browsers don't support all the features of JavaScript, so developers may need to use alternate languages or frameworks when working with this language.

Here are some pros and cons of Java.


  • Java is a well-established language with a large user base.
  • Java syntax is easy to learn for first-time programmers.
  • Java code can run on many different platforms, including Windows, Mac, and Linux.
  • Java can be used in web applications, Android apps, and desktop applications.
  • Java APIs (application programming interfaces) are well documented and reliable.


  • Java is not as widely used as some other languages, such as Python or Ruby.
  • Java code can be slow to execute due to its compiled nature.
  • Java does not have an active community of developers like Python or Ruby does.

Which language should you use?

There isn't a definitive answer to this question since each language has its own advantages and disadvantages. Ultimately, it depends on what you are looking to achieve with your project. If you are targeting a specific platform or device, then Java might be a better option since it is more widespread. Alternatively, if you want to write code that can be used on any platform, then JavaScript might be the better choice.


Java and JavaScript are both powerful programming languages, but they have some key differences that can affect the way you code. If you’re new to programming or just want to get a better understanding of what each language is good for, read on!

That’s a wrap!

I hope you enjoyed this article

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