Difference between Java and JavaScript

An overview of the differences between Java and JavaScript, from their origins to their current uses and functions.

Many newbies to coding may mistakenly believe that the programming languages Java and JavaScript are interchangeable, if not identical. Despite their similar caffeinated names (indeed, coffee was the inspiration), the distinction between Java and JavaScript is what distinguishes them. Separate applications that can be utilized interchangeably are quite unusual. So, what exactly is the difference between Java and JavaScript, what are they, how do they work, and which is better?

What is Java?

In the early 1990s, James Gosling considered names like Oak, DNA, Silk, and Green for his newly created object-oriented programming language, but he opted on Java, which is called after the Indonesian coffee. Gosling, a Canadian computer scientist at Sun Microsystems (now Oracle), co-created Java with Mike Sheridan and Patrick Noughton in 1991 and released it to the public four years later.

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It is now with Android apps, Hadoop, web server applications, enterprise desktop applications, retail, and finance all making use of it. As a result, it’s no surprise that it’s constantly it is the most popular (and frequently lucrative) programming language.

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For Android, corporate, and desktop apps, this is the gold standard. The basic foundation of Android app development was Java. With Java comes a large developer community, as well as any and all tools and frameworks that an application would require.
Performance and speed. One of the benefits of being a compiled language is that Java runs very quickly.

Cross-platform mobility. The Java Virtual Machine (JVM) allows Java applications to run on any OS or device that has the JVM installed.

Of course, there are several factors that may make you doubt that Java is the best choice for you. Java does necessitate a lot of available memory, and because of its ubiquity and endurance, hackers have had a lot of practice exploiting its flaws. 

What is JavaScript?

JavaScript is a programming language that allows web pages to become interactive and dynamic by running in a web browser. Despite the evident similarities in their names, JavaScript is not created by the same team or firm that created Java — but the name was obviously not by the then-new Java.

Web sites, on the other hand, could only display static graphics and text back then, with no capacity for dynamic activity once the page had loaded. This prompted the creation of a new web-specific scripting language, a “glue language” for designers and programmers. And it would be much better if it could use a syntax that is akin to the increasingly popular Java. JavaScript was born from that language.

JavaScript’s advantages as the scripting language of choice for creating interactive webpages include:

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The web’s core technology. Because JavaScript is such a big, omnipresent aspect of the Internet. you’ll find it easy to use for practically any web-based project, thanks to a slew of libraries and tools for web development, as well as an active developer community.

Despite the fact that its simplicity and single-threaded nature can enable it to fail in situations where newer, ultimate JavaScript is still the greatest at what it was for.

With Node.js, you can now work outside of the web. What was once a totally web-only scripting language can now be accessed on the front and back end thanks to the release of Node.js in 2009.

It is simple to learn. This is a feature that both Java and JavaScript share, especially since they both use a basic syntax. JavaScript will be one of the first programming languages that many people learn.

Major Differences between Java and JavaScript

  • Compiled or Interpreted: Compilation vs. Interpretation JavaScript is an interpreted scripting language, whereas Java is a compiled programming language. What’s the difference between the two? It’s all about how you put it together. JavaScript’s syntax is directly by a web browser, unlike Java, which is built into bytecode and executes on a Java Virtual Machine (JVM).
  • Type checking: like most programming languages, uses dynamic typing to ensure type safety at runtime. Java, on the other hand, employs static typing, which checks the type of a variable at build time. What’s the difference between the two? Static languages may need the programmer to explicitly designate a data type when creating a piece of data. This is not necessary for dynamic type checking, which provides more flexibility and allows you to develop code faster while simultaneously increasing the likelihood of errors.
  • Concurrency- It is to handling the execution of several instruction sequences at the same time (or concurrently). The two systems handle this extremely differently. Java uses several threads to do operations in simultaneously, whereas JavaScript was built to be single-thread from the start. JavaScript now handles concurrency on one main thread of execution with a queue system that is the event loop and a forking system called Node Clustering. As it is more commonly as Node.js for server-side applications.
  • Speed- Trying to determine which of Java and JavaScript is faster is challenging and possibly flawed on a fundamental level.  JavaScript, on the other hand, due to its nature as an interpreted language, allows for a faster start-up time than Java. In the end, you’re gaining and losing speed at different stages of the process, and it’s probably a wash.
  • Security- They  have been around for a long time. Providing lots of opportunities for hackers and security professionals to figure out where each language’s flaws are. SQL injections and XML external entities (XEE) are the major security concerns with Java. Whereas JavaScript users should be more concerned with cross-site scripting (XSS) attacks. And JavaScript or Node.js code injections into online forms and other page features.


Since the development of Java and JavaScript, programming has become much more sophisticated, if not convoluted, and there may be a specific detail to your programming plans that isn’t included in this summary of the main distinctions. These best practices are merely meant to serve as a starting point, giving you an idea of what to expect when deciding which of these two famous coding languages will best fit your specific or case-by-case programming requirements.