Java vs JavaScript

Java vs JavaScript: Most Important Comparison You Should Know

Java vs JavaScript raises many questions. Are they equivalent? Is JavaScript an extended part of Java? Are they completely different? Can I combine the code? What should I learn first? What is suitable for the Startup web app? I have explained the following information which will answer all the questions.

Java vs JavaScript

New programmers and non-technical people confused between Java and JavaScript because of the common word of “Java.”. Each programming language used in its opinion and each has strengths over the other. One isn’t significantly better than the other; Programmers use both Java and JavaScript for various functions.

Java and JavaScript are written, assembled, executed, and even greatly different in the ability of both languages. Java is use in a wide range of server-side development while JavaScript is best suit for developing client-side scripts for tasks such as interactivity and validation.

There are some more important differences that you will see further in this article.

What is Java?

Java is an OOPs (Object-Oriented Programming) language. A team of Sun Microsystem engineers called the “Green Team” create Java in 1991. It was first released in 1995, and since then several new versions have been launched.

Programs developed in Java will be execute in a JVM (Java virtual machine) by which we can run the same program on multiple platforms. Many of the applications that make day-to-day living easier because of Java.

Java vs JavaScript: How is Java used in the real world?

Android app

Java is the standard language of Android app development, which means the fastest performance and most native experience.

Java is the standard language of Android app development, which means the fastest performance and most native experience.

Desktop Apps

Java is probably the easiest way to create cross-platform software these days. The Swing UI toolkit used to be an alternative to Java developers, but if you’re starting now, skip it and learn JavaFX or SWF instead.

Enterprise systems

High-volume data processing industries (such as banking, financial trading, etc.) use Java for non-legacy systems, because it is fast, portable, easy to maintain, and are less prone to types of catastrophic bugs in low-level languages.

Embedded Systems

Some areas of embedded space now depend on Java. Examples of embedded systems include digital watch, factory controller, traffic lights, microcontrollers, hybrid vehicles, and more recently, Internet of Things devices.

Scientific research

Java is mostly use for complex tasks like natural language processing and artificial intelligence. Data processing, computing, modeling, and simulations are often carried out in languages such as MATLAB and Python.

Example of Java Code

The syntax of Java is mostly determine by C++. So, if you’ve written in C++ in the past, you’ll probably see some similarities between the syntax of each language. As the Java code resembles, below is an example of a simple Hello World app written in Java.

class HelloWorldApp {

public static void main(String[] args) {

 System.out.println(“Hello World!”);



What is JavaScript?

JavaScript is a scripting programming language. It is use to make interactive Web pages . It can include dynamic text into HTML. JavaScript is also know as the browser language.

With HTML and CSS, JavaScript (standardized as ECMAScript) is consider one of the largest three major components of the web. JavaScript is a scripting language that usually runs in a browser and makes web pages dynamic and interactive. Today JavaScript is also quickly growing as a server-side technology since the release of Node.js.

JavaScript was born out of the vast boundaries of HTML. When Netscape Communications predicted the need for a more dynamic web, they created a new language that could be written right within HTML. This language, which was launched by the name LiveScript, was prototyped in just 10 days.

LiveScript and Java were complementary to each other, hence the rename to JavaScript and why the two languages have similar syntax. But as far as similarities go. Java never took the web, and the two languages participated differently. With HTML and CSS, JavaScript is one of the three main pillars of web development.

Java vs JavaScript: How is JavaScript used in the real world?

Web Applications

JavaScript can be use for both front-end and back-end web development. The back-end server-side logic (e.g. routing, data handling, database interaction) is left behind, while the front-end browser-side DOM-manipulation (e.g. animations, data insertions, asynchronous updates). Some JavaScript frameworks do both, which is called full-stack web development.

Desktop apps

JavaScript can be accessed from the web and packaged into standalone desktop software using frameworks such as Electron and NW.js (formerly Node-WebKit). This is done by bundled a JavaScript engine inside the executable, which interprets the HTML/CSS/JS within a standalone desktop window.

Mobile apps

Reactive native and PhoneGap framework create mobile apps using JavaScript. These frameworks come in two ways: those who transpile javascript into native code and who use the bundled JavaScript engine to render as an app.

Example of JavaScript code

Similar to the above, the code below shows that JavaScript is in a simple “Hello World How to reproduce. You will notice that JavaScript resides within the <html> and </html> elements, and starts with <script> and ends at the </script>.



        <p>Beginning text</p>


            alert(‘Hello, World!’)


        <p>End text</p>



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Java vs. JavaScript: Major Similarities

As they differ, there are some top-level similarities that are worth considering, especially if you’re looking at web development when comparing JavaScript with Java.

Object-Oriented Programming (OOP)

Both languages require the developer to code objects and their relationships in terms of each other. In detail, it gives both languages access to techniques such as inheritance, encapsulation, and polymorphism.

Front-End Development

Both languages can be use in front-end development aspects. JavaScript can be embed directly into HTML, implement as a framework or library; Java can be used as a Java applet.

Back-end development

Both languages can be use on the server-side. Java has long been use to power back-end technologies like Apache, JBOSS, and Websphere. Node.js has become a launchpad for JavaScript-powered servers.

Java vs JavaScript
Java vs JavaScript

Java vs JavaScript: Key Differences

Let’s look at some of the major differences between Java and JavaScript.

Compiled language vs. interpreted language

Java is a compiled language that runs on a virtual machine that is not readable by humans, while JavaScript code usually runs on the JavaScript engine in the same syntax that it is written.

Creating a program compiled in Java requires several steps. The compiled languages are convert directly to machine code, and as a result, they are faster than the interpreted languages. In Java programming, you need to make a change to the program while a program in JavaScript runs line-by-line and executes your commands quickly.

JavaScript is an interpreted language which was once known to be slower than Java. But over time, with the progress of compilation, the performance of JavaScript has improved remarkably.

Java vs JavaScript — Concurrency

Concurrency is handle in a very different way between Java and JavaScript.

The strength of the Java class Concurrency (java.lang.Thread) is that it allows developers to work with multiple threads that also help maintain parallel Concurrency.

While JavaScript runs on a single thread, it responds to events that occur during programming. JavaScript handles the queue system using a feature that is use to “Event Loop” Called, its features – heap, async/await, callbacks, event loop, and promises.

Java vs JavaScript – Class-based or prototype

Java is a class-based language. It follows a class-based relationship where all the properties mentioned in a class are inherited from the instance of that class. Whereas, JavaScript is a prototype language that inherits all objects directly from other objects of coding.

Java vs JavaScript – static or dynamic type checking

JavaScript is a scripting language that uses a dynamic form of coding and code protection verified at runtime. Java uses static type where variables are check at compile-time. In both languages, programmers need to specify the variable type like integer type, string type, double type, etc.

Java static type checking is helpful for programmers to find the type of error early in the application development. And, because this compiler knows what type of data is being use, they can code at a faster rate. Automate your JavaScript development process by hiring the industry’s best outsourcing developers.

The advantage of JavaScript dynamic type checking is that you are free to perform type tasks that improve the productivity of programmers.

Java vs JavaScript – Support Options

Oracle provides assistance to users who face problems with Java software. Users can use Oracle’s Premium Java SE support service to solve problems related to the Java platform, Java components, Java standard edition, etc.

When talking about Java vs JavaScript, we can’t ignore the fact that these two languages have some similarities.

Support for back-end development

Both languages can be use on the server-side and can support back-end development technologies such as Node.js, JBoss and Apache.

Support for front-end development

Both Java and JavaScript support front-end development and are easy to embed in HTML coding. Both languages provide access to techniques in coding such as coding, polymorphism, and inheritance.

Java vs JavaScript: What should you choose for your next project?

Practical differences between Java vs JavaScript are boiling down to two important metrics: app performance and development time.

If you want a mobile application exclusively for Android then you should go to Java. It is also best to build Java web and desktop apps that go for building server-side technologies like servers, enterprise-grade software, Big Data Analytics, Glass Side, JBoss, etc.

For web development, go with JavaScript. For computation-heavy software, go with Java. Both are viable for desktop and mobile software, but I recommend Java for large, complex apps due to cleaner debugging and codebase management. Otherwise, JavaScript.

You should consider JavaScript if your project requires single-page applications, server-side technologies such as MongoDB, Express.js, Node.js, React Native or Mobile App Development.

Java vs JavaScript: Conclusion

As we can see, there is a lot of difference between Java vs JavaScript. Both the languages are completely unrelated in terms of association and ownership. While they share some similarities, they are broad and differ very far. Both languages are extremely useful in their own way and the option to use each other will depend on the work at hand.

I hope you will have a clear picture of Java vs JavaScript. Without a doubt, learning these two languages will make Java and JavaScript programmers more productive and will also help build enterprise-grade web applications and develop Java software solutions.

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