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What are the Key Differences Between Java and JavaScript?

Published: 8th January, 2024
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Vibha Gupta

Technical Content Writer at almaBetter

Java and JavaScript are two programming languages that share some similarities but have significant differences. Read this blog and find out more!

Java and JavaScript are two programming languages that share some similarities but also have some significant differences. Despite the similarity in their names, these two languages serve different purposes and have distinct features that set them apart. 

In this blog post, we will explore the difference between Java and Javascript in tabular form, their respective applications, and the pros and cons of each language.

First, let’s start with a brief introduction to each language and understand Java vs Javascript which is better for future.

Java is an object-oriented programming language first released in 1995 by Sun Microsystems. It is a general-purpose language designed to be portable, platform-independent, and scalable. Java is commonly used to create large-scale enterprise applications like web, mobile, and desktop.

On the other hand, JavaScript is a scripting language first released in 1995 by Netscape Communications. It is primarily used for creating dynamic and interactive web pages and is often used alongside HTML and CSS. In addition, JavaScript is a client-side language, meaning it runs on the user’s computer rather than the server.

Now, let’s dive deeper into the differences between these two languages.

Application

One of the primary differences between Java and JavaScript language is their respective applications. Java is a general-purpose language that can be used for many applications, such as desktop, mobile, and enterprise applications. On the other hand, JavaScript is primarily used for creating dynamic and interactive web pages.

While both languages can be used for Web Development, Java is typically used for creating server-side web applications, while JavaScript is used for creating client-side applications. In simple words, Java runs on the server, and JavaScript runs on the client’s computer.

Syntax

Another significant difference between Java and Javascript is syntax. While both languages share some similarities in syntax, such as the use of semicolons and curly brackets, they have distinct differences that set them apart.

Java has a more complex syntax than JavaScript, making it more difficult for beginners to learn. Java is also a strongly-typed language, meaning variables must be declared with their data types before they can be used. This can make Java more verbose than JavaScript.

On the other hand, JavaScript has a more forgiving syntax, making it easier for beginners to learn. JavaScript is also a loosely-typed language, meaning variables do not need to be declared with their data types before they can be used. This can make JavaScript more concise than Java.

Runtime environment

Java and JavaScript also differ in their runtime environments. For example, Java requires the Java Virtual Machine (JVM) to run, which means that Java code is compiled into bytecode that can be executed on any platform with a JVM installed.

On the other hand, JavaScript runs in the user’s web browser, which means it does not require any additional runtime environment. Instead, JavaScript code is executed by the web browser’s JavaScript engine.

Object-Oriented Programming

Java and JavaScript are object-oriented programming (OOP) languages but have different approaches to OOP.

Java is a pure OOP language, meaning everything in Java is an object, and all operations are performed on objects. Java has strict rules for OOP, such as the use of classes and the implementation of interfaces.

On the other hand, JavaScript is a prototype-based OOP language, meaning it does not use classes. Instead, objects are created from other objects, and properties and methods can be added or removed from objects at runtime.

Performance

Java and JavaScript also differ in their performance. Java is a compiled language that is typically faster than interpreted languages like JavaScript. Java’s performance is also optimized for multi-threading, which allows it to handle complex and resource-intensive tasks.

On the other hand, JavaScript is an interpreted language, which means it is typically slower than compiled languages like Java. However, JavaScript’s performance has improved significantly over the years, and modern web browsers have optimized JavaScript engines that can handle complex tasks efficiently.

Error handling

Java and JavaScript also differ in their error handling. Java has a more robust error-handling mechanism than JavaScript, making debugging errors in large-scale applications easier. Java also has a feature called exceptions, which allows developers to catch and handle errors at runtime.

JavaScript, on the other hand, has a more forgiving error-handling mechanism, which can make it more challenging to debug errors in large-scale applications. In addition, JavaScript has a try-catch block feature, which allows developers to catch and handle errors at runtime.

Libraries and Frameworks

Both Java and JavaScript have a vast collection of libraries and frameworks that can help developers to build complex applications quickly and efficiently.

Java has a wide range of libraries and frameworks designed for various applications, such as Spring Framework, Hibernate, and Apache Struts.

JavaScript has many libraries and frameworks designed for Web Development, such as React, Angular, and Vue.js.

Java and Javascript examples

Java Program to Add Two Integers

Screenshot 2023-04-27 172707.png

Output

Screenshot 2023-04-27 172738.png

Javascript program to add two integers

Screenshot 2023-04-27 172820.png

Output

Screenshot 2023-04-27 172902.png

Try out our Online JavaScript Editor and Online Java Compiler to test your skills!

Conclusion

In conclusion, Java and JavaScript are two programming languages with distinct features that set them apart. Ultimately, the choice between Java and JavaScript depends on the specific needs of your project. For example, Java may be the better choice for creating a large-scale enterprise application. On the other hand, if you are designing a dynamic and interactive web page, JavaScript may be the better choice. However, both languages are versatile and can be used for various applications.

Do you plan to pursue Web Development as a career? If so, you can enroll in AlmaBetter’s Full Stack Web Development course, which will help you pursue your dream of becoming a successful Web Developer.

Frequently asked Questions

Q1: What is the difference between java and JavaScript syntax?

Ans: Both languages use a C-style syntax, but they each have some differences. For example, Java uses a very Object-Oriented Programming (OOP) language syntax whereas JavaScript uses a text-based programming syntax.

Q2: Should I learn java or JavaScript?

Ans: Javascript is easy to learn because it is interpreted at runtime and does not require a lot of technology running behind the scenes.

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