Java vs JavaScript

In this post, we will learn the difference between Java and JavaScript in Java. This is a frequently asked
question in Java interviews for beginners. Let's dive into it.

Java is a general-purpose, class-based, object-oriented programming language designed for having lesser implementation dependencies. It's a robust, secure, and high-performing language used for building enterprise-scale applications. 

JavaScript, on the other hand, is a dynamically typed programming language used both on the client side and server side to make web pages interactive. It's an interpreted scripting language primarily used for enhancing web interactivity and responsiveness.

Difference between Java and JavaScript in Java

Java JavaScript
Java is a statically-typed language. It means you need to declare variable types explicitly, and the type is checked at compile-time. JavaScript is dynamically-typed, which means the type is checked at runtime. Variable types need not be declared explicitly.
Java is a compiled language and requires a separate compilation step before it can be run. JavaScript is an interpreted language and does not require a compilation step.
Java is typically used for building complex enterprise-scale applications. JavaScript is primarily used for web development, to make websites interactive, and to provide online programs, including video games.
Java applications run on the Java virtual machine (JVM) irrespective of the underlying platform. JavaScript code is run on a browser only, and it is the default scripting language for all major browsers.
In Java, blocks are defined by braces ({}) but statements should end with a semicolon (;). In JavaScript, blocks are defined by braces ({}), and statements are ended with a semicolon (;). However, line breaks can also create a block in JavaScript.
Java is a class-based object-oriented programming language. JavaScript is a prototype-based language.
Java supports multithreading. JavaScript is single-threaded, which means only one operation can be processed at a time.
Java needs explicit memory management. JavaScript has automatic garbage collection.


While Java and JavaScript may share similar names, they serve different purposes and have different use cases, design principles, and performance considerations. Java is a powerful language for building complex, large-scale enterprise applications, while JavaScript is perfect for developing interactive web applications. 

Your choice between the two should depend on your project's requirements, complexity, and the environment in which it will run.