difference between java and javascript - ReYep
Execution Environment: Java code is typically compiled into bytecode, which can run on any device with a Java Virtual Machine (JVM). This provides platform independence and makes Java highly portable. JavaScript, however, is primarily executed within web browsers. It is interpreted by the browser's JavaScript engine and can access and manipulate elements on a web page, interact with the Document Object Model (DOM), and make asynchronous requests to servers.

Libraries and Frameworks: Java has a vast ecosystem of libraries and frameworks that offer a wide range of functionalities for various domains, including Spring, Hibernate, Apache Struts, and JavaFX. These frameworks provide solutions for web development, database access, dependency injection, and more. JavaScript also has a rich ecosystem with popular libraries and frameworks like React, Angular, Vue.js, and Node.js. These frameworks focus on front-end and full-stack web development, enabling the creation of interactive and scalable web applications.

Runtime Environment: Java requires a JVM to run its compiled bytecode. The JVM provides memory management, garbage collection, and runtime environment for executing Java applications. JavaScript, on the other hand, relies on the JavaScript engine built into web browsers. Each browser has its own JavaScript engine, such as V8 in Google Chrome and SpiderMonkey in Firefox, which interprets and executes JavaScript code.
Purpose: Java is a general-purpose programming language designed to build scalable and robust applications that can run on any device or platform. It is commonly used for server-side development, desktop applications, Android app development, and enterprise-level software. On the other hand, JavaScript is a scripting language primarily used for client-side web development. It enables interactive and dynamic elements on web pages, such as form validation, animations, and handling user events.

Syntax: Java and JavaScript have different syntaxes. Java uses a static typing system, which means you need to declare variable types explicitly. It follows a class-based object-oriented programming (OOP) approach, where classes define objects and their behavior. JavaScript, on the other hand, uses a dynamic typing system, allowing variables to hold values of any type. It follows a prototype-based OOP model, where objects inherit properties and methods directly from other objects.
while Java is a versatile language used for building various types of applications, JavaScript is primarily used for client-side web development. Java requires a compilation step and runs on a virtual machine, while JavaScript is interpreted by web browsers. They have different syntaxes, execution environments, and ecosystems, catering to different programming needs.
there are tons of differences between these two subjects. Most known is "Java is an OOP programming language while JavaScript is an OOP programming script. JavaScript code is written completely in text and need only be interpreted. Java, on the other hand, must be compiled."

But this can not explain everything if you are not into the computer world. And if you are asking the question you might not that nerd.