JavaScript Runtimes

Rhino

Rhino is an open-source JavaScript engine written in Java, developed by Mozilla, that allows JavaScript code to be executed within Java applications. It enables developers to embed JavaScript functionality into Java programs, providing a bridge between the two languages for scripting, automation, and dynamic behavior. It is commonly used for tasks like server-side scripting, testing, and extending Java applications with JavaScript-based logic.

Also known as: Mozilla Rhino, Rhino JS, Rhino JavaScript Engine, Rhino-Java, JS in Java

🧊Why learn Rhino?

Developers should learn Rhino when working on Java projects that require JavaScript integration, such as building plugins, automating tasks with scripts, or creating dynamic web applications where Java and JavaScript need to interact. It is particularly useful in environments like Apache Sling or older Java-based systems where embedded scripting is needed for customization or rapid prototyping without recompiling Java code.

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Compare Rhino

Rhino vs Nashorn→Rhino vs Graalvm→Rhino vs V8→

Learning Resources

Mozilla Rhino Documentation

Rhino GitHub Repository

Oracle Nashorn vs Rhino Tutorial

Embedding JavaScript in Java with Rhino

Related Tools

Javascript Java Server Side Scripting Scripting Engines Mozilla

Alternatives to Rhino

Nashorn Graalvm V8

Other JavaScript Runtimes

.env is a file format and tool used to store environment variables, which are key-value pairs that configure application settings like API keys, database URLs, and other sensitive or environment-specific data. It allows developers to separate configuration from code, making applications more secure and portable across different environments (e.g., development, testing, production). Tools like dotenv in Node.js or python-dotenv in Python parse .env files to load these variables into the application's environment at runtime.

.htaccess (Hypertext Access) is a configuration file used on Apache web servers to control directory-level settings, such as URL redirection, access control, and performance optimizations. It allows developers to override global server configurations for specific directories without modifying the main server configuration files. This file is commonly used for tasks like password protection, custom error pages, and enabling features like mod_rewrite for URL manipulation.

.htaccess (Hypertext Access) is a configuration file used on Apache web servers to control directory-level settings, such as URL redirection, access control, and performance optimizations. It allows developers to override global server configurations for specific directories without modifying the main server configuration files. This file is commonly used for tasks like enabling HTTPS, blocking IP addresses, or setting custom error pages.

.htaccess Redirect

.htaccess redirect is a server-side configuration technique using the .htaccess file on Apache web servers to manage URL redirections, such as redirecting old URLs to new ones, enforcing HTTPS, or handling errors like 404 pages. It operates through directives like Redirect, RedirectMatch, and RewriteRule, allowing developers to control traffic flow without modifying server-wide settings. This method is essential for SEO, user experience, and maintaining link integrity during website migrations or updates.

.NET Interactive

.NET Interactive is an open-source tool that enables interactive programming experiences across multiple languages (C#, F#, PowerShell, SQL, HTML, JavaScript) within notebooks like Jupyter, Visual Studio Code, and Azure Data Studio. It allows developers to create and share executable documents that combine code, visualizations, and narrative text, facilitating data exploration, documentation, and teaching. The tool integrates with the .NET ecosystem, providing rich output capabilities and extensions for data science and machine learning workflows.

.NET Profiling Tools

.NET profiling tools are software utilities used to analyze the performance, memory usage, and behavior of .NET applications during execution. They help developers identify bottlenecks, memory leaks, and inefficiencies by collecting data on CPU usage, garbage collection, thread activity, and method execution times. These tools are essential for optimizing .NET applications to ensure they run efficiently and reliably in production environments.