Groovy

Comprehensive Groovy programming tutorials, examples, and guides. Learn Groovy from beginner to advanced with tested code examples and real-world projects.

Groovy HTTP REST – Cookbook Guide with 10+ Examples

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Groovy HTTP REST networking concise and readable. See 12 tested examples covering URL.text, HttpURLConnection, GET/POST/PUT/DELETE, JSON payloads, response headers, error handling, basic auth, and java.net.http.HttpClient. “The best API client is the one you don’t need a library for. Groovy’s URL enhancements turn HTTP calls into one-liners – add Java’s HttpClient when you need more muscle.” Last Updated: July 2026 | Tested on: Groovy 5.0.6, Java 17+ | Difficulty: Intermediate | Reading Time: 22 minutes Every application talks to the network ... Read More

GPars Tutorial – Groovy Parallel Programming with 10+ Examples

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GPars tutorial with 13 tested examples. Learn parallel collections, Actors, Dataflow variables, Agents, and async patterns for high-performance Groovy parallel programming. One honest caveat before we start: GPars’ last release was 1.2.1 back in 2014 and the project is essentially unmaintained. It still works and its ideas are worth learning, but for new production code prefer java.util.concurrent, virtual threads (Java 21+), or structured concurrency. “Concurrency is not parallelism.” Rob Pike, Waza 2012 Last Updated: July 2026 | Tested on: Groovy ... Read More

Groovy Script vs Class – 10+ Tested Examples

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Run a bare println from a .groovy file and it just works, while the same line in Java demands a class and a main method. That magic has rules, and they bite once scripts grow. This guide walks the Groovy script vs class divide with 12 tested examples, from the wrapper class the compiler generates to the binding rules that decide which variables your methods can see. “A script is just a class that forgot to introduce itself – the ... Read More