Groovy closures are one of the language’s most useful features. See 15 practical examples covering syntax, parameters, delegate, composition, and real-world patterns. Tested on Groovy 5.x. “Closures are the Swiss Army knife of Groovy. Once you understand them, every other feature clicks into place.” Venkat Subramaniam, Programming Groovy 2 Last Updated: March 2026 | Tested on: Groovy 5.x, Java 17+ | Difficulty: Intermediate | Reading Time: 22 minutes If there’s one feature that defines Groovy’s personality, it’s closures. They show ... Read More