Groovy - TechnoScripts

Groovy

Groovy programming language tutorials, examples, and best practices.

Groovy Elvis Operator (?:) – Default Values Made Easy with 11 Examples

Groovy Elvis operator (?:) for concise default values. 10+ examples covering Elvis assignment, null handling, and real-world patterns. Tested on Groovy 5.0.6. “A little less conversation, a little more action.” — The Elvis operator takes that motto seriously: less boilerplate, more results. Last Updated: July 2026 | Tested on: Groovy 5.0.6, Java 17+ | Difficulty: Beginner to Intermediate | Reading Time: 15 minutes If you have ever written a long chain of if (x != null) x else defaultValue statements, ... Read More

Groovy Safe Navigation Operator (?.) – Avoid NullPointerException with 11 Examples

Groovy safe navigation operator (?.) to avoid NullPointerException. 10+ examples covering chaining, collections, and real-world patterns. Tested on Groovy 5.0.6. “I call it my billion-dollar mistake.” Tony Hoare, QCon London 2009 Last Updated: July 2026 | Tested on: Groovy 5.0.6, Java 17+ | Difficulty: Beginner to Intermediate | Reading Time: 15 minutes If you have spent any time writing Java, you know the pain of NullPointerException. It is the most common runtime exception in the Java ecosystem, and it typically ... Read More

Groovy Spread Operator (*.) – Apply to All Elements with Examples

The Groovy spread operator (*.) lets you call methods and access properties on every element in a collection. 10+ tested examples with output on Groovy 5.0.6. “Why write a loop when a single operator can do the job? The spread operator is Groovy’s answer to ‘apply this to everything.'” Last Updated: July 2026 | Tested on: Groovy 5.0.6, Java 17+ | Difficulty: Beginner to Intermediate | Reading Time: 15 minutes How many times have you written a loop or a ... Read More