Groovy Basics

Getting started with Groovy programming. Covers installation, IDE setup, variables, data types, operators, and fundamental syntax for beginners.

Groovy Number Math – Cookbook Guide with 10+ Examples

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Groovy number math handling well beyond what Java offers. See 13 tested examples covering BigDecimal defaults, times/upto/downto loops, power operator, integer division, type coercion, abs/round/ceil/floor, currency formatting, random numbers, and numeric ranges. “In most languages, 0.1 + 0.2 equals 0.30000000000000004. In Groovy, it equals 0.3 – because Groovy chose BigDecimal as the default and saved us all from floating-point therapy.” Last Updated: July 2026 | Tested on: Groovy 5.0.6, Java 17+ | Difficulty: Beginner | Reading Time: 18 minutes Write ... 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

Groovy GDK – Cookbook Guide with 10+ Examples

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Paste myList.collect { it * 2 } into plain Java and the compiler rejects it. Run the same line in Groovy and it just works. The difference is the Groovy GDK, the extension layer that bolts hundreds of ready-made methods onto String, List, Map, and File. This post maps that toolkit with 14 tested examples, so you stop hand-writing helpers Java never gave you. “The GDK is why Java developers fall in love with Groovy – it takes the classes ... Read More