Learn Groovy traits for reusable behavior composition with 10+ tested examples. Trait methods, fields, interfaces, conflicts, and runtime traits on Groovy 5.x. “Favor composition over inheritance. Traits give you the best of both worlds – you compose behavior like interfaces but with real implementation.” Guillaume Laforge, Groovy Project Lead Last Updated: March 2026 | Tested on: Groovy 5.x, Java 17+ | Difficulty: Intermediate | Reading Time: 18 minutes Sharing behavior across classes that don’t share a common ancestor is painful ... Read More