design patterns

Classic design patterns with concise Groovy implementations.

Groovy Design Patterns – Singleton, Strategy, Observer with 10 Examples

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Learn Groovy design patterns with 10+ tested examples. Master @Singleton, Strategy with closures, Observer, Builder, Factory, and Decorator with traits. “Design patterns are not about being clever. They are about being clear. Groovy makes them so clear you almost forget they are patterns.” Gang of Four, Design Patterns Last Updated: March 2026 | Tested on: Groovy 5.x, Java 17+ | Difficulty: Intermediate to Advanced | Reading Time: 25 minutes In Java, implementing a Gang of Four pattern means creating an ... Read More

Groovy @Builder Annotation – Builder Pattern Made Easy with 10+ Examples

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Groovy builder pattern with the @Builder annotation with 10+ examples. DefaultStrategy, SimpleStrategy, ExternalStrategy, InitializerStrategy explained. “The builder pattern separates the construction of a complex object from its representation. Groovy’s @Builder does this without writing a single builder class.” Gang of Four, Design Patterns Last Updated: March 2026 | Tested on: Groovy 5.x, Java 17+ | Difficulty: Intermediate | Reading Time: 19 minutes When a class has many fields – some required, some optional – constructors become unwieldy and map-based construction ... Read More