Modern Java Development Guidelines (Java 8+)

Identify and apply modern Java (Java 8+) refactoring opportunities to improve readability, maintainability, and performance.

What is covered in this Skill?

• Lambda expressions and method references (over anonymous classes)
• Stream API for declarative collection processing
• Optional for null-safe APIs
• java.time API (replacing Date/Calendar)
• Default interface methods, var type inference
• Unmodifiable collection factory methods (List.of(), Set.of(), Map.of())
• Text blocks for multi-line strings
• Java 25 Flexible Constructor Bodies (JEP 513)
• Java 25 Module Import Declarations (JEP 511)

Scope: The reference is organized by examples (good/bad code patterns) for each core area. Apply recommendations based on applicable examples.

Constraints