143-java-functional-exception-handling

What problem does it solve?

Java projects often rely on exceptions for control flow, creating brittle, hard-to-test error handling. This skill guides teams to adopt functional error handling patterns (Optional, Either) to clarify failure semantics, reduce exception overuse, and improve maintainability.

Core Features & Use Cases

• Replace non-critical exceptions with Optional for nullable results and Either<L,R> for business failures.
• Define robust error types using sealed classes, records, and enums to enable exhaustive pattern matching.
• Apply monadic composition to build readable, testable error flows in services, pipelines, and APIs.

Quick Start

Refactor a sample Java service to return Optional for nullable results and Either for recoverable failures, with accompanying tests.