Java Conventions

Imports

• NEVER use wildcard imports (import java.util.* → import java.util.List)
• Sort imports: java/javax first, then third-party, then project-internal

Code Style

• Use Lombok annotations: @Data, @Builder, @Slf4j, @RequiredArgsConstructor — not manual getters/setters/constructors
• Use var for local variables when the right-hand side makes the type obvious
• NEVER use raw types — always specify generic parameters
• NEVER catch and swallow exceptions silently

Null Handling

• Use Optional for return types that may be absent, never return null from public methods
• Use Objects.requireNonNull for constructor parameters that must not be null

Build

• NEVER add dependencies without checking if they already exist in pom.xml.