What if Java had NullSafety without migrating your SpringBoot project to Kotlin?

JADEx Spring Boot Example This example introduces the core features of JADEx (Java Advanced Development Extension) through a Spring Boot User CRUD project. Table of Contents Overview Project Structure Getting Started Configuration Feature Guide Nullable Types Null-safe Access Operator Elvis Operator readonly Modifier Lombok Integration Optional Replacement Pattern API Testing Overview This example demonstrates how JADEx's 6 core features work in a