You Must Avoid Final Field Mutation - Inside Java Newscast #110

JDK 26 is restricting final field mutation via reflection, and developers need to adapt. The video covers alternatives for common use cases: platform serialization (use records, readResolve, or serialization proxy pattern), custom serialization libraries (prefer record-based protocols or proxy patterns), dependency injection (switch to constructor injection), and cloning (replace with copy constructors or static factory methods). The core advice is to embrace constructors as the single point of instance creation, since they properly assign final fields and enforce class invariants. The --enable-final-field-mutation flag exists as a last resort for cases with no other solution.