Issue warnings to developers about using deep reflection to mutate final fields in Java, emphasizing the importance of integrity and performance. The Java platform will restrict the mutation of final fields by default in future releases, aligning with the expectations of immutability associated with final fields. While serialization libraries may need to adjust to these changes, the goal is to prevent the undermining of final field immutability in Java programs. Application developers can enable final field mutation selectively, acknowledging the need for flexibility while maintaining integrity by default. The Java runtime will control illegal final field mutation attempts with various warning options to ensure code safety.
https://openjdk.org/jeps/8349536