Sealed Classes (JEP 409): This feature enhances the control over which classes or interfaces can be subclasses by introducing sealed classes and interfaces.

Foreign Function & Memory API (JEP 412): This JEP introduces an API for interacting with native code and memory in a more efficient and safer manner.

Pattern Matching for switch (JEP 406): Building on the pattern matching introduced in Java 16, this JEP aims to enhance the switch statement to support pattern matching for more concise and expressive code.

Strong encapsulation of JDK internals (JEP 403): This JEP aims to further strengthen the encapsulation of internal APIs in the JDK, making it harder to access them directly.

Foreign Function Interface (JEP 411): This is related to JEP 412 and focuses on introducing a Foreign Function Interface (FFI) to provide a pure Java API for calling native code and libraries.

Deprecate Applet API for Removal (JEP 398): The deprecated Applet API is targeted for removal in this version. This API has been largely outdated for modern web development.

Remove RMI Activation (JEP 411): This JEP proposes to remove the RMI Activation system, which is no longer considered essential and can be replaced with more modern alternatives.

Concurrent Thread-Stack Maps (JEP 376): This JEP focuses on improving the efficiency of thread-local storage and making it more scalable.

Deprecate and Remove Packaging Tool (JEP 392): The jpackager tool, which was introduced in Java 14 for packaging self-contained Java applications, is deprecated in Java 16 and planned for removal in Java 17.

UTF-8 by Default (JEP 400): This JEP aims to make UTF-8 the default character set for Java source files, improving the usability of the language.