java 21 features with examples | Java 21 features #java21 #agtechjava

Key Features Finalized:
1. Virtual Threads:
Virtual threads are now finalized, making it easier to handle concurrency with lightweight threads.

2. Record Patterns (Project Amber):
Record patterns have been finalized, allowing more concise data extraction in patterns.

3. Pattern Matching for `switch` Statements:
Pattern matching in `switch` statements has reached its final form, providing a streamlined way to handle multiple object types.

4. Sequenced Collection:
A new `SequencedCollection` API has been added, enabling direct access to an ordered collection's first and last elements.

5 Foreign Function & Memory API (Third Preview) [JEP-442]:
Continues to evolve the API for calling native code and managing off-heap memory with improved safety and performance

6 Scoped Values:
Introduced as a preview API for sharing data between threads in a controlled manner.

Preview Features:
5. String Templates:
String templates allow embedding expressions directly into strings, improving readability.

6. Unnamed Classes & Instance `main()` Methods:
Allows running Java code without naming classes explicitly, simplifying simple scripts and quick tests.

7. Scoped Values:
Introduced as a preview API for sharing data between threads in a controlled manner.

8. Unnamed Patterns and Variables:
Enables the use of unnamed patterns and variables, which can simplify certain code patterns.

9. Structured Concurrency:
Structured concurrency remains in preview, providing a better way to manage tasks and their lifecycle.

Other Changes:
10. Generational ZGC [JEP-439]:
An enhancement to the Z Garbage Collector to support generational garbage collection, improving application performance.

11. Pattern Matching for `switch` [JEP-441]:
Finalizes the enhancements to pattern matching for `switch` to handle various types effectively.

12. Foreign Function & Memory API (Third Preview) [JEP-442]:
Continues to evolve the API for calling native code and managing off-heap memory with improved safety and performance.

13. Vector API (Sixth Incubator) [JEP-448]:
Ongoing enhancements to the Vector API for expressing vector computations, aiming for better performance on modern CPUs.

14. Deprecate the Windows 32-bit x86 Port for Removal [JEP-449]:
Marks the Windows 32-bit x86 port as deprecated, signaling its eventual removal from future Java releases.

15. Prepare to Disallow the Dynamic Loading of Agents [JEP-451]:
Lays the groundwork for restricting dynamic loading of Java agents for improved security and reliability.

16. Key Encapsulation Mechanism API [JEP-452]:
Introduces an API for key encapsulation mechanisms, providing better cryptographic operations for securing data.
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