Stay on top of Java news from 8 to 21

Do you know what's new in Java? Java has astounding news. Come with me to stay up-to-date with the latest Java news.

Transcript

1. Stay on top of Java news from 8 to 21 Thiago Bomfim
2. Table of contents Increase Development Productivity Performance and Garbage Collector How to stay up to date with the news Frameworks and Future 01 02 03 04
3. Increase Development Productivity 01
4. JAVA LTS
5. JEP JDK Enhancement Proposal
6. String
7. String
8. String JEP 378: Text Blocks Java 15
9. String JEP 430: String Templates (Preview) Java 21
11. String
12. String
13. String
14. String JEP 378: Text Blocks Java 15
15. String JEP 430: String Templates (Preview) Java 21
16. String JEP 430: String Templates (Preview) Java 21
18. InstanceOf
19. InstanceOf
20. InstanceOf JEP 394: Pattern Matching for instanceof Java 16
21. InstanceOf JEP 441: Pattern Matching for switch Java 21
22. InstanceOf
23. InstanceOf Polymorphism
25. InstanceOf
26. InstanceOf
27. InstanceOf JEP 394: Pattern Matching for instanceof Java 16
28. InstanceOf JEP 441: Pattern Matching for switch Java 21
32. InstanceOf
33. Sealed Class JEP 409: Sealed Classes Java 17
34. InstanceOf JEP 441: Pattern Matching for switch Java 21
35. Sealed Class JEP 409: Sealed Classes Java 17
36. Sealed Class JEP 441: Pattern Matching for switch Java 21
41. Records JEP 395: Records Java 16
42. Can we use Record for pattern matching?
43. Record Patterns JEP 440: Record Patterns Java 21
44. Record Patterns JEP 440: Record Patterns Java 21
45. Record Patterns
46. Record Patterns
47. Record Patterns
48. Record Patterns JEP 358: Helpful NullPointerExceptions Java 14
49. Record Patterns
50. Record Patterns JEP 440: Record Patterns Java 21
51. Record Patterns JEP 286: Local-Variable Type Inference Java 10
52. Record Patterns JEP 443: Unnamed Patterns and Variables (Preview) Java 21
53. Record Patterns
55. Main
56. Main JEP 445: Unnamed Classes and Instance Main Methods (Preview) Java 21
57. The goal of Project Amber is to explore and incubate smaller, productivity-oriented Java language feature. Project Amber • Pattern Matching for Switch • Pattern Matching for Instanceof • Unnamed Classes and Instance main methods • Local-Variable Type Inference (var) • Records • Sealed Classes • String Templates • Text Blocks • Switch Expressions • Unnamed Patterns and Variables
58. Performance and Garbage Collector 02
60. How many GC exists? A. 2 B. 3 C. 4 D. 5 E. > 5 F. Do we have more than one?
61. How many GC exists? A. 2 B. 3 C. 4 D. 5 E. > 5 F. Do we have more than one?
63. Parallel GC • Is the default until Java 9 • Is more focused on throughput
64. CMS • Was replaced by G1GC • It was removed by JEP 363 - Remove the Concurrent Mark Sweep (CMS) Garbage Collector, after Java 14
65. G1 • Is the default since Java 9 by JEP 248: Make G1 the Default Garbage Collector • More focus on the balance between throughput and latency • G1 continues to be improved, JEP 423: Region fix for G1, which may be available on Java 22 • JDK-8272773 - Configurable Card Table Card Size (-XX:GCCardSizeInBytes) available on java 18
66. Epsilon • No-Op GC • No latency because there is no GC execution. However, there is constant memory consumption; • JEP 318: Epsilon: A No-Op Garbage Collector (Experimental), available on Java 11 as Experimental
67. Shenandoah • Lower latency GC • JEP 379: Shenandoah: A Low-Pause-Time Garbage Collector (Production), available on Java 15 for production
68. ZGC • Lower latency GC • JEP 377: ZGC: A Scalable Low-Latency Garbage Collector (Production), available on Java 15 for production • Improving in ZGC on Java 21 - JEP 439: Generational ZGC
71. https://blogs.oracle.com/javamagazine/post/java-garbage-collectors-evolution
72. https://kstefanj.github.io/2021/11/24/gc-progress-8-17.html
73. https://kstefanj.github.io/2021/11/24/gc-progress-8-17.html
77. 50 VUs 50 requests per second 30 s Duration
78. 100 VUs 100 requests per second 30 s Duration
79. 400 VUs 400 requests per second 30 s Duration
80. 1000 VUs 1000 requests per second 30 s Duration
81. Frameworks and Future 03
88. Java 22 • JEP 454: Foreign Function & Memory API ✔ • JEP 423: Region Pinning for G1 ❓ • JEP 447: Statements before super() (Preview) ❓ • JEP 456: Unnamed Variables and Patterns ❓ • JEP 461: Stream Gatherers (Preview) ❓
89. Java ?? • JEP 460: Vector API (Seventh Incubator) • JEP 455: Primitive types in Patterns, instanceof, and switch (Preview) • JEP 459: String Templates (Second Preview) • JEP 404: Generational Shenandoah (Experimental) • JEP 401: Value Classes and Objects (Preview) ….
91. How to stay up to date with the news 04
92. How to stay up to date? Follow the OpenJDK documentation: https://openjdk.org/projects/jdk/
93. How to stay up to date? Search more JEPS: https://chriswhocodes.com/jepsearch.html
94. How to stay up to date? Not all improvements are done by JEP, so you can follow the release notes from Oracle https://www.oracle.com/java/technologies/javase/21-relnote- issues.html
95. How to stay up to date? Follow by blog, where I’m posting about best practices, and also news from Java 😁 https://devjava.substack.com/
96. https://www.linkedin.com/in/thiagobfim/ https://github.com/ThiagoBfim Slides provided by Slidesgo