Java 11 to 21 Evolution!
summary
Covers concrete changes from Java 11 through 21: six-month release cadence and LTS every two years, built‑in HTTP Client replacing external libraries, single-file source-code launch for quick scripting, ZGC and Shenandoah low‑pause collectors reaching production, and jpackage for native installers. Language additions that are production‑ready include switch expressions, text blocks, records, sealed classes and pattern matching; preview to production path proves by examples. Also shows microbenchmark harness, simple HTTP server, Project Loom’s virtual threads and structured concurrency being exercisable with current JDKs.
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chapters (19)
- 0:00Java 11 to 21 evolution
- 1:50Java relevance in 2023
- 5:19Java release cadence and LTS
- 8:11Java 11 key features
- 12:28Java 12 preview features and GCs
- 17:47Java 11 single-file launch
- 22:06Java 12 switch expressions and text blocks
- 26:21Project Loom and JDK modularity
- 28:09Java 14 switch expressions and null pointers
- 33:29Java 15 text blocks and records
- 36:24Java 16 records and pattern matching
- 42:07Java 17 sealed classes and packaging
- 46:44Java 18 UTF-8 and web server
- 48:49Java documentation improvements
- 50:57Java 19 virtual threads and RISC-V
- 51:57Java 20 preview features and concurrency
- 52:38Java 21 record patterns and string templates
- 59:00Java 21 unnamed classes and main
- 1:01:10Resources and closing
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