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Author SHA1 Message Date
asmhatreandClaude Sonnet 5.5 2e25042a68 Add pem-api module: PEMDecoder/PEMEncoder (JEP 538 preview on JDK 27, JEP 542 final in JDK 28) for JWT keys, TLS, encrypted keys and BouncyCastle migration 
Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01CifR2BE7PBvRy5hT8TS9oz
 2026-10-26 01:50:05 +00:00
asmhatre c3cc57f482 Add java21-features module: runnable demos and captured output for the ankurm.com java21-features article 2026-10-20 17:13:59 +00:00
asmhatre 5a076c826f Add java17-features module: runnable demos and captured output for the ankurm.com java17-features article 2026-10-20 17:13:58 +00:00
asmhatre 8b9447a393 Add java11-features module: runnable demos and captured output for the ankurm.com java11-features article 2026-10-20 17:13:58 +00:00
asmhatre 77c782abbf Add java8-features module: runnable demos and captured output for the ankurm.com java8-features article 2026-10-20 17:13:58 +00:00
asmhatreandClaude Sonnet 5.5 d565be93c6 Add jdk27-perf: the same Spring Boot service measured on JDK 25 and JDK 27 
Live heap, throughput, p99 and startup across four configurations, including opt-in and opt-out of
compact object headers.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01WzVQ6zFh9cuLPj9RSbRH8U
 2026-10-12 17:30:55 +00:00
asmhatreandClaude Sonnet 5.5 fc05eed4b5 Add compact-strings module: Compact Strings (JEP 254) measured with JOL on JDK 25, with and without -XX:-CompactStrings, and compact object headers on 25 vs 27 
Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01KqJyCidz3ZgRyHABv2GVJh
 2026-10-01 04:23:27 +00:00
asmhatreandClaude Sonnet 5.5 fadfd05670 Add http3 module: HTTP/3 in the Java HTTP Client (JEP 517), opt-in, discovery modes, fallback timings, proxy downgrade and a packet-loss comparison 
Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01KqJyCidz3ZgRyHABv2GVJh
 2026-09-30 20:27:46 +00:00
Claude c8ff3acf09 Add jdk28-preview module: JDK 28 early-access build, value classes, strict init flag, PEM, JSON incubator 
Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Gth99spB1CzQmBFofXmU4Z
 2026-09-28 08:48:04 +00:00
Claude 57a04dc393 Add migration-17-25 module: Java 17 class files run on 17 and 25, flags, removed APIs, jdeps and jdeprscan 
Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Gth99spB1CzQmBFofXmU4Z
 2026-09-28 08:42:19 +00:00
Claude 814c32b5ce Add lazy-constants module: LazyConstant (JEP 531) against the holder idiom and double-checked locking 
Basics, failure semantics on 26 vs 27, lazy collections, API across 25/26/27, preview-flag traps and a JMH read-path benchmark (jars fetched and sha1-checked, not committed).

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
 2026-09-24 12:27:27 +00:00
Claude af44e59e7f sealed: make the WalletNotHandled flat fee match the other examples 
NetBanking flat fee is 15 everywhere; transcripts unchanged.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
 2026-09-24 12:15:14 +00:00
Claude d2c1efc2c4 sealed: add release-level and Jackson 3.2.3 transcripts 
09 shows which language level each sealed feature needs; 10 runs the Payment model through Jackson 3 (jars fetched and sha1-checked, not committed).

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
 2026-09-24 12:08:23 +00:00
Claude ff6130bede Add sealed module: modelling domains with sealed types and exhaustive switch 
Payment model, permits and the three modifiers, default-branch trap, generic and recursive hierarchies, visitor comparison, run-time enforcement, modules. Transcripts from JDK 21, 25 and 27.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
 2026-09-24 12:03:59 +00:00
Claude 65a4bbbbe3 patterns: run Guards, NullCase and MatchException demos on 21 too; add switch-on-long check 
Adds broken/SwitchOnLong.java and regenerates transcripts so every 'runs on 21, 25 and 27' claim has a transcript. Additive commit.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
 2026-09-24 11:54:48 +00:00
Claude bc91b9c8d0 Add patterns module: pattern matching from JDK 21 to 27 
Type, record and primitive patterns, guards, sealed exhaustiveness, MatchException via separate compilation, and eight captured transcripts.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
 2026-09-24 11:50:40 +00:00
Claude 96b25c8fc4 jep511: add the star-import clash demo, java.base export count and a java.time jshell check 
TwoStarImports.java, the java.base export count in output/04, the extra LocalDate line in src/imports.jsh and regenerated transcripts. Additive commit.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
 2026-09-24 11:42:45 +00:00
Claude 385cc25233 Add jep511 module: module import declarations on JDK 25 and 27 
Runnable sources, deliberate compile failures, three small modules and nine captured transcripts for import module (JEP 511).

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
 2026-09-24 10:57:57 +00:00
Claude 2ebea58d39 Add jep513 module: flexible constructor bodies on JDK 25 and 27 
Runnable sources, broken examples and captured transcripts for the ankurm.com JEP 513 article, including the JDK 25 vs 27 compiler wording differences.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
 2026-09-24 10:42:36 +00:00
Claude e0cb6e83e2 Add jep512 module: compact source files and instance main methods on JDK 25 and 27 
Runnable sources, broken examples and captured transcripts for the ankurm.com JEP 512 article,
including the measured launch order and a private-constructor difference between 25 and 27.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
 2026-09-24 10:32:47 +00:00
Claude 6b5a918278 Add two standalone modules: Stream Gatherers (JEP 485) and Scoped Values vs ThreadLocal (JEP 506) 
gatherers/: windowFixed, windowSliding, fold, scan, mapConcurrent, a custom
Gatherer (dedupeConsecutive, takeUntil), and a Collector-vs-Gatherer comparison.
Verified: windowSliding emits one short window on a too-short stream rather than
shrinking to empty like windowFixed; mapConcurrent waits for in-flight siblings
to finish (~901ms) rather than cancelling them when one mapper throws.

scoped-values/: ScopedValue API and rebinding, why plain threads (virtual or
platform) do not inherit a binding while a StructuredTaskScope subtask does,
and the memory cost vs InheritableThreadLocal measured two ways -- a noisy
heap-delta first pass, then a precise jcmd GC.class_histogram object census
(5 shared Carrier objects vs ~700,000 copied ThreadLocalMap/Entry objects for
100,000 threads).

Companion code for the ankurm.com posts "Java Stream Gatherers (JEP 485)" and
"Scoped Values vs ThreadLocal in Java 25: Migration Guide with Virtual Threads".

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01FtpJvZfg4nvLvtzgJTDWpB
 2026-09-24 04:27:12 +00:00
asmhatreandClaude Sonnet 5 f59c1de96d Java 27 and 26: runnable demos and captured output for every JEP, plus version lanes 
Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01B38FGKKam5SCGgwgduVAh3
 2026-09-21 15:08:50 +00:00