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Add jep513 module: flexible constructor bodies on JDK 25 and 27

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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
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Claude
2026-09-24 10:42:36 +00:00
parent e0cb6e83e2
commit 2ebea58d39
30 changed files with 510 additions and 0 deletions
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jep513/output/03-same-file-on-21-25-27.txt
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$ javac broken/OnJdk21.java && java OnJdk21 (OpenJDK Runtime Environment (build 21.0.10+7-Ubuntu-124.04))
broken/OnJdk21.java:7: error: call to super must be first statement in constructor
super(name.strip());
^
1 error
$ javac broken/OnJdk21.java && java OnJdk21 (OpenJDK Runtime Environment Temurin-25.0.4.1+1 (build 25.0.4.1+1-LTS))
constructed
$ javac broken/OnJdk21.java && java OnJdk21 (OpenJDK Runtime Environment Temurin-27+35 (build 27+35))
constructed