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Add sealed module: modelling domains with sealed types and exhaustive switch

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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
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Claude
2026-09-24 12:03:59 +00:00
parent 65a4bbbbe3
commit ff6130bede
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sealed/output/08-modules.txt
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$ javac -d out $(find multi/demo.pay -name '*.java') && java -p out -m demo.pay/pay.app.Main (21.0.10+7-Ubuntu-124.04)
card in module demo.pay
$ javac -d out $(find multi/demo.pay -name '*.java') && java -p out -m demo.pay/pay.app.Main (25.0.4.1+1-LTS)
card in module demo.pay
$ javac -d out $(find multi/demo.pay -name '*.java') && java -p out -m demo.pay/pay.app.Main (27+35)
card in module demo.pay