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Java 27 and 26: runnable demos and captured output for every JEP, plus version lanes

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Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01B38FGKKam5SCGgwgduVAh3
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asmhatre
2026-09-21 14:47:46 +00:00
committed by Claude
co-authored by Claude Sonnet 5
commit da55954922
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docs/output/84-security-manager.txt
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# System.setSecurityManager(new SecurityManager())
$ java SecurityManagerGone (JDK 21)
java.version = 21.0.12.1
setSecurityManager: UnsupportedOperationException: The Security Manager is deprecated and will be removed in a future release
$ java SecurityManagerGone (JDK 25)
java.version = 25.0.4.1
setSecurityManager: UnsupportedOperationException: Setting a Security Manager is not supported