reflection: Method/Field/MethodHandle/VarHandle demos, module and final-field rules (JEP 500 on JDK 26), JMH call-cost numbers, contract tests

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b6NtPJHrkan4BXhCAM

reflection/output/02-module-rules.txt

@@ -0,0 +1,24 @@
+$ java -cp target/classes com.ankurm.reflection.ModuleRulesDemo
+
+== setAccessible on your own class ==
+Account.owner = carol
+
+== setAccessible on a JDK private field ==
+String lives in module : java.base
+we live in module      : unnamed module @6b95977 (unnamed=true)
+java.lang open to us   : false
+trySetAccessible       : false
+setAccessible threw    : InaccessibleObjectException
+  Unable to make field private final byte[] java.lang.String.value accessible: module java.base does not "opens java.lang" to unnamed module @6b95977
+
+$ java --add-opens java.base/java.lang=ALL-UNNAMED -cp target/classes com.ankurm.reflection.ModuleRulesDemo
+
+== setAccessible on your own class ==
+Account.owner = carol
+
+== setAccessible on a JDK private field ==
+String lives in module : java.base
+we live in module      : unnamed module @3764951d (unnamed=true)
+java.lang open to us   : true
+trySetAccessible       : true
+setAccessible worked, String.value is a byte[]