$ java -cp target/classes com.ankurm.reflection.FinalFieldDemo   # JDK 25

java.version = 25.0.5

== 1. final instance field ==
owner() now: mallory

== 2. static final field ==
IllegalAccessException: Can not set static final int field com.ankurm.reflection.Account.MAX_DEPOSIT to java.lang.Integer

== 3. record component ==
IllegalAccessException: Can not set final int field com.ankurm.reflection.FinalFieldDemo$Point.x to java.lang.Integer

== 4. constant inlining: the write 'works' but the getter never notices ==
Field.get -> 99
max()     -> 5

$ java -cp target/classes com.ankurm.reflection.FinalFieldDemo   # JDK 26

java.version = 26.0.2.1

== 1. final instance field ==
WARNING: Final field owner in class com.ankurm.reflection.Account has been mutated reflectively by class com.ankurm.reflection.FinalFieldDemo in unnamed module @18b4aac2 (file:/tmp/work/java-core-examples/reflection/target/classes/)
WARNING: Use --enable-final-field-mutation=ALL-UNNAMED to avoid a warning
WARNING: Mutating final fields will be blocked in a future release unless final field mutation is enabled
owner() now: mallory

== 2. static final field ==
IllegalAccessException: Can not set static final int field com.ankurm.reflection.Account.MAX_DEPOSIT to java.lang.Integer

== 3. record component ==
IllegalAccessException: Can not set final int field com.ankurm.reflection.FinalFieldDemo$Point.x to java.lang.Integer

== 4. constant inlining: the write 'works' but the getter never notices ==
Field.get -> 99
max()     -> 5

$ java --illegal-final-field-mutation=deny -cp target/classes com.ankurm.reflection.FinalFieldDemo   # JDK 26

java.version = 26.0.2.1

== 1. final instance field ==
Exception in thread "main" java.lang.IllegalAccessException: class com.ankurm.reflection.FinalFieldDemo (in unnamed module @18b4aac2) cannot set final field com.ankurm.reflection.Account.owner (in unnamed module @18b4aac2), unnamed module @18b4aac2 is not allowed to mutate final fields
	at java.base/java.lang.reflect.Field.preSetFinal(Field.java:1504)
	at java.base/java.lang.reflect.Field.setFinal(Field.java:1447)
	at java.base/java.lang.reflect.Field.set(Field.java:909)
	at com.ankurm.reflection.FinalFieldDemo.main(FinalFieldDemo.java:30)