# 01-value-classes: ValueClasses.java on JDK 28 with --enable-preview
p == q: true, equals: true
isValue: true
synchronized on a value object: java.lang.IdentityException: Cannot synchronize on an instance of value class ValueClasses$Point
--- IntegerIdentity.java: same source, three runs
JDK 25:                 Integer 1000 == Integer 1000: false
JDK 28, no preview:     Integer 1000 == Integer 1000: false
JDK 28, --enable-preview: Integer 1000 == Integer 1000: true