Java Language Specification, Version Java SE 21 Edition

4.12.2. Variables of Reference Type

6 Documented Misconceptions

MultiReferenceVariable

A reference variable can point to multiple objects

ReferenceIntoStack

References can point into the stack

ReferenceToVariable

References can point to variables

SubtypeCompatibleWithSupertype

A variable of a subtype can reference an object of a supertype

SupertypeIncompatibleWithSubtype

A variable of a supertype cannot reference an object of a subtype

VariablesHoldObjects

A variable of a reference type contains a whole object