SubtypeCompatibleWithSupertype

SubtypeCompatibleWithSupertype

SubtypeCompatibleWithSupertype

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

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

Java

4.12.2 Variables of Reference Type

Subtyping Type Inheritance Reference

reference variable with given type referring to object of a supertype

Programming Language

Notional Machine

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