Counter Example Of Acyclic Dependencies Principle

AcyclicDependenciesPrinciple is usually applied to packages.

When applied to objects, it doesn't seem to hold. Some ObjectOriented practitioners think that classes are a kind of packages, so the AcyclicDependenciesPrinciple should still hold. However, in SmalltalkLanguage we have the following CounterExample?:

  1. See the Object class.
  2. See the Boolean class.

Boolean is subclass of Object, but Object uses Boolean.

In Java the same occurs among Object and String.

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