• Aspects are the basic units for implementing aspect-oriented crosscutting concerns.
  • Aspects can include data members and methods.
  • Aspects can have access specifications
  • Aspects can declare themselves to be abstract
  • Aspects can extend classes and abstract aspects, as well as implement interfaces.
  • Aspects can be embedded inside classed and interfaces as nested aspects.
  • Aspects cannot be directly instantiated.
  • Aspects cannot inherit from concrete aspects.
  • Aspects can be marked as privileged. This gives them access to the private members of the classes they are crosscutting.
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