ABSTRACT CLASS

• CLASSES CAN BE DEFINED WITH ONE OR MORE UNDEFINED ATTRIBUTES
  
  
  • UNDEFINED ATTRIBUTE'S DATA STRUCTURE
  • UNDEFINED [RELATED] METHOD BODIES
  • DEFINED METHOD SIGNATURES
  
  
• ABSTRACT CLASS
  • A CLASS WHOSE ATTRIBUTES ARE UNDEFINED
  • ALSO KNOWN AS AN INTERFACE
  • CAN BE REFINED BY INHERITANCE INTO CONCRETE CLASSES

• ABILITY TO "SKETCH" A DESIGN

  • DEFER DEFINITION OF SUBOBJECTS [COMPONENTS]
  • CHANGE OR REPLACE SUBOBJECTS
  
  

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Ugo O. Gagliardi
GSD-6306 Spring 2003-2004