Abstract methods: Declare a method in the parent class – implement in the child class.

• Textbook:

• Vehicle:

  • Declare a method move().

• Car (inherits Vehicle):

  • Also implements a method move().

• ? Car objects execute the move() method defined in the Car class.

• Math Example

• A Ring R:

  • Declare multiplication.

• C (inherits R):

  • Implement multiplication.

Reinterpreting behavior in the specialisation

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