Object Based object Oriented u Object Based Programming Classes regarded as new data types Single layer in hierarchy Not convenient in"Entity-Relation" relationship s has is implemented of Object Oriented Programming Focus on the relationship between classes Hierarchical in structure Good at Entity-Relation" relationship Main features: inheritance and polymorphismObject Based & Object Oriented ◼ Object Based Programming ◼ Classes regarded as new data types ◼ Single layer in hierarchy ◼ Not convenient in “Entity-Relation” relationship – “is-a” – “has-a” – “is implemented of” ◼ Object Oriented Programming ◼ Focus on the relationship between classes ◼ Hierarchical in structure ◼ Good at “Entity-Relation” relationship ◼ Main features: inheritance and polymorphism