A class is a coded module that defines properties and methods, that are common to a given set of things.
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Property
A property is coded by including an instance variable to represent that feature.
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Method
A method is a procedure of function that holds the code for some kind of common behaviour for the class members.
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Construction
(included in every class) The basic purpose is to give instance variables an initial value. It is not included in the class.
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Abstract class
A class which cannot be instantiated (you cannot make a new one of these). A convenient way of grouping common properties of similar classes.
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Concrete class
A class that you can make instances of (eg Alien, Game and Missile)
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Object
An object is an individual instance of a given class. (eg Dim TheGame as NEW Game)
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Instantiation
The creation of an instance of a given class. This is particularly done via the New() procedure
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Encapsulation
All properties and methods for entities within the class are kept with the bounds of the class definition.
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Inheritance
Is the relationship between 2 classes where a child class taken on/uses/has access to the same properties and method as the parent class that it is related to. It is a "kind of link" between classes.
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Association
A term whcih expresses the fact that there is a relationship between 2 classes other than inheritance.
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Aggregation
Gives a "uses" relationship.
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Composition
Gives a "part-of" relationship.
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Polymorphism
Literally means "taking many forms". Can be implemented via Overriding and Overloading.
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Overloading
When a class can have two or more methods with the same name but each method must have different number/ combination of parameters. (eg might be multiple constructors in the same class)
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Overriding
A method from a parent class with a given name can be done differently by inheriting classes using the same method name.
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Data hiding
Done by restricting the scope of properties (instance variables).
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Private
Means they can only be accessed from the code for the class itself
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Protected
Means a property's scope is limited to the class itself and any inheriting classes
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Accessor (Getter)
These are usually functions as they just return the value of an instance variable.
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Mutator (Setter)
Alters the state of an instance variable and they tend to be procedures.
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Other cards in this set
Card 2
Front
A property is coded by including an instance variable to represent that feature.
Back
Property
Card 3
Front
A method is a procedure of function that holds the code for some kind of common behaviour for the class members.
Back
Card 4
Front
(included in every class) The basic purpose is to give instance variables an initial value. It is not included in the class.
Back
Card 5
Front
A class which cannot be instantiated (you cannot make a new one of these). A convenient way of grouping common properties of similar classes.
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