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9 Cards in this Set
- Front
- Back
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hierarchy
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Ordering based on some relationship.
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abstraction
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Highlighting important properties or features while hiding the nonessential details. Allows us to reduce complexity to a manageable level.
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encapsulation
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Information hiding. Seperating components of an object into internal and external views.
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modularity
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Use of smaller components to construct larger systems. Makes a complex system easier to understand. Reduces cost of systems if the components are reusable or off-the-shelf.
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dependency
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There are different kinds of relationships among classes. This one is the weakest. Represents a "uses-a" relationship. Sometimes called realization.
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association
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One of the stronger relationships between classes. Occurs any time that an object from one class is used within another.
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aggregation
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A special kind of association (has-a) that results when a client class contains one or more instance variables belonging to another type (implements modularity). Allows you to build complex objects from existing components.
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inheritance
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The ability of a class to inherit attributes and behaviors from a parent class. Defines a relationship among classes. Shown by the java keyword "extends". Used with a is-a relationship.
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polymorphism
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Used to describe a variable that may refer to objects whose class is not known at compile time and which respond at run time according to the actual class of the object to which they refer
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