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26 Cards in this Set
- Front
- Back
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Object Oriented Programming |
Programming methodology based on the use of the objects as unit of design and supports the following paradigms *Inheritance *Polymorphism *Encapsulation |
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Object |
Programming abstraction that represents an entity, encapsulating its parts, attributes and behaviors |
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Encapsulation |
Packaging together an object state |
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Inheritance |
Allows passing of attributes and behaviors from one class to another |
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Polymorphism |
Ability of an object having more than one type |
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Classes |
Template for object creation |
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Fields |
Data cells that represent the object state |
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Methods |
Represents object's behaviors |
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Information Hiding |
Hiding internal state, and implementing details from the rest of the program |
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Constructor |
Objects using the class code as a template |
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Default Constructor |
Creates the object, assigns default values to each field, depending on their tyoe |
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Overloading |
Defines different types of behaviors for a method, depending on the type of arguments |
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Shadowing |
Some variable name exists in different nested scopes, only the variable on the innermost scope is visible |
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Packages |
Mechanism of bundling together a set of related classes, and provides code organization and avoids name collision |
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Import Statements |
Used to import particular package in code |
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Array |
Most basic data structure used to fold multiple values of some data type |
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Array Initialization |
After allocating the array in memory, it is initialized by filling the array with default values |
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Bounds Checking |
Any time an instruction tries to access an array element outside of the valid index range Note: the VM, NOT the compiler will catch the mistake and throw the exception |
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Dynamically |
Means happening on run time, and not compile time |
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Class Extension (Extends) |
Keyword that allows passing of attributes/behaviors from one class to another |
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Specialization/Refinement |
Adding new fields and methods particular to the new type |
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Generalization |
Reverse process of going from a particular type (class) to a more general one |
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Final |
Specification that a method should never be overridden by sub-classes |
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Dynamic Dispatch |
When a method is called on a polymorphic object, method is both defined in the sub class and super class , then dynamic type will determine which version of the method will be used |
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Abstract Class |
Class designed to be extended, but not instantiated |
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Abstract Method |
Method which only the signature is given, but not implementation |
