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Title: Computer Science Terms

Essay Details

Subject: Technology
Author: Jennifer W
Date: January 31, 2015
Level: University
Grade: A
Length: 4 / 1173
No of views: 0
Essay rating: good 0, average 0, bad 0 (total score: 0)

Essay text:

To abstract is to disregard certain differentiating details Data: the info the program deals with Functionality: what the program does with the data, the responsibility of the object to do Object: the most abstract description of a basic component of an object oriented system Values: a fundamental piece of info that can be manipulated by the program Types: a set of related values along with the operations that can be preformed with them Object: fundamental abstractions from which systems are built Classes: a set of objects having the same features and properties State of an object: the set of data maintained by an object at any given time Reference values: a value that denotes an object Data descriptions: properties of the object (name, date, etc) Associated value: a property an object has at any given time Variable: a portion of memory reserved to hold a single value Instance variables: a variable that is a permanent part of an object: memory space for the variable is allocated when the object is created Immutable: an object that's state cannot be changed Mutable: and object that's state can be changed *An object is characterized by the features it offers* 1...

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Query: a request for data 2. Command: a request to change state Float & Double: sets of real rational numbers (i.e. 170000 or 1.4e12) Char: set of values representing Unicode characters Boolean: true or false values Int value: contains a single integer String: and immutable object that contains a sequence of characters Identifier: a sequence of characters that can be used as a name in a Java program Literal: a sequence of characters that denotes a particular value in a Java program Comments: explanatory remarks that are included in a program for the benefit of a human reader and are ignored by the compiler Chapter 2: Features of an object: queries and commands *A client queries and commands a server* Specification (interface): definition of an object's features, as seen by its clients Implementation: provides the internals that actually make up the features Packages: groups of classes Public class: indicates that the objects of that class will be accessible throughout the system Public void: a command is a query that changes the state of the object but do not provide the client with a value Method: a language construct that defines and implements a query or command Constructor: a language construct used to create and initialize an object Static diagrams: diagrams showing classes Stub: dummy method or constructor New: used to invoke a constructor and create an object Interaction diagram: means of illustrating the order in which objects interact Statement: provides the action that the processor is to carry out Expression: a language construct that describes how to compute a particular value...

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