TAILIEUCHUNG - Lecture Software engineering: Lecture 2 - Ivan Marsic

Lecture 2: The object model. The main contents of this chapter include all of the following: Objects and method calls, interfaces, UML notation, object relationships, process/algorithm –oriented vs. object, oriented approaches. | Ivan Marsic Rutgers University LECTURE 2: The Object Model Topics Objects and Method Calls Interfaces UML Notation Object Relationships Process/Algorithm –Oriented vs. Object Oriented Approaches Objects, Calling & Answering Calls Prime factorization of 905: 5 181 (2 distinct factors) Prime factorization of 1988: 2 2 7 71 (4 factors, 3 distinct) Two integers are said to be coprime or relatively prime if they have no common factor other than 1 or, equivalently, if their greatest common divisor is 1. Objects Don’t Accept Arbitrary Calls Acceptable calls are defined by object “methods” (. Operations, Procedures, Subroutines, Functions) method-1: Accept card method-2: Read code method-3: Take selection Object: ATM machine Object Interface Interface defines method “signatures” Method signature: name, parameters, parameter types, return type method-1 method-2 method-3 Interface Object hides its state (attributes). The attributes are .

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