TAILIEUCHUNG - Object-Oriented Programming Lecture 1: OOP Concepts
Object-Oriented Programming Lecture 1: OOP Concepts An object is a software bundle of related state and behavior, Software objects are often used to model the real-world objects that you find in everyday life; Objects are key to understand object-oriented technology. | Object-Oriented Programming Lecture 1: OOP Concepts Dr. Lê H!ng Ph"#ng -- Department of Mathematics, Mechanics and Informatics, VNUH July 2012 1 Friday, July 27, 12 OOP Concepts ✦ Object ✦ Class ✦ Inheritance ✦ Interface ✦ Package 2 Friday, July 27, 12 Object ✦ What is an object? ✦ An object is a software bundle of related state and behavior. ✦ Software objects are often used to model the real-world objects that you find in everyday life. ✦ Objects are key to understand object-oriented technology. 3 Friday, July 27, 12 Object ✦ Many examples of real-world objects: ✦ ✦ your dog, your desk, your television set, your bicycle Real-world objects share two characteristics: they all have state and behavior. For example: ✦ Dogs have state (name, color, breed) and behavior (barking, fetching, wagging tale). ✦ Bicycles also have state (current gear, current pedal cadence, current speed) and behavior (changing gear, changing pedal cadence, applying brakes). 4 Friday, July 27, 12 Object ✦ Identify the state and behavior for real-world objects is a good way to begin thinking in terms of OOP. ✦ Exercise 1: ✦ Observe the real-world objects that are in your immediate area, for each object that you see, ask yourself two questions: ✦ ✦ ✦ What possible states can this object be in? What possible behaviors can this object perform? Write down your observations 5 Friday, July 27, .
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