TAILIEUCHUNG - Lecture Software construction - Lecture 2: Introduction to object-orientation

This chapter presents the following content: The OO approach is based on modeling the real world using interacting objects; the statements in a class define what its objects remember and what they can do (the messages they can understand), that is, they define; the hardest concept in this set of lecture slides; a UML class diagram shows the “bare bones” of an OO system design. | Lecture 2 Introduction to Object-Orientation 1 Message Passing 2 In a method call, a message is passed to a receiver object. The receiver’s response to the message is determined by its class. (50, 100); Ball b = new Ball(10, 20, ); b: Ball xPos =10 yPos = 20 Color = Red b: Ball xPos = 10 60 yPos = 20120 Color = Red receiver message arguments public class Ball { . public void move(int deltaX, int deltaY) { xPos += deltaX; yPos += deltaY; } } Instance & Class Variables 3 Class variables are statically allocated, so they are shared by an entire Class of objects. The runtime system allocates class variables once per class, regardless of the number of instances created of that class. Static storage is allocated when the class is loaded. All instances share the same copy of the class variables. Instance variables are dynamically allocated, so they may have different values in each instance of an object. When an object is instantiated, the runtime system allocates some .

• Kỹ thuật lập trình
• Software construction
• Handbook Software construction
• Object oriented design
• Software design
• Object orientation
• Message passing
• Class variables
• Software change
• Software evolution
• Class diagrams
• Software design patterns
• Design patterns
• Maintenance echniques
• Maintenance management
• Software testing
• Test phases
• White box testing
• Strategy derives test data
• Software quality
• Extreme testing
• Requirements documentation
• Use cases
• Use case analysis
• Action events
• GUI programming
• User interface design
• User interaction
• Usability engineering
• Named associations