Day 1

Objects and Messages

          - Object composition [private memory & operations]
          - Requests [in form of messages - Sender & Receiver]
          - Message arguments
          - Interfaces [Set of messages understood]
          - Encapsulation [Private memory for manipulation by private operations only]
          - Sender does not specify HOW to do it just WHAT to do
          - Polymorphism [comparing Fractions, Floats and Integers]

 Classes and Methods

•           Objects as instances
•           Class names
•           Class defines message implementation of instances [methods]
•           Class defines private data of instances [instance variables]
•           Examples: Point, Rectangle

Class Relationships

•           Simple UML Class Diagrams
•           Start Case Study: Draw simple related classes (specifying private data and interfaces)

Smalltalk Syntax

•           4 main kinds of expressions
•           Methods and Workspaces
•           Messages
•           Assignments
•           Blocks (simple)

Classes in Smalltalk

•           Introduce the Class Browser
•           Classes are objects [compare to Java and C++]
•           Class methods for creating instances [using them, not defining them]
•           Workspace examples [with Points, Arrays etc.]
•           Class methods, class variables and class instance variables
•           Variables and scope            

Inheritance

•           Class definitions

•           The Integer hierarchy

•           Message to method lookup

•           super vs self

•           Abstract vs Concrete classes

•           Inheritance of implementation vs inheritance of interface

•           Case study: Adding inheritance

Systems Classes

•           Closeup look at the special class hierarchies
•           Blocks are objects

Building Classes

•                 Defining classes

•                 Creating instances

•                 Defining Interfaces

•                 Case study: Define the classes (method stubs)

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Gidea Park, Essex,
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Tel: +44 1708 783438 (24 Hour Answer Service)
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training@totallyobjects.com
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