1. Classes and Objects
Still Chapter 1

2. Defining a class Lets define a automobile class;
Lets look how to create a class in Greenfoot
Why do we need to define the class?
What do we need to define in a class?

3. Designing a Class Class Diagram Class Name
Data/characteristics/attributes
Ask the question about the characteristics of the objects of this class?
What can objects of this class do?
How can we control objects of this class?

4. Class Car
Class Car { // characteristics // operations/functions/methods }

5. How to instantiate an object?
Car mycar = new Car();
Car mycar = new Car(“Blue Car”);

6. How to invoke operations?
Car mycar = new Car();
mycar.setColor(“Blue”);

7. Lets construct this scenario on Greenfoot
A new world..
A new actor..
Etc.

8. Lets look at the Wombat world
Lets re-create Wombat class
Can we reverse engineer the class diagram from the code?

9. 10 things Class Object Method Data Class design Java Class structure
Object instantiation
Create new World
Create new Actor
Naming conventions