1. Haidong Xue Summer 2011, at GSU
Principles of Computer Programming (using Java) Chapter 3 Classes and Objects
Haidong Xue
Summer 2011, at GSU

2. Content
Quiz2
Assignment3
Classes

3. Quiz 2
1:50pm – 2:00pm

4. Classes and Objects Object model Declare a class
State, behavior
Declare a class
Modifier, name, body
Constructor (default)
Overloading, signature
Declare member methods
Modifiers, return type, name, parameters, body
Declare member variables

5. Classes and Objects Use classes Create instances of classes
Object variables
Modifiers (on classes; on member methods or member variables)
Packages
Declare the package which the class belongs to
Use the classes in other packages

6. Examples HaydonsWorld.java PersonsInCSC2310.java Data: (nothing)
Actions: main(…)
PersonsInCSC2310.java
Data: …
Actions: …