1. Chapter 9
Classes & Objects

2. Objectives Explain encapsulation. Explain the purpose of inheritance.
Explain the purpose of overriding and overloading.
Create and explain the use of constructors.
Use setter and getter methods.
Create a basic UML diagram.
Create a program that inherits properties from another program.

3. Class A class defines a particular kind of object.
Each class is a blueprint that tells Alice exactly how to create and display an object.
Classes begin with a capital letter.

4. Objects
When an object is created and displayed, we call this instantiating the class because an object is an instance of that class.
Object names begin with a lowercase letter.

5. Object-Oriented Programming Concepts
Encapsulation - lets you create a class template for creating objects. It is the process of hiding the attributes of a class and making them accessible via the object’s methods.
Inheritance - enables you to create a class that is similar to a previously defined class, but one that still has some of its own properties. 
Polymorphism – allows you to create new objects that perform the same methods as the base object but which perform one or more of these functions in a different way. 
Overloading
Overriding

6. Declaring Objects Cow cow1 = new Cow ( ……..);
Adult emily = new Adult ( …..);
Button clearButton = new Button ( );

7. Constructor
A constructor is a method with the same name as the class (including case sensitivity).  
A class can contain several constructors to provide a variety of means for initializing objects of that class. 
MyFishy nemo =  new MyFishy( );
public MyFishy( ) { }

8. Alice Setters and Getters

9. Unified Modeling Language (UML)

10. Class Template

11. Application to Run Class Template