Computer Programming: Objects and Classes

Computer Programming: Objects and Classes

1. Object

   • Attributes (Fields)
   • Actions (Methods)
   • Example: Car
     • Attributes: Color, Number of Tires, License Plate Number, Make, Model, etc.
       • Actions: Run, Break, etc.

2. Classes

   • Classes are essentially blueprints that eventually guide the construction of Java objects
     • Class Name
       • Fields
         • Methods
           • Defines the actions that an object can do
             • Declaration Part
               • Return Value, Method Name, List of Arguments
             • Body
               • The Code that Performs the Action

3. Syntax for writing classes

4. UML Class Diagrams

   • Class Name
     • List of Fields
       • List of Methods

5. The Method Main

   • A special method that provides the entry point to the application, only ONE class in the application needs to have a main method

6. Constructors

   • Every class must have at least one constructor in order to create objects within the class

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