Java:OOP

Java:OOP

1. Attributes=Fields

2. actions=methods

3. Class: determines the objects

   • Objects: only with certain attributes within real-world objects
     • If an object does not have a value, we use null variable
   • class name
   • fields
   • methods
     • primitive
     • object
     • void: means return nothing
     • A special method: Main method, only one of the classes need to have a main method
   • need to have at least one constructor

4. UML Class Diagram: Has a class name, fields, and then methods separated by columns