Chapter 4 Objects & Classes

Chapter 4 Objects & Classes

1. Java objects

   • Fields
     • Vars
       • Primitives, references or other objects
         • Null value ref var
   • Methods
     • Declaration
       • Return value
         • Primitive
         • Void
         • Object
       • Args
       • Method name
     • Body
       • code that performs action
     • Method main
       • Entry point
       • Pass args to run a class
         • All args == Str

2. Classes

   • class name / fields / methods
     • Class name = Pascal case
     • Method & Field names = camel case
   • Constructor
     • Constructs object
     • Same name as class
     • No-arg