JAVA Objects & Classes

JAVA Objects & Classes

1. Class

   • blueprint or template
   • determines what objects you get
   • must have at least one constructor
   • 3 considerations
     • classname
     • fields
       • variables and/or primitive references
     • methods
       • defines actions that a class's object can do
         • return types
           • primitive
           • object
           • void
         • method main
           • provides entry point
       • comprised of declaration & body
         • body
           • code to perform action
         • declaration
           • return value, method name, list arg

2. Object

   • 2 considerations
     • attributes/fields
     • actions/methods
   • new keyword followed by constructor of the class used to create new object
   • use reference variables to manipulate later
   • model for "real life"