APCSA U1P2

Object

is an entity that represents an object or concept from the real world

Attributes

describes features of a class

null

null means a reference has not been assigned in a object

Instance variable

a variable declared within a class but outside any method, which holds unique data for each instance of the class and defines the state or characteristics of an object

Constructor

allow an object to be set up properly when it is first created

Constructor name

usually is the same name as the class

Methods

methods in a class typically are what actions you want to do

New Operator

assigns an instance a reference

No-args constructor

constructor with no parameters

Reference

is the hexadecimal address of where the object is stored in the computer’s memory during the program

void

doesnt return a value

accessor method

gives you access to private fields of an external class

Actual parameter

the values or expressions provided to a function or method when it is called

Formal Parameter

placeholders defined in the function signature or declaration