Types: Primitive Types & Classes

Differences between primitive types and classes

Primitive Types	Classes & Objects
int float double boolean	String Object ArrayList User-Defined Classes, e.g.,      Clock, Fish, Greeter
Construction
int i = 3; int k = 42;	Fish fish1 = new Fish(); Fish fish2 = new Fish();
Operations
+ - * / % (int only) i = i * 5; k = i + 2;	Methods defined in each class fish1.moveForward(); fish2.swimUp();