java notes

Class and Object
• A class is merely a template for one or more
objects. It describes an object’s behavior
and state.
• It does not create any objects.
• When a programmer wants to create an
object the new operator is used with the
name of the class.
• Creating an object is called instantiation.

Objects
• Many programs are written to model
problems of the real world.
• It is convenient to have "software objects"
that are similar to "real world objects." This
makes the program and its computation
easier to think about.
• Object-oriented programming solve a
problem by creating objects that solve the
problem.