Scjp

Front 1

Java program

Back 1

a collection of objects talking to other objects by invoking
each other's methods. Every object is of a certain type, and that type is defined by a
class or an interface. Most Java programs use a collection of objects of many different
types.

Front 2

Class

Back 2

A template that describes the kinds of state and behavior that objects
of its type support.

Front 3

Object

Back 3

At runtime, when the Java Virtual Machine (JVM) encounters the
new keyword, it will use the appropriate class to make an object which is an
instance of that class. That object will have its own state, and access to all of
the behaviors defined by its class.

Front 4

State (instance variables)

Back 4

Each object (instance of a class) will have its
own unique set of instance variables as defined in the class. Collectively, the
values assigned to an object's instance variables make up the object's state.