JAVA Variables, Constants, Access Specifiers & Objects

VARIABLES

Variable is a named memory location which stores some value of a
particular datatype. Sounds Greek? Well…in layman’s terminology it is
a container which contains a value given by the user.

SYNTAX:   

dataType   variableName  = initialValue ;

EXAMPLE:

Int A=10;

INTIAL VALUES OF VALUES:

CONSTANTS

The keyword final before a variable declaration makes it a constant.
Thereafter its value cannot be changed during the course of the program.

EXAMPLE:

ACCESS SPECIFIERS

OBJECTS

Objects are instances of a class. A class is a blueprint and its concrete
version is established through objects.

THE new OPERATOR

The new operator is used to create instances of a class, that is, the objects
of the class.

SYNTAX:

class name object name=new class constructor( );

EXAMPLE:

Student s=new Student( );