Class:-

Class in Java is the selection of similar types of object. From one class we can create n number f objects and n number of objects getting together to make a class.

A class is declared using class keyword.

Pro-grammatically class is nothing but a keyword which is used to declare any user-defined class.

It is the blueprint or skeleton of objects.

A class is a user-defined prototype from which objects are created.

Class can’t be physical.

The class is a logical entity.

Combining these language features into classes is known as encapsulation.

A class contains both data and code that operate on that data.

A class can contain 3 types of variable

The class is a logical container which never allocates any memory.

• In java point of view, a class is the collection of 4 types of member:-

1. Data member/Variable
2. Function
3. Constructor
4. Block

Rules of class:-

• Never starts with a digit
• Space is not allow
• The keyword is not allow
• The symbol is not allowed except ‘ _ ’ and  ‘ &’.

Example :-

Class Test_a

{

Int x=100; //datamember

Void show() //function

{

{

Test_a() //constructor

{

}

Static() //static block

{

{
//nonstatic block

}

}

}

 

Also Read:-Data member/Variable

Also Read:-Function

Also Read:-Constructor

Also Read:-Block