Class in Java

A class is a group of objects that has common properties. It is a template or blueprint from which objects are created.

A class in java can contain:

• data member
• method
• constructor
• block
• class and interface

Syntax to declare a class:

1. class <class_name>{  
2.     data member;  
3.     method;  
4. }  

Simple Example of Object and Class

In this example, we have created a Student class that have two data members id and name. We are creating the object of the Student class by new keyword and printing the objects value.

1. class Student1{  
2.  int id;//data member (also instance variable)  
3.  String name;//data member(also instance variable)  
4.   
5.  public static void main(String args[]){  
6.   Student1 s1=new Student1();//creating an object of Student  
7.   System.out.println(s1.id);  
8.   System.out.println(s1.name);  
9.  }  
10. }
    

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