Hello Friends !! Today we are starting the concept of class.
Introduction to class !!
- A class is basically consist of data member and member function.
- Typically ,a class is declared by using the keyword class .
Syntax of basic class structure:
class classname
{
Type instance-variable1;
Type methodname(parameter-list)
{
//body of method
}
}
Data ,or variables ,defined within in a class are called instance variables.The code is contained within the methods.
A simple class :
class abc{
int x;
int y;
}
Create an object of class abc:
abc a1=new abc();
where abc is class name and abc() is constructer
to assign value to the int x with the help of object :
a1.x=10;
a1.y=2;
/* here is the complete program that uses the abc class…
/* save this file as def.java
*/
class abc{
int x;
int y;
}
//this class declare an object of type abc
class def
{
public static void main(String[] args)
{
abc a1=new abc();
int z;
a1.x=10;
a1.y=2;
z=a1.x * a1.y;
System.out.println(“the product of x & y” + z );
}
}
o/p:
the product of x &y 20
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