How to Calculate Area of Circle
In this tutorial you will learn the method of
calculating the area of circle.
In this program you will be taught each and every steps that have used in this
program. The description of this program is given below.
Description of program:
In this section we will learn how to use of static method. First of all, we have
to define class name "StaticCircle" then define further instance variable in the
class. After that we must declare method
class which take the double type value by using the "this.radius"
operator. Now we will have to declare the type double, which take the
defined value of radius and pi-value. Then we have to create object and call the
area of circle. After that it return the area of circle, return the doubles type
values. Thus output will be display on the screen by using the println() method.
The code is given below
class StaticCircle
{
public double radius;
double pi=3.14;
public void circle(double radius)
{
this.radius=radius;
}
public double area()
{
double a = radius*radius;
double piValue= a*pi;
return piValue;
}
public static void main(String[] args)
{
StaticCircle staticCircle = new StaticCircle ();
staticCircle.circle(10);
double i = staticCircle.area();
System.out.println("The area is " + i);
}
}
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