To calculate Area of Circle in java program

### Area of Circle in java

The following Java program to print the area of a circle has been written in five simple different ways, static method, using constructor, Interface, inheritance with sample outputs for each program.

**Source Code**

import java.io.*;

import java.util.*;

class Area

{

public static void main(String []args)

{

Scanner ob=new Scanner(System.in);

int l,h,r;

System.out.println(“enter value l,h,r”);

r=ob.nextInt();

int c=(double)3.14*r*r;

System.out.println(“area of circle:”+c);

}

}

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