public class CircleCalculation
1: //CircleCalculation.java
2:
3: /**
4: * Program to compute area of a circle.
5: * Author: Jane Q. Programmer.
6: * E-mail Address: janeq@somemachine.etc.etc.
7: * Programming Assignment 2.
8: * Last Changed: October 7, 2008.
9: */
10:
11: import java.util.Scanner;
12:
13: public class CircleCalculation
14: {
15: public static void main(String[] args)
16: {
17: double radius; //in inches
18: double area; //in square inches
19: Scanner keyboard = new Scanner(System.in);
20:
21: System.out.println("Enter the radius of a circle in inches:");
22: radius = keyboard.nextDouble();
23: area = 3.14159 * radius * radius;
24: System.out.println("A circle of radius " + radius + " inches");
25: System.out.println("has an area of " + area + " square inches.");
26: }
27: }