public class PlayCircle
1:
2: import java.util.*;
3:
4: public class PlayCircle
5: {
6: public static final double PI = 3.14159;
7:
8: private double diameter;
9:
10: public void setDiameter(double newDiameter)
11: {
12: diameter = newDiameter;
13: }
14:
15: public static double area(double radius)
16: {
17: return (PI*radius*radius);
18: }
19:
20: public void showArea( )
21: {
22: System.out.println("Area is " + area(diameter/2));
23: }
24:
25: public static void areaDialog( )
26: {
27: Scanner keyboard = new Scanner(System.in);
28: System.out.println("Enter diameter of circle:");
29: double newDiameter = keyboard.nextDouble( );
30: PlayCircle c = new PlayCircle( );
31: c.setDiameter(newDiameter);
32: c.showArea( );
33: }
34: }