Java Reference
In-Depth Information
Display 5.2
Class Definition with a
main
Added
1
import
java.util.Scanner;
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/**
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Class with static methods for circles and spheres.
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*/
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public class
RoundStuff2
6{
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public static final double
PI = 3.14159;
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/**
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Return the area of a circle of the given radius.
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*/
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public static double
area(
double
radius)
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{
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return
(PI*radius*radius);
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}
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/**
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Return the volume of a sphere of the given radius.
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*/
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public static double
volume(
double
radius)
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{
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return
((4.0/3.0)*PI*radius*radius*radius);
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}
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public static void
main(String[] args)
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{
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Scanner keyboard =
new
Scanner(System.in);
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System.out.println("Enter radius:");
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double
radius = keyboard.nextDouble();
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System.out.println("A
circle
of
radius "
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+ radius + " inches");
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System.out.println("has an area of " +
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RoundStuff.area(radius) + " square inches.");
System.out.println("A
sphere
of
radius "
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+ radius + " inches");
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System.out.println("has an volume of " +
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RoundStuff.volume(radius) + " cubic inches.");
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}
The dialogue is the same as in
Display 5.1.
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}
