Java Reference
In-Depth Information
Display 5.1 Static Methods (part 1 of 2)
1 /**
2 Class with static methods for circles and spheres.
3 */
4 public class RoundStuff
5{
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public static final double PI = 3.14159;
7
8 /**
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Return the area of a circle of the given radius.
10
*/
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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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}
This is the file
RoundStuff.java .
15
16
/**
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Return the volume of a sphere of the given radius.
18
*/
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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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}
1
import java.util.Scanner;
This is the file
RoundStuffDemo.java .
2 public class RoundStuffDemo
3{
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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();
System.out.println("A circle of radius "
9
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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 "
13
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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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}
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}
 
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