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CS1 Course Site
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Programming Challenge Archive
Application Architecture
Functional Application Architecture
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JavaApplication --
PercentWhite
// General Information
// ---------------------------------------------------
// File: percentWhite.java
// Type: java application file
// Date: Sun Oct 22, 2000
// Name: Kara Becker
// Line: Determine the percentage of white space on a die+
using functional application architecture.
// Application Description
// ---------------------------------------------------
/*
Determine the percentage of white space on a die using f+
unctional application architecture.
*/
// Required Packages
// ---------------------------------------------------
import blue.io.*;
import blue.shapes.*;
// Application Class
// ---------------------------------------------------
class percentWhite
{
static public void main (String args[])
{
double edge = readEdge();
double diameter = determineDiameter(edge);
Square face = new Square(edge);
Circle dot = new Circle(diameter/2.0);
double totalArea = computeTotalArea(face);
double blackArea = computeBlackArea(dot);
double whiteArea = computeWhiteArea(totalArea,blackArea);+
double whitePercent = computeWhitePercent(totalArea,white+
Area);
IO.print("The die is ");
IO.print(whitePercent);
IO.println(" percent white.");
}
static private final int nrFaces = 6;
static private final int nrDots = 21;
static private double readEdge()
{
IO.print("The edge is? ");
return IO.read_double();
}
static private double determineDiameter(double edge)
{
double diameter = edge * (1.0 / 5.0);
return diameter;
}
static private double computeTotalArea(Square face)
{
double ta = face.area() * nrFaces;
return ta;
}
static private double computeBlackArea(Circle dot)
{
double ba = dot.area() * nrDots;
return ba;
}
static private double computeWhiteArea(double totalAre+
a,double blackArea)
{
return totalArea - blackArea;
}
static private double computeWhitePercent(double total+
Area,double whiteArea)
{
return (whiteArea / totalArea) * 100.0;
}
}
// Demo
// ---------------------------------------------------
/*
$ javac percentWhite.java
$ java percentWhite
The edge is? 1.79
The die is 89.00442571243572 percent white.
$ javac percentWhite.java
$ java percentWhite
The edge is? 5.43
The die is 89.00442571243572 percent white.
$
*/
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