Functional Application Architecture

class LineOfSquaresFAA
{
// main method
   static public void main (String args[])
   {
      int nrSquares = readSquareLength();
      double lineArea = readLineArea();
      double squareArea = squareArea(lineArea, nrSquares);
      double squareSide = squareSide(squareArea);
      int eeCount = eeCount(nrSquares);
      double perimeter = perimeter(squareSide, eeCount);
      IO.print("The perimeter of the line of squares is ");
      IO.println(perimeter); 
   }

// other methods

   static private int readSquareLength()
   {
      IO.print("How many squares in the line? ");
      return IO.read_int();
   }   

   static private double readLineArea()
   {
      IO.print("What is the area of the line of squares? ");       
      return IO.read_double();
   }   

   static private double squareArea(double la, int n)
   {
      return ( la / n );
   }

   static private double squareSide(double sa)
   {
      return Math.sqrt(sa);     
   }
      
   static private int eeCount(int n)
   {
      return ( ( n * 2 ) + 2 );
   }
      
   static private double perimeter(double ss, int ee)
   {
      return ( ss * ee );   
   }
}