import java.text.DecimalFormat;
import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;

/**
* The PentagonalPyramidList2 class is used to store a list of PentagonalPyramid
* objects. This class provides methods to get the details of all the
* PentagonalPyramid objects in it, taken as a whole (total surface area, total
* volume, average surface area, and average volume, etc.). Also it provides
* methods to create a new PentagonalPyramidList2 by reading an input text file
* and add/edit/delete/find PentagonalPyramid objects in the list.
*
*/
public class PentagonalPyramidList2 {

private String listName;
private PentagonalPyramid[] pyramidsList;
private int noOfPyramids;

/**
* This constructor is used to create a PentagonalPyramidList2 with a given
* name, an array of PentagonalPyramid objects and the number of
* PentagonalPyramid objects in the array.
*
* @param tag       the tag name used to identify the PentagonalPyramidList2
* @param list    an array of PentagonalPyramid objects
* @param listSize the number of pyramids in the array of
                     PentagonalPyramid objects
*/
public PentagonalPyramidList2(String tag, PentagonalPyramid[] list, int listSize) {
   listName = tag;
   pyramidsList = list;
   noOfPyramids = listSize;
}

/**
* This method is used to get the name of the PentagonalPyramidList2.
*
* @return the name of the PentagonalPyramidList2
*/
public String getName() {
   return listName;
}

/**
* This method is used to get the number of PentagonalPyramid objects in the
* PentagonalPyramidList2.
*
* @return the number of PentagonalPyramids in PentagonalPyramidList2
*/
public int numberOfPentagonalPyramids() {
   return noOfPyramids;
}

/**
* This method is used to get the total surface area for all the
* PentagonalPyramid objects in the PentagonalPyramidList2.
*
* @return the total surface area for all PentagonalPyramids in list
*/
public double totalSurfaceArea() {
   double totalArea = 0;

   // iterate through pyramidsList to add up the surface area of each
   // PentagonalPyramid to obtain the total surface area
   for (int i = 0; i < noOfPyramids; i++) {
      totalArea += pyramidsList[i].surfaceArea();
   }

   return totalArea;
}

/**
* This method is used to get the total volume for all the PentagonalPyramid
* objects in the PentagonalPyramidList2.
*
* @return the total volume for all PentagonalPyramids in list
*/
public double totalVolume() {
   double totalVolume = 0;

   // iterate through pyramidsList to add up the volume of each
   // PentagonalPyramid to obtain the total volume
   for (int i = 0; i < noOfPyramids; i++) {
      totalVolume += pyramidsList[i].volume();
   }

   return totalVolume;
}

/**
* This method is used to get the average surface area for all the
* PentagonalPyramid objects in the PentagonalPyramidList2. If there
* are no PentagonalPyramids in the list, zero is returned.
*
* @return the average surface area for all PentagonalPyramids in list
*/
public double averageSurfaceArea() {
   if (numberOfPentagonalPyramids() > 0) {
      return totalSurfaceArea() / numberOfPentagonalPyramids();
   } else {
      return 0;
   }
}

/**
* This method is used to get the average volume for all the
* PentagonalPyramid objects in the PentagonalPyramidList2. If there
* are no PentagonalPyramids in the list, zero is returned.
*
* @return the average volume for all PentagonalPyramids in list
*/
public double averageVolume() {
   if (numberOfPentagonalPyramids() > 0) {
      return totalVolume() / numberOfPentagonalPyramids();
   } else {
      return 0;
   }
}

/**
* This method is used to get a String containing the list name followed by
* each PentagonalPyramid in the list.
*
* @return a String with list name and all the PentagonalPyramids in
*       PentagonalPyramidList2
*
*/
public String toString() {
   String finalString = getName() + "\n";

   // iterate through pyramidsList to append the details of each
   // PentagonalPyramid to the finalString
   int i = 0;
   while (i < noOfPyramids) {
      finalString += "\n" + pyramidsList[i].toString() + "\n";
      i++;
   }

   return finalString;
}

/**
* This method is used to get a String containing the summary of the list.
* The summary contains the list name followed by number of PentagonalPyramid
* objects, total surface area, total volume, average surface area, and
* average volume.
*
* @return a String containing the summary of the PentagonalPyramidList2
*
*/
public String summaryInfo() {
   DecimalFormat df = new DecimalFormat("#,##0.0##");

   return "----- Summary for " + getName() + " -----"
         + "\nNumber of PentagonalPyramid: " + numberOfPentagonalPyramids()
         + "\nTotal Surface Area: " + df.format(totalSurfaceArea())
         + "\nTotal Volume: " + df.format(totalVolume())
         + "\nAverage Surface Area: " + df.format(averageSurfaceArea())
         + "\nAverage Volume: " + df.format

Exercise 1 PART A. Write a program NumberShape that asks the user...