Programming Homework Help

import java.io.*;

public class PetList {

private static final String INPUT_FILE = “./pet_data.csv”;
private static final String OUTPUT_FILE = “./pet_report.txt”;

private static String[] petData;
private static Pet[] pets;
private static int numPets = 0;

public static void main (String[] args) {
retrievePetData();
convertPetDataToPetObjects(petData, pets);
writeOutput();
}

private static void retrievePetData() {
int incrementSize = 5;
petData = new String[incrementSize];

try (BufferedReader br = new BufferedReader(new FileReader(INPUT_FILE))) {
String line;
while ((line = br.readLine()) != null) {
petData[numPets] = line;
numPets++;
if (numPets == petData.length) {
String[] tmpData = new String[petData.length + incrementSize];
for (int idx = 0; idx < petData.length; idx++) {
tmpData[idx] = petData[idx];
}
petData = tmpData;
}
}
br.close();
} catch (Exception e) {
System.out.print(e.getClass().getName() + ” “);
System.out.println(e.getMessage());
}
}

private static void convertPetDataToPetObjects(String [] petData, Pet [] pets) {

}

private static void writeOutput () {
try {
PrintWriter pw = new PrintWriter(new FileOutputStream(OUTPUT_FILE));
writePetObjects(pw);
writePetStatistics(pw);
pw.close();
} catch (Exception e) {
System.out.print(e.getClass().getName() + ” “);
System.out.println(e.getMessage());
}
}

private static void writePetObjects (PrintWriter pw) {
if (pets != null) {
for (Pet aPet: pets) {
if (aPet != null) pw.println(aPet.toString());
}
}
}

private static void writePetStatistics (PrintWriter pw) {
int numberOfCats = 0;
int numberOfDogs = 0;
float averageCatAge = 0.0f;
float averageDogAge = 0.0f;

pw.println(“Number of cats: ” + numberOfCats);
pw.println(“Number of dogs: ” + numberOfDogs);
pw.println(“Average cat age: ” + averageCatAge);
pw.println(“Average dog age: ” + averageDogAge);
}
}

public abstract class Pet

{

}