Write a java class encapsulating the concept of a Home, assuming that it has the

Question

Write a java class encapsulating the concept of a Home, assuming that it has the following attributes: the number of rooms, the square footage, and whether it has a basement. Write a client program that creates five home objects, writes them to a file as objects, then reads them from a file as objects, outputs a description of the object using the toString() method (which the Home class should override), and outputs the number of Home objects. When reading the objects, you should assume that you do not know the number of objects in the file.

Explanation / Answer

Home.java

public class Home {
   private int numberOfRooms;
   private double areaInSquarefeet;
   private boolean hasBasement;
  
  
   public Home(int numberOfRooms, double areaInSquarefeet, boolean hasBasement) {
       this.numberOfRooms = numberOfRooms;
       this.areaInSquarefeet = areaInSquarefeet;
       this.hasBasement = hasBasement;
   }
   public int getNumberOfRooms() {
       return numberOfRooms;
   }
   public void setNumberOfRooms(int numberOfRooms) {
       this.numberOfRooms = numberOfRooms;
   }
   public double getAreaInSquarefeet() {
       return areaInSquarefeet;
   }
   public void setAreaInSquarefeet(double areaInSquarefeet) {
       this.areaInSquarefeet = areaInSquarefeet;
   }
   public boolean isHasBasement() {
       return hasBasement;
   }
   public void setHasBasement(boolean hasBasement) {
       this.hasBasement = hasBasement;
   }
  
   @Override
   public String toString()
   {
       String description = "Number of Rooms : "+ numberOfRooms + " SquareFootage : "+areaInSquarefeet + " HasBasement :"+hasBasement;
       return description;
   }
}

ClientHome.java

// Uses Gson external library to convert object to json string and vice-versa

// Download and gson-2.2.jar and add to project build path

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.List;
import java.util.ArrayList;
import java.util.Scanner;

import com.google.gson.Gson;

public class ClientHome {
  
   public static void main(String[] args)
   {
       Home home1 = new Home(2,1500,true);
       Home home2 = new Home(3,2000,true);
       Home home3 = new Home(5,3000,false);
       Home home4 = new Home(1,4500,true);
       Home home5 = new Home(6,5500,false);
      
       List<Home> homes = new ArrayList<Home>();
       homes.add(home1);
       homes.add(home2);
       homes.add(home3);
       homes.add(home4);
       homes.add(home5);
      
       HomeObjectsList listofHomes = new HomeObjectsList();
       listofHomes.setHomes(homes);
      
      
       Gson gson = new Gson();
       String jsonString = gson.toJson(listofHomes);
       final String fileName = "outputfile.txt";
       writeToFile(fileName,jsonString);
      
      
       String jsonStringRead = readFile(fileName);
       HomeObjectsList listOfHomesRead;
       listOfHomesRead = gson.fromJson(jsonStringRead, HomeObjectsList.class);
      
       System.out.println("Number of Home Objects = "+listOfHomesRead.getHomes().size());
       for(Home home : listOfHomesRead.getHomes())
       {
           System.out.println(home.toString());
       }
   }
  
   private static void writeToFile(String fileName,String jsonString)
   {
       boolean fileOpened = true;

       try {
       PrintWriter toFile = new PrintWriter(fileName);

       if(fileOpened){
       toFile.println(jsonString);
       toFile.close();
       }
       }

       catch (FileNotFoundException e) {
       fileOpened = false;
       }
   }
  
   private static String readFile(String fileName)
   {
       StringBuilder builder = new StringBuilder();
       try {
       Scanner fileData = new Scanner(new File(fileName));
      
       while(fileData.hasNextLine()){
       String line = fileData.nextLine();
       line = line.trim();
       builder.append(line);

       if("".equals(line)){
       continue;
       } // end if

       } // end while

       fileData.close(); // close file
       } // end try

       catch (FileNotFoundException e) {
       // Error message
       } // end catch
      
       return builder.toString();
   }

}

HomeObjectsList.java

import java.util.List;

   public class HomeObjectsList
   {
       List<Home> homes;

       public List<Home> getHomes() {
           return homes;
       }

       public void setHomes(List<Home> homes) {
           this.homes = homes;
       }
      
      
   }

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