In Java, Write a class encapsulating the concept of a home, assuming that it has

ID: 3567768 • Letter: I

Question

In Java, Write a 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 the file as objects, outputs a description of each 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

Client.java

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;

public class Client {

   public static void main(String[] args) throws IOException {
BufferedReader bfr;
String line;
bfr=new BufferedReader(new InputStreamReader(System.in));

/* creating 5 house objects */
Home[] homes = new Home[]
       {
           new Home(4, 120, true),
           new Home(4, 100, true),
           new Home(2, 240, false),
           new Home(5, 100, true),
           new Home(1, 200, false)
       };

/*create text file homes.txt to store house details */
String fileName="homes.txt";
File file=new File(fileName);
if(!file.exists()){
file.createNewFile();
}
try{
bfr=new BufferedReader(new FileReader(file));

FileWriter fw=new FileWriter(file);
for(int i=0;i<5;i++){
fw.append(String.valueOf(homes[i].numberOfRooms)+" ");
fw.append(String.valueOf(homes[i].squareFootage)+" ");
fw.append(String.valueOf(homes[i].hasBasement)+" ");
}

bfr.close();
fw.close();

}catch(FileNotFoundException fex){
fex.printStackTrace();
}


/*House detail fetch to an array list*/
ArrayList<Home> newHome = new ArrayList<Home>();

if(!file.exists()){
file.createNewFile();
}
try{
bfr=new BufferedReader(new FileReader(file));

while((line=bfr.readLine())!=null){

   newHome.add(new Home
           (
                   Integer.parseInt(line),
                   Integer.parseInt(bfr.readLine()),
                   Boolean.parseBoolean(bfr.readLine())
           ));
}
bfr.close();

}catch(FileNotFoundException fex){
fex.printStackTrace();
}

/*print house detail*/
int i=0;
for (Home home : newHome) {
           System.out.println("House "+(++i)+" : "+home.toString());
       }

}
}

---------------------------------------------------------------------------------------

Home.java

public class Home {
   public int numberOfRooms;
   public int squareFootage;
   public boolean hasBasement;

   public Home(int n, int s, boolean b)
   {
       numberOfRooms = n;
       squareFootage = s;
       hasBasement = b;
   }

   public String toString() {
       String str = "It has "+numberOfRooms+" rooms and is of "+squareFootage+ " square footage with ";

       if(hasBasement)
           str+= "basement";
       else
           str+= "NO basement";
       return str;

   }
}

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