Question

Create a Java application for Real Estates including Apartment and Homes. First, have a look at the class diagram that you will implement, and then read the explanation of these classes below.

RealEstate (interface) + setId (String s)	Apartment - id: String - surface: double + full argument constructor + getters and setters + setId (String s) + toString(): String
Home - id: String - hasGarage: boolean + full argument constructor + getters and setters + setId (String s) + toString(): String

Class RealEstate

• Real estate is an interface with two abstract methods.

There are two types of real estates: Apartment and Home.

Class Apartment   

• The class Apartment has three attributes: id and surface.

Class Home

• The class Home has three attributes: id and hasGarage.

Test Class

• Create an ArrayList called homes that contains two Home objects    
• Remove the home doesn’t have a Garage.
• Display the homes.

Information about objects are presented in what follows.

Home Objects

ID	hasGarage
H1234	No
H1235	Yes

• Create an LinkedList called apart that contains three Apartment objects
• Display the apart LinkedList

Information about objects are presented in what follows.

Apartment Objects

ID	Surface
A1234	125
A1235	205
A1236	200

• Create a TreeSet called treeSurface that contains the surfaces of all the apartments.

Recall that: SortedSet <Double> treeSurface = new TreeSet<Double> ();

• Display treeSurface
• Display the smallest and largest surfaces.

Answer 1

java code

import java.util.*;
interface RealEstate
{
public void setId(String s);
}

class Apartment implements RealEstate
{
String id;
double surface;
public Apartment(String id, double surface)
{
this.id = id;
this.surface = surface;
}
public String getId()
{
return this.id;
}
public void setId(String s)
{
this.id = s;
}
public double getSurface()
{
return this.surface;
}
public void setSurface(double s)
{
this.surface = s;
}
public String toString()
{
return getId()+" "+getSurface()+"\n";
}
}

class Home implements RealEstate
{
String id;
boolean hasGarage;
public Home(String id, boolean hasGarage)
{
this.id = id;
this.hasGarage= hasGarage;
}
public String getId()
{
return this.id;
}
public void setId(String s)
{
this.id = s;
}
  
public boolean getHasGarage()
{
return this.hasGarage;
}
  
public void setHasGarage(boolean hasGarage)
{
this.hasGarage = hasGarage;
}
public String toString()
{
if (getHasGarage()==true)
return getId() +" Yes\n";
else
return getId() + " No\n";
}
}

public class Main
{
   public static void main(String[] args) {
   //Test part
       ArrayList<Home> homes = new ArrayList<Home>();
       homes.add(new Home("H1234",false));
       homes.add(new Home("H1235",true));
       System.out.println("Id hasGarage");
       System.out.println(homes.toString());
       for (int i = 0; i < homes.size(); i++)
       {
       if (homes.get(i).getHasGarage()==false)
       homes.remove(i);
       }
       System.out.println("Id hasGarage");
       System.out.println(homes.toString());
      
       LinkedList<Apartment> apart = new LinkedList<Apartment>();
       apart.add(new Apartment("A1234",125));
       apart.add(new Apartment("A1235",205));
       apart.add(new Apartment("A1236",200));
       System.out.println("Id Surface");
       System.out.println(apart.toString());
       SortedSet<Double> treeSurface = new TreeSet<Double>();
       for (int i = 0; i < apart.size(); i++)
       {
       treeSurface.add(apart.get(i).getSurface());
       }
       System.out.println(treeSurface.first());
       System.out.println(treeSurface.last());
   }
}

Output

Id hasGarage                                                       

[H1234 No                                                          

, H1235 Yes                                                        

]                                                                  

Id hasGarage                                                       

[H1235 Yes                                                         

]                                                                  

Id Surface                                                         

[A1234 125.0                                                       

, A1235 205.0                                                      

, A1236 200.0                                                      

]                                                                  

125.0                                                              

205.0