Question

Desing three classes A class named PropertyforRent to hold the following data: id: address totalRent indicates the expenses of a property, including rent and other expenses Design a class name HouseforRent extends from propertyforRent with following data: waterBill electricityBill gasBill

Answer 1

/*
* Class PropertyforRent with its data variable including id,address and total rent
* */

class PropertyforRent
{
int id   ;
String address;
double totalRent;

// Constructor for PropertyforRent which initialize its Properties like Id, Address, totalRent
PropertyforRent(int x,String y,double z)  
{
  
id=x;
address=y;
totalRent=z;
  
  
}
  
}

//Class HouseforRent
class HouseforRent extends PropertyforRent implements Comparable
{
//properties of HouseforRent
double waterBill;
double electricityBill;
double gasBill;
/*Constructor of HouseforRent which initialize its properties
* It is derived class so its is necessary to call base constructor at very first line
* in its own constructor
*
* */
public HouseforRent(double x,double y,double z,int id,String address)
{    
//Calling base class constructor(with id,address and rent which include all expenses).This is the reason I use (x+y+z) as third parameter.  
   super(id,address,x+y+z);

   waterBill=x;
   electricityBill=y;
   gasBill=z;
  
}
//It is comparable interface method which needs to be implemented
public int compareTo(Object obj)
{
//Compare on the basis of rent only
   HouseforRent h=(HouseforRent)obj;
   if(this.totalRent<h.totalRent) //rent
   return 1;
   else
   return 0;
  
  
}

//this method in built call comparable method to compare objects of two property
boolean isCheaper(HouseforRent h)
{
   if(this.compareTo(h)==1)
   return true;
   else
       return false;
      
}
  
}

/*
* Class CondoforRent
* */
class CondoforRent extends PropertyforRent implements Comparable
{
//properties of CondoforRent  
double maintenance;
double electricity;

/*Constructor of CondoforRent which initialize its properties
* It is derived class so its is necessary to call base constructor at very first line
* in its own constructor
*
* */  
public CondoforRent(double x,double y,int id,String address)  
{
//Calling base class constructor(with id,address and rent which include all expenses).This is the reason I use (x+y) as third parameter.  

   super(id,address,x+y);
  
   maintenance=x;
   electricity=y;
  
}
//It is comparable interface method which needs to be implemented

public int compareTo(Object obj)
{
   CondoforRent c=(CondoforRent)obj;
   if(this.totalRent<c.totalRent)
   return 1;
   else
   return 0;
  
  
}

//this method in built call comparable method to compare objects of two property

boolean isCheaper(CondoforRent c)
{
   if(this.compareTo(c)==1)
   return true;
   else
       return false;
      
}

}

//This is Test Class
public class Test {
   public static void main(String[] args)
   {
//Creating two HouseProperty Objects
   HouseforRent h1=new HouseforRent(20,20,20,1,"Delhi");  
   HouseforRent h2=new HouseforRent(30,20,500,1,"Chandigarh");  
//comparing 2 objects
   if(h1.isCheaper(h2)==true)
   {
       System.out.println("HouseProperty1 of rent "+h1.totalRent+" is cheaper than HouseProperty2");
   }
   else
       System.out.println("HouseProperty2 of rent "+h2.totalRent+" is cheaper than HouseProperty1");
//Creating two CondoforRent property objects
   CondoforRent c1=new CondoforRent(20,20,1,"Delhi");
   CondoforRent c2=new CondoforRent(20,50,1,"Chandigarh");
  
//comparing 2 objects
  
   if(c1.isCheaper(c2)==true)
   {
       System.out.println("CondoProperty1 of rent "+c1.totalRent+" is cheaper than CondoProperty2");
   }
   else
       System.out.println("CondoProperty2 of rent "+c2.totalRent+" is cheaper than CondoProperty1");

  
   }
}

Console <terminated> test [Java Application] C:\Program Files Javaljre6bin javaw.exe (Dec 19, 2015 4:14:52 PM) ousePropertyl of rent 60.0 is cheaper than HouseProperty2 ondoPropertyl of rent 40.0 is cheaper than CondoProperty2