Write a class Room . A Room class contains an int instance variable for the area

Question

Write a class Room. A Room class contains
an int instance variable for the area (in square feet) of the room
one constructor that takes the area of the room as a parameter
an accessor, int getSquareFeet() that returns the area of the room
an accessor, int getCapacity() that returns the capacity of the room. The capacity is given by dividing the square feet by 9 (using integer division).
an accessor, String toString() that returns the square feet and capacity of the room.

Write a class Classroom that extends Room. A Classroom class contains
an int instance variable for the number of chairs in the classroom
a constructor that takes the area of the classroom as a parameter
a constructor that takes the area of the classroom and the number of chairs as parameters
getter and setter for chairs
an override for getCapacity. The capacity of a classroom is the number of chairs.
an accessor, String toString() that returns the square feet and capacity of the room as well as the number of chairs.

Write a class Elevator that extends Room. An Elevator class contains
an int instance variable for the current floor of the elevator
a constructor that takes the area of the elevator as a parameter
a mutator void up(int floors) that increases the current floor by the parameter
a mutator void down(int floors) that decreases the current floor by the parameter
an accessor String toString() that returns the square feet and capacity of the elevator, as well as its current floor

// // // // // //

Starter code

import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;

public class Building {

   public static void main(String[] args) {
       Scanner kybd = new Scanner(System.in);

       // declare an ArrayList containing Room elements
       Random rand = new Random();

       System.out.println("Enter 1: create classroom 2: create create elevator" + " 3: exit");
       int inp = kybd.nextInt();
       while (inp != 3) {
           if (inp == 1) {
               System.out.println("How many chairs? ");
               int ch = kybd.nextInt();
               Room current = new Classroom(rand.nextInt(1000) + 100, ch);
               // add current to the ArrayList
           } else if (inp == 2) {
               Elevator current = new Elevator(rand.nextInt(100) + 10);
               if (rand.nextInt(2) == 0) {
                   current.up(rand.nextInt(10));
               } else {
                   current.down(rand.nextInt(10));
               }
               // add current to the ArrayList
           }
           System.out.println("Enter 1: create classroom 2: create create elevator" + " 3: exit");
           inp = kybd.nextInt();
       }
       kybd.close();
       // create a for loop to walk through the ArrayList its elements, one per line

   }

}

Explanation / Answer

/***

For Compilation: javac Building.java

For Run :java Building

****/

/**
*
* FileName :Room.java
*/
public class Room {
  
int area;
  
/**
*
* @param area
*/
public Room(int area) {
this.area = area;
}

/**
*
* @return
*/
public int getCapacity() {
  
return getSquareFeet()/9;
}

/**
*
* @return
*/
public int getSquareFeet() {
return area;
}

@Override
public String toString() {
return "area=" + area + "capacity="+getCapacity();
}
  
  
}

/**
*
* FileName: Classroom.java
*/
public class Classroom extends Room {

int numberOfChairs;
  
/**
*
* @param area
*/
public Classroom(int area) {
super(area);
}

/**
*
* @param area
* @param chairs
*/
public Classroom(int area, int chairs) {
super(area);
numberOfChairs = chairs;
}

/**
*
* @return
*/
public int getNumberOfChairs() {
return numberOfChairs;
}

/**
*
* @param numberOfChairs
*/
public void setNumberOfChairs(int numberOfChairs) {
this.numberOfChairs = numberOfChairs;
}

/**
*
* @return
*/
@Override
public int getCapacity() {
return super.getCapacity();
}

  
@Override
public String toString() {
return super.toString()+" Number Of Chair= "+getNumberOfChairs();
}

}

/**
*
* FileName:Elevator.java
*/
class Elevator extends Room {

int currentFloor;

public Elevator(int area) {
super(area);
}

public void up(int up) {
currentFloor = up;
}

public void down(int down) {
currentFloor = down;
}

@Override
public String toString() {
return super.toString() + "currentFloor=" + currentFloor;
}

}

/**
*
* fileName Building.java
*/
import java.util.Random;
import java.util.Scanner;

public class Building {

public static void main(String[] args) {
// declare an ArrayList containing Room elements
try (Scanner kybd = new Scanner(System.in)) {
// declare an ArrayList containing Room elements
Random rand = new Random();
System.out.println("Enter 1: create classroom 2: create create elevator" + " 3: exit");
int inp = kybd.nextInt();
while (inp != 3) {
if (inp == 1) {
System.out.println("How many chairs? ");
int ch = kybd.nextInt();
Room current = new Classroom(rand.nextInt(1000) + 100, ch);
// add current to the ArrayList
} else if (inp == 2) {
Elevator current = new Elevator(rand.nextInt(100) + 10);
if (rand.nextInt(2) == 0) {
current.up(rand.nextInt(10));
} else {
current.down(rand.nextInt(10));
}
// add current to the ArrayList
}
System.out.println("Enter 1: create classroom 2: create create elevator" + " 3: exit");
inp = kybd.nextInt();
}
// create a for loop to walk through the ArrayList its elements, one per line
}
}
}

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