Question

Design classes that store the information about various pieces of furniture. The system will support at least these pieces: table, chair and lamp. For each piece of furniture, the system will store some attributes. For a table, it will be at least width, length, height, photo and price. For a chair, it will be at least price, photo, height and diagonal. For a lamp, it will be at least the number of bulbs, photo and price. Each piece of furniture will provide a method that prints all the information about that piece. For example, a chair will be printed as follows:

Chair, id: 1, photo: chair1.png, price: 11.99, diagonal: 6, height: 12

A table will be printed as follows: Table, id: 2, photo: table1.png, price: 12.48, width: 10, length: 12, height: 8

And a lamp as follows: Lamp, id: 3, photo: lamp1.png, price: 8.75, bulbs: 2

Besides the individual pieces, the system will support sets of pieces. Each set will have a name, any number of pieces of furniture, and a price and will provide a method that prints all the information about that set. For example, a kitchen set will be printed as follows:

Kitchen (set) Table, id: 4, photo: table2.png, width: 11, length: 16, height: 25 Chair, id: 5, photo: chair2.png, diagonal: 5, height: 10 Chair, id: 5, photo: chair2.png, diagonal: 5, height: 10 price: 25.99

Each class will provide suitable constructors and methods. Each piece of furniture will have a unique ID that will be assigned automatically.

java programming

Answer 1

Short Summary:

• Implemented the given problem using OOP
• Provided you the UML diagram which explains class structure
• The common characterstics should be placed in an abstract class, then child classes should inherit the parent class and implement the abstract methods.
• set class has list of furnitures and print method
• Shown you sample test driver and sample test run.

UML Diagram:

Source Code:

furniture.java File:

public abstract class furniture {
   private int ID;
   private static int numberOfObject;
   private String photo;
   private double price;

   /**
   *
   */
   public furniture() {
       numberOfObject++;
       this.ID = numberOfObject;
   }

   /**
   * @return the photo
   */
   protected String getPhoto() {
       return photo;
   }

   /**
   * @param photo the photo to set
   */
   protected void setPhoto(String photo) {
       this.photo = photo;
   }

   /**
   * @return the price
   */
   protected double getPrice() {
       return price;
   }

   /**
   * @param price the price to set
   */
   protected void setPrice(double price) {
       this.price = price;
   }

   /**
   * @return the iD
   */
   protected int getID() {
       return ID;
   }
  
   // abstract method to be overriden in child class
   public abstract void printInfo();
  
}

table.java File:

public class table extends furniture{
   private int width;
   private int length;
   private int height;
   /**
   * @param width
   * @param length
   * @param height
   */
   public table(int width, int length, int height, String photo, double price) {
       super();
       this.width = width;
       this.length = length;
       this.height = height;
       super.setPhoto(photo);
       super.setPrice(price);
   }
  
   // Print table info
   @Override
   public void printInfo() {
       System.out.println("Table, id: " +super.getID() + ", photo: " + super.getPhoto() + ", price: " + super.getPrice()
           + ", width: " + this.width + ", length: " + this.length + ", height: " + this.height);
      
   }
}

chair.java File:

public class chair extends furniture {
   private int height;
   private int diagonal;
  
   /**
   * @param height
   * @param diagonal
   */
   public chair(int height, int diagonal, String photo, double price) {
       super();
       this.height = height;
       this.diagonal = diagonal;
       super.setPhoto(photo);
       super.setPrice(price);
   }

   @Override
   public void printInfo() {
       System.out.println("Chair, id: " + super.getID() + ", photo: " + super.getPhoto() + ", price: " +
               super.getPrice() + ", diagonal: " + this.diagonal + ", height: " + this.height);
      
   }
  
  
}

lamp.java File:
public class lamp extends furniture {
   private int numberOfBulbs;

   /**
   * @param numberOfBulbs
   */
   public lamp(int numberOfBulbs, String photo, double price) {
       super();
       this.numberOfBulbs = numberOfBulbs;
       super.setPhoto(photo);
       super.setPrice(price);
   }

   @Override
   public void printInfo() {
       System.out.println("Lamp, id: " + super.getID() + ", photo: " + super.getPhoto() + ", price: " + super.getPrice() +
               ", bulbs: " + this.numberOfBulbs);
   }
}

set.java File:

import java.util.ArrayList;

public class set {
   private ArrayList<furniture> furnitures;

   /**
   *
   */
   public set() {
       super();
       furnitures = new ArrayList<furniture>();
   }
  
   public void addFurniture(furniture f) {
       furnitures.add(f);
   }
  
   public void printSet() {
       for(furniture f : furnitures) {
           f.printInfo();
       }
   }
}

furnitureTest.java File:
public class furnitureTest {

   public static void main(String[] args) {
       chair c = new chair(12, 6, "chair1.png", 11.99);
       table t = new table(10, 12, 8, "table1.png", 12.48);
       lamp l = new lamp(2, "lamp1.png", 8.75);
      
       set kitchenSet = new set();
       kitchenSet.addFurniture(c);
       kitchenSet.addFurniture(t);
       kitchenSet.addFurniture(l);
       kitchenSet.printSet();

   }

}

Sample Run:

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