Question

How to solve and code the following requirements (below) using the JAVA program?

1. Modify the FoodProduct Class to implement Edible, add the @Overrride before any methods that were there (get/set methods) that are also in the Edible interface.

2. Modify the CleaningProduct Class to implement Chemical, add the @Overrride before any methods that were there (get/set methods) that are also in the Chemical interface.

3. Create main class to read products from a file, instantiate them, load them into an ArrayList and then print them to the console.

4. The last element are the allergens that you will have to store to an ArrayList.

5. Please show the screenshot of the output.

1. Product.java

public abstract class Product {
    // attributes
   private String name;
    private int sku;
    private double price;

    // constructor
   public Product(String name, int sku, double price) {
        this.name = name;
        this.sku = sku;
        this.price = price;
    }


    // getters ans setters
   public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getSku() {
        return sku;
    }

    public void setSku(int sku) {
        this.sku = sku;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    // toString override
   @Override
    public String toString() {
        return "Product{" +
                "name='" + name + '\'' +
                ", sku=" + sku +
                ", price=" + price +
                '}';
    }
}

2. FoodProduct.java

import java.util.ArrayList;

import java.util.Date;



public class FoodProduct extends Product {



    // constructors

    public FoodProduct(String name, int sku, double price, Date expDate, int refrigeration, int servingSize, int caloriesPerServing, ArrayList allergens) {

        super(name, sku, price);

        this.expDate = expDate;

        this.refrigeration = refrigeration;

        this.servingSize = servingSize;

        this.caloriesPerServing = caloriesPerServing;

        this.allergens = allergens;

    }



    // attributes

    private Date expDate;

    private int refrigeration;

    private int servingSize;

    private int caloriesPerServing;

    private ArrayList allergens;





    // getters and setters

    public Date getExpDate() {

        return expDate;

    }



    public void setExpDate(Date expDate) {

        this.expDate = expDate;

    }



    public int getRefrigeration() {

        return refrigeration;

    }



    public void setRefrigeration(int refrigeration) {

        this.refrigeration = refrigeration;

    }



    public int getServingSize() {

        return servingSize;

    }



    public void setServingSize(int servingSize) {

        this.servingSize = servingSize;

    }



    public int getCaloriesPerServing() {

        return caloriesPerServing;

    }



    public void setCaloriesPerServing(int caloriesPerServing) {

        this.caloriesPerServing = caloriesPerServing;

    }



    public ArrayList getAllergens() {

        return allergens;

    }



    public void setAllergens(ArrayList allergens) {

        this.allergens = allergens;

    }





    // toString override

    @Override

    public String toString() {

        return "FoodProduct{" +

                super.toString() +

                "expDate=" + expDate +

                ", refrigeration=" + refrigeration +

                ", servingSize=" + servingSize +

                ", caloriesPerServing=" + caloriesPerServing +

                ", allergens=" + allergens +

                '}';

    }

}

3. CleaningProduct.java

import java.util.ArrayList;



public class CleaningProduct extends Product {



   // constructors

    public CleaningProduct(String name, int sku, double price, String chemicalName, String hazards, String precautions, String firstAid, ArrayList uses) {

        super(name, sku, price);

        this.chemicalName = chemicalName;

        this.hazards = hazards;

        this.precautions = precautions;

        this.firstAid = firstAid;

        this.uses = uses;

    }



    // attributes

    private String chemicalName;

    private String hazards;

    private String precautions;

    private String firstAid;

    private ArrayList uses;





    // getters and setters

    public String getChemicalName() {

        return chemicalName;

    }



    public void setChemicalName(String chemicalName) {

        this.chemicalName = chemicalName;

    }



    public String getHazards() {

        return hazards;

    }



    public void setHazards(String hazards) {

        this.hazards = hazards;

    }



    public String getPrecautions() {

        return precautions;

    }



    public void setPrecautions(String precautions) {

        this.precautions = precautions;

    }



    public String getFirstAid() {

        return firstAid;

    }



    public void setFirstAid(String firstAid) {

        this.firstAid = firstAid;

    }



    public ArrayList getUses() {

        return uses;

    }



    public void setUses(ArrayList uses) {

        this.uses = uses;

    }



    // toString override





    @Override

    public String toString() {

        return "CleaningProduct{" +

                super.toString() +

                "chemicalName='" + chemicalName + '\'' +

                ", hazards='" + hazards + '\'' +

                ", precautions='" + precautions + '\'' +

                ", firstAid='" + firstAid + '\'' +

                ", uses=" + uses +

                '}';

    }

}

4. Edible-Interface

import java.util.ArrayList;

import java.util.Date;





public interface Edible {



    public Date getExpDate();

    public void setRefrigerationTemp(int refrigerationTemp);

    public int getRefrigerationTemp();

    public void setExpDate(Date expDate);

    public int getServingSize();

    public void setServingSize(int servingSize);

    public int getCaloriesPerServing();

    public void setCaloriesPerServing(int caloriesPerServing);

    public String getAllergens();

    public void setAllergens(ArrayList<String>allergens);



}

5. Chemical-Interface

import java.util.ArrayList;



public interface Chemical {



    public String getChemicalName();

    public void setChemicalName(String chemicalName);

    public String getHazards();

    public void setHazards(String hazards);

    public String getPrecautions();

    public void setPrecautions(String precautions);

    public ArrayList<String> getUses();

    public void setUses(ArrayList<String> uses );

    public String getFirstAid();

    public void setFirstAid(String firstAid);



}

6. Main

import java.io.*;

import java.text.DateFormat;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.Formatter;

import java.util.Scanner;

import java.util.ArrayList;



public class ProductMain {



    public static void main (String[] args) throws FileNotFoundException{

        File fileInput = new File ("src/FoodProduct");

        Scanner sc = new Scanner(fileInput);



        String name; // product

        String sku;  // product

        double price; // product



        Date expDate = new Date(); // food product

        int refrigerationTemperature; // food product

        int servingSize; // food product

        int caloriesPerServing; // food product



        ArrayList allergens = new ArrayList<String>();

        while(sc.hasNextLine()){

            String line = sc.nextLine();

            String[] productSpec = line.split(",");

            name = productSpec[0];

            sku = productSpec[1];

            price = Double.parseDouble(productSpec[2]);



            String testDate = productSpec[3];

            SimpleDateFormat formatter = new SimpleDateFormat("MM/yyyy");

            formatter.format(expDate);



            refrigerationTemperature = Integer.parseInt(productSpec[4]);

            servingSize = Integer.parseInt(productSpec[5]);

            caloriesPerServing = Integer.parseInt(productSpec[6]);



            if(productSpec.length > 5){

                for (int i=7; i<productSpec.length; i++){

                    allergens.add(productSpec[i]);



                }

            }



            System.out.println( name + " "

                    + sku + " "

                    + price + " "

                    + testDate + " "

                    + refrigerationTemperature + " "

                    + servingSize + " "

                    + caloriesPerServing + " "

                    + allergens + "\n"



            );



        }



    }

}

7. FoodProduct.txt

Frosted Mini Wheats,233345667,4.99,10/2020,70,54,190,Wheat Ingredients

Activa YoCrunch Yogurt,33445654,2.50,10/2018,35,113,90,Dairy,Peanuts

8. CleaningProduct.txt

Lysol,2344454,4.99,Alkyl (50%C14 40%C12 10%C16) dimethyl benzyl ammonium saccharinate,Hazard to humans and domestic animals. Contents under pressure,Causes eye irritation,In case of eye contact immediately flush eyes thoroughly with water, kitchen, bath

Windex,4456765,3.99,Sodium citrate (Trisodium citrate),To avoid electrical shock do not spray at or near electric lines,Undiluted product is an eye irritant, if contact with eye occurs flush immediately with plenty of water for at least 15 to 20 minutes, glass,

upholstery, clothing

Answer 1

Seems all other classes are already implemented except FoodProduct.java. So, posting code of only that class. I haven't made much modifications here, just added 3 @override methods (which were not defined). Rest all methods of Edibile interface were already defined. Infact some of the methods which are similar to the 3 methods which I've added are already implemented. So, I just delegated the method calls to the methods you've already written.

One more change which I did was I added type to the allergens. It was just raw ArrayList which were depreciated long time ago. Use of rawtype is not recommended, so typed the allergens list to String type.

Seems your solution is little messed up. However, the end-to-end program seems to be working fine as I tested with the main program and even got some output. Let me know if you need anymore help on this.

FoodProduct.java

package product;

import java.util.ArrayList;

import java.util.Date;

public class FoodProduct extends Product implements Edible {

// constructors

public FoodProduct(String name, int sku, double price, Date expDate, int refrigeration, int servingSize, int caloriesPerServing, ArrayList<String> allergens) {

super(name, sku, price);

this.expDate = expDate;

this.refrigeration = refrigeration;

this.servingSize = servingSize;

this.caloriesPerServing = caloriesPerServing;

this.allergens = allergens;

}

// attributes

private Date expDate;

private int refrigeration;

private int servingSize;

private int caloriesPerServing;

private ArrayList<String> allergens;

  

  

  

// added these three @override methods here.

@Override

public void setRefrigerationTemp(int refrigerationTemp) {

this.setRefrigerationTemp(refrigerationTemp);

}

@Override

public int getRefrigerationTemp() {

return this.getRefrigerationTemp();

}

@Override

public String getAllergens() {

String allergensString = "";

for(String allergen: this.allergens)

{

allergensString = allergensString + ", " + allergen;

}

return allergensString;

}

// getters and setters

public Date getExpDate() {

return expDate;

}

public void setExpDate(Date expDate) {

this.expDate = expDate;

}

public int getRefrigeration() {

return refrigeration;

}

public void setRefrigeration(int refrigeration) {

this.refrigeration = refrigeration;

}

public int getServingSize() {

return servingSize;

}

public void setServingSize(int servingSize) {

this.servingSize = servingSize;

}

public int getCaloriesPerServing() {

return caloriesPerServing;

}

public void setCaloriesPerServing(int caloriesPerServing) {

this.caloriesPerServing = caloriesPerServing;

}

// public ArrayList getAllergens() {

// return allergens;

// }

public void setAllergens(ArrayList<String> allergens) {

this.allergens = allergens;

}

// toString override

@Override

public String toString() {

return "FoodProduct{" +

super.toString() +

"expDate=" + expDate +

", refrigeration=" + refrigeration +

", servingSize=" + servingSize +

", caloriesPerServing=" + caloriesPerServing +

", allergens=" + allergens +

'}';

}

}

Code screenshots:

Output: