Design Patterns: Strategy Pattern : in Object Oriented design Programming Use Netbeans to execute the following Java code and show SCREENSHOTS to verify that the program runs correctly. Draw a UMl class diagram to model the program. Here is the java code: File : Billing.java public interface Billing { public double getDiscount();} File : LoyaltyBilling.java public class LoyaltyBilling implements Billing{ @Override public double getDiscount() { return 20.00; } } File : NormalBilling.java public class NormalBilling implements Billing{ @Override public double getDiscount() { return 0; } } File : SeasonalBilling.java public class SeasonalBilling implements Billing{ @Override public double getDiscount() { return 10; } } File :SaleBilling.java public class SaleBilling implements Billing{ @Override public double getDiscount() { return 50; } } File : Product.java public class Product { private String name; private double price; public Product(String name, double price) { this.name = name; this.price = price; } public String getName() { return name; } public double getPrice() { return price; } public void setName(String name) { this.name = name; } public void setPrice(double price) { this.price = price; } } File: Sale.java import java.util.ArrayList; public class Sale { private Billing billing; private ArrayList<Product> products; public Sale(Billing billing, ArrayList<Product> products) { this.billing = billing; this.products = products; } public double getDiscountPercentage(){ return billing.getDiscount(); } public double calculateCost() { double total = 0; for(int i=0; i<products.size();i++){ total = total+products.get(i).getPrice(); } total = total - (getDiscountPercentage()/100)*total; return total; }} File: Shop.java import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.Scanner; public class Shop { Product[] shopProducts; Sale newSale; Scanner in = new Scanner(System.in); public void initilaizeProducts(){ shopProducts = new Product[10]; shopProducts[0] = new Product("Rice", 10); shopProducts[1] = new Product("Sugar", 8); shopProducts[2] = new Product("Pasta", 2); shopProducts[3] = new Product("Coffee", 3); shopProducts[4] = new Product("Tea", 3); shopProducts[5] = new Product("Banana", 10); shopProducts[6] = new Product("Onion", 8); shopProducts[7] = new Product("Cucumber", 2); shopProducts[8] = new Product("Carrot", 3); shopProducts[9] = new Product("Chilly", 3); } public void startBilling(){ System.out.print("Enter date:(dd/mm/yyyy): "); String date = in.next(); try { Date date1=new SimpleDateFormat("dd/MM/yyyy").parse(date); } catch (ParseException ex) { System.err.println("Error in date entry"); } ArrayList<Product> scannedProducts = new ArrayList<Product>(); System.out.println("PRODUCTS"); for(int i=0;i<shopProducts.length;i++){ System.out.println(" "+(i+1)+". "+shopProducts[i].getName()+" $"+shopProducts[i].getPrice()); } System.out.println(" "+(shopProducts.length+1)+". Exit"); int choice; do{ System.out.print("Enter choice: "); choice = in.nextInt(); if(choice<1 || choice>(shopProducts.length)) break; scannedProducts.add(shopProducts[choice-1]); }while(choice>0 && choice<(shopProducts.length+1)); System.out.println("Select billing"); System.out.println("1. Loyalty Billing"); System.out.println("2. Normal Billing"); System.out.println("3. Seasonal Billing"); System.out.println("4. Sale Billing"); choice = in.nextInt(); switch(choice){ case 1: newSale = new Sale(new LoyaltyBilling(), scannedProducts); break; case 2: newSale = new Sale(new NormalBilling(), scannedProducts); break; case 3: newSale = new Sale(new SeasonalBilling(), scannedProducts); break; case 4: newSale = new Sale(new SaleBilling(), scannedProducts); break; default: System.out.println("Invalid entry"); } System.out.printf("Total Cost: $%.2f",newSale.calculateCost()); } public static void main(String[] args) { Shop s = new Shop(); s.initilaizeProducts(); s.startBilling(); }}

Design Patterns: Strategy Pattern : in Object Oriented design Programming Use Netbeans to execute the following Java code and show SCREENSHOTS to verify that the program runs correctly. Draw a UMl class diagram to model the program. Here is the java code: File : Billing.java public interface Billing { public double getDiscount();} File : LoyaltyBilling.java public class LoyaltyBilling implements Billing{ @Override public double getDiscount() { return 20.00; } } File : NormalBilling.java public class NormalBilling implements Billing{ @Override public double getDiscount() { return 0; } } File : SeasonalBilling.java public class SeasonalBilling implements Billing{ @Override public double getDiscount() { return 10; } } File :SaleBilling.java public class SaleBilling implements Billing{ @Override public double getDiscount() { return 50; } } File : Product.java public class Product { private String name; private double price; public Product(String name, double price) { this.name = name; this.price = price; } public String getName() { return name; } public double getPrice() { return price; } public void setName(String name) { this.name = name; } public void setPrice(double price) { this.price = price; } } File: Sale.java import java.util.ArrayList; public class Sale { private Billing billing; private ArrayList<Product> products; public Sale(Billing billing, ArrayList<Product> products) { this.billing = billing; this.products = products; } public double getDiscountPercentage(){ return billing.getDiscount(); } public double calculateCost() { double total = 0; for(int i=0; i<products.size();i++){ total = total+products.get(i).getPrice(); } total = total - (getDiscountPercentage()/100)*total; return total; }} File: Shop.java import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.Scanner; public class Shop { Product[] shopProducts; Sale newSale; Scanner in = new Scanner(System.in); public void initilaizeProducts(){ shopProducts = new Product[10]; shopProducts[0] = new Product("Rice", 10); shopProducts[1] = new Product("Sugar", 8); shopProducts[2] = new Product("Pasta", 2); shopProducts[3] = new Product("Coffee", 3); shopProducts[4] = new Product("Tea", 3); shopProducts[5] = new Product("Banana", 10); shopProducts[6] = new Product("Onion", 8); shopProducts[7] = new Product("Cucumber", 2); shopProducts[8] = new Product("Carrot", 3); shopProducts[9] = new Product("Chilly", 3); } public void startBilling(){ System.out.print("Enter date:(dd/mm/yyyy): "); String date = in.next(); try { Date date1=new SimpleDateFormat("dd/MM/yyyy").parse(date); } catch (ParseException ex) { System.err.println("Error in date entry"); } ArrayList<Product> scannedProducts = new ArrayList<Product>(); System.out.println("PRODUCTS"); for(int i=0;i<shopProducts.length;i++){ System.out.println(" "+(i+1)+". "+shopProducts[i].getName()+" $"+shopProducts[i].getPrice()); } System.out.println(" "+(shopProducts.length+1)+". Exit"); int choice; do{ System.out.print("Enter choice: "); choice = in.nextInt(); if(choice<1 || choice>(shopProducts.length)) break; scannedProducts.add(shopProducts[choice-1]); }while(choice>0 && choice<(shopProducts.length+1)); System.out.println("Select billing"); System.out.println("1. Loyalty Billing"); System.out.println("2. Normal Billing"); System.out.println("3. Seasonal Billing"); System.out.println("4. Sale Billing"); choice = in.nextInt(); switch(choice){ case 1: newSale = new Sale(new LoyaltyBilling(), scannedProducts); break; case 2: newSale = new Sale(new NormalBilling(), scannedProducts); break; case 3: newSale = new Sale(new SeasonalBilling(), scannedProducts); break; case 4: newSale = new Sale(new SaleBilling(), scannedProducts); break; default: System.out.println("Invalid entry"); } System.out.printf("Total Cost: $%.2f",newSale.calculateCost()); } public static void main(String[] args) { Shop s = new Shop(); s.initilaizeProducts(); s.startBilling(); }}

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Design Patterns: Strategy Pattern : in Object Oriented design Programming

Use Netbeans to execute the following Java code and show SCREENSHOTS to verify that the program runs correctly.

Draw a UMl class diagram to model the program.

Here is the java code:

File : Billing.java

public interface Billing {

public double getDiscount();
}

File : LoyaltyBilling.java

public class LoyaltyBilling implements Billing{

    @Override
    public double getDiscount() {
        return 20.00;
    }

}

File : NormalBilling.java

public class NormalBilling implements Billing{

    @Override
    public double getDiscount() {
        return 0;
    }

}

File : SeasonalBilling.java

public class SeasonalBilling implements Billing{

    @Override
    public double getDiscount() {
        return 10;
    }

}

File :SaleBilling.java

public class SaleBilling implements Billing{

    @Override
    public double getDiscount() {
        return 50;
    }

}

File : Product.java

public class Product {
private String name;
private double price;

    public Product(String name, double price) {
        this.name = name;
        this.price = price;
    }

    public String getName() {
        return name;
    }

    public double getPrice() {
        return price;
    }

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

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

}

File: Sale.java

import java.util.ArrayList;

public class Sale {

private Billing billing;
private ArrayList<Product> products;

    public Sale(Billing billing, ArrayList<Product> products) {
        this.billing = billing;
        this.products = products;
    }

    public double getDiscountPercentage(){
        return billing.getDiscount();
    }

    public double calculateCost() {
        double total = 0;
        for(int i=0; i<products.size();i++){
            total = total+products.get(i).getPrice();
        }
        total = total - (getDiscountPercentage()/100)*total;
        return total;
    }
}

File: Shop.java

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Scanner;

public class Shop {
    Product[] shopProducts;
    Sale newSale;
    Scanner in = new Scanner(System.in);

    public void initilaizeProducts(){
        shopProducts = new Product[10];
        shopProducts[0] = new Product("Rice", 10);
        shopProducts[1] = new Product("Sugar", 8);
        shopProducts[2] = new Product("Pasta", 2);
        shopProducts[3] = new Product("Coffee", 3);
        shopProducts[4] = new Product("Tea", 3);
        shopProducts[5] = new Product("Banana", 10);
        shopProducts[6] = new Product("Onion", 8);
        shopProducts[7] = new Product("Cucumber", 2);
        shopProducts[8] = new Product("Carrot", 3);
        shopProducts[9] = new Product("Chilly", 3);
    }

    public void startBilling(){
        System.out.print("Enter date:(dd/mm/yyyy): ");
        String date = in.next();
        try {
            Date date1=new SimpleDateFormat("dd/MM/yyyy").parse(date);
        } catch (ParseException ex) {
            System.err.println("Error in date entry");
        }

        ArrayList<Product> scannedProducts = new ArrayList<Product>();
        System.out.println("PRODUCTS");
        for(int i=0;i<shopProducts.length;i++){
            System.out.println(" "+(i+1)+". "+shopProducts[i].getName()+"   $"+shopProducts[i].getPrice());
        }
        System.out.println(" "+(shopProducts.length+1)+". Exit");
        int choice;
        do{
            System.out.print("Enter choice: ");
            choice = in.nextInt();
            if(choice<1 || choice>(shopProducts.length))
                break;
            scannedProducts.add(shopProducts[choice-1]);
        }while(choice>0 && choice<(shopProducts.length+1));

        System.out.println("Select billing");
        System.out.println("1. Loyalty Billing");
        System.out.println("2. Normal Billing");
        System.out.println("3. Seasonal Billing");
        System.out.println("4. Sale Billing");
        choice = in.nextInt();
        switch(choice){
            case 1:
                newSale = new Sale(new LoyaltyBilling(), scannedProducts);
                break;
            case 2:
                newSale = new Sale(new NormalBilling(), scannedProducts);
                break;
            case 3:
                newSale = new Sale(new SeasonalBilling(), scannedProducts);
                break;
            case 4:
                newSale = new Sale(new SaleBilling(), scannedProducts);
                break;
            default:
                System.out.println("Invalid entry");
        }

        System.out.printf("Total Cost: $%.2f",newSale.calculateCost());
    }

    public static void main(String[] args) {
        Shop s = new Shop();
        s.initilaizeProducts();
        s.startBilling();
    }
}

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