- Java Program Grocery Receipt Example
- Java Program Grocery Receipts
- Java Program Grocery Receipt Template
Receipt Calculator Simulation
Java Program Grocery Receipt Example
Java Program Grocery Receipts
Good.javapackage receipts;import java.text.DecimalFormat;// Class representing good in the shop basket. Stores number of this good in the basket, price of one instance of this good.public class Good {// Keywords for determination if good is exempt or notprivate static final String[] exemptKeyWords = {'food', 'book', 'medicine', 'chocolate', 'pill'};// Format for outputting decimal numbersprivate static DecimalFormat df = new DecimalFormat('0.00');// Instance private fields of classprivate String name;private double price;private int number;private boolean isImported;private boolean isExempt;public Good(String name, double price, int number) throws IllegalArgumentException{// Throwing exceptions if parameters are illegalif (price <= 0.0) {throw new IllegalArgumentException('Price must be positive');}if (number <= 0.0) {throw new IllegalArgumentException('Quantity must be positive integer');}this.name = name;this.price = price;this.number = number;isImported = false;isExempt = false;// Checking if good is imported or exemptString lcName = name.toLowerCase();if (lcName.contains('imported')) {isImported = true;}// If name of good contains one of keywords, then good is exemptfor (String exemptKeyWord : exemptKeyWords) {if (lcName.contains(exemptKeyWord)) {isExempt = true;break;}}}public Good(String name, double price) {this(name, price, 1);}// Getter for name fieldpublic String getName() {return name;}// Adding more instances of the same good (increasing number field of the class).// If prices differ, returns false.public boolean addQuantity(Good good) {if (this.price != good.price) {return false;}this.number += good.number;return true;}// Checking if name of the current good matches given namepublic boolean equals(String name) {return this.name.equals(name);}// Return overall sale tax for 'number' of goodspublic double getTax() {if (isExempt) {return 0.0;}return number*Math.ceil((price*0.1)/0.05)*0.05;}// Return overall import tax for 'number' of goodspublic double getImportTax() {if (!isImported)return 0.0;return number*Math.ceil((price*0.05)/0.05)*0.05;}// Calculates overall price for 'number' of goods (including taxes)public double getOverallPrice() {return number*price + getTax() + getImportTax();}// Returns the string representation of good info.public String toString() {StringBuffer buf = new StringBuffer();buf.append(name + ': ' + df.format(getOverallPrice()));if (number >1) {buf.append(' (' + number + ' @ ' + df.format(getOverallPrice()/number) + ')');}return buf.toString();}}Receipt.javapackage receipts;import java.text.DecimalFormat;import java.util.ArrayList;import java.util.InputMismatchException;import java.util.List;import java.util.NoSuchElementException;import java.util.Scanner;// Class representing selected set of goods.public class Receipt {// Format for outputting decimal numbersprivate static DecimalFormat df = new DecimalFormat('0.00');// List, containing all selected goodsprivate List basket;private double totalPrice;private double taxes;public Receipt() {basket = new ArrayList<>();taxes = 0;}// Adding good to the basket. If no such kind of good was selected previously, than adding new good instance to the basket list.// Otherwise, increasing number field in corresponding good instance.public void addGood(Good good) throws IllegalArgumentException{for (Good g : basket) {if (g.equals(good.getName())) {if (!g.addQuantity(good)) {throw new IllegalArgumentException('Two goods with the same name but different data are found.');}return;}}basket.add(good);}// This method outputs all necessary infopublic void outputAll() {for (Good g : basket) {// Cumulating total overall cost and taxestaxes += (g.getTax() + g.getImportTax());totalPrice += g.getOverallPrice();// Printing separate good infoSystem.out.println(g);}System.out.println('Sales taxes: ' + df.format(taxes));System.out.println('Total price: ' + df.format(totalPrice));}// Main method. Reads items from console, until empty string is enteredpublic static void main(String[] args) {Scanner scanner = new Scanner(System.in);Receipt receipt = new Receipt();// Reading from consolewhile(true) {// If line is empty, then quitString line = scanner.nextLine();if (line.equals(')) {break;}// Scanning entered lineScanner lineScan = null;try {// Line must contain word 'at'int index = line.lastIndexOf('at');if (index -1) {throw new IllegalArgumentException('Illegal input format: no 'at' found.');}// Reading price after word 'at'. Can throw NumberFormatExceptionString priceLine = line.substring(index+2);double price = Double.parseDouble(priceLine);lineScan = new Scanner(line.substring(0, index));// Reading item quantity in the beginning of the line. Can throw InputMismatchExceptionint number = lineScan.nextInt();// Trying to read good name. NoSuchElementException can be thrown if name is empty.String name = lineScan.next();while (lineScan.hasNext()) {name += (' ' + lineScan.next());}// Creating new item instance and putting it to the basketreceipt.addGood(new Good(format(name), price, number));lineScan.close();}// Processing errorscatch(NumberFormatException nfe) {System.out.println('Can not read price');}catch (InputMismatchException ime) {System.out.println('Can not read quantity');lineScan.close();}catch (NoSuchElementException nsee) {System.out.println('Good item name is empty');lineScan.close();}catch(IllegalArgumentException iae) {if (lineScan != null) {lineScan.close();}System.out.println(iae.getMessage());}}scanner.close();// Printing resultsreceipt.outputAll();}// Formatting good name. First letter of it must be capital.private static String format(String word) {return word.substring(0,1).toUpperCase() + word.substring(1);}} Java Program Grocery Receipt Template
A JAVA program to create a simple Shopping Cart with the use of Collections framework. It will help budding programmers to map real world application into their code design. Java is a fascinating programming language that provides its users with a plethora of features like OOP, platform independence, simplicity, GUI based programming, etc. One such feature is creating robust applications using the Swing toolkit provided by Java Foundation Classes. This can be used to create lightweight visual components for simple.