Answer to Question #268821 in Java | JSP | JSF for Chakalaka

Question

Sale-Receipt: Write a java program that specifies four parallel one dimensional arrays to store the product name, quantity and cost plus ItemTotal. Each array should be capable of holding a number elements provided by user input. Using a for loop input values for length and width arrays. The entries in the area arrays should be the corresponding values for the product, which is to be used to calculate the costs as follows (thus, itemTotat[i] =  quantity [i]* cost [i]) after data has been entered display the following receipt as output:

 Sample Run1

Enter the number of products: 2

Enter product 1, Qty and Cost: Banana 4 2.65

Enter product 2, Qty and Cost: Coke 1 9.18

 

Output1:

Product         Quantity        Cost               Total

----------    -----------        -------      --------

Banana      4          2.65       10.60

coke              1          9.18       9.18

Sub-Total                         19.78

VAT(15%)                         2.97

TOTAL                                   N$        22.75

Answer 1

package com.task;

import java.util.Scanner;

public class Main {

    private static String[] name;
    private static Integer[] quantity;
    private static Double[] cost;
    private static Double[] itemTotal;

    private static String space = "    ";
    private static String column1 = "Product";
    private static String column2 = "Quantity";
    private static String column3 = "Cost";
    private static String column4 = "Total";

    public static void main(String[] args) {
        System.out.print("Enter the number of products: ");
        Scanner sc = new Scanner(System.in);
        Integer length = Integer.valueOf(sc.nextLine());
        initArrays(length);
        String[] prodLine;
        for (int i = 0; i < length; i++) {
            System.out.print("Enter product " + (i+1) + ", Qty and Cost: ");
            prodLine = sc.nextLine().split(" ");
            name[i] = prodLine[0];
            quantity[i] = Integer.valueOf(prodLine[1]);
            cost[i] = Double.valueOf(prodLine[2]);
            itemTotal[i] = quantity[i]*cost[i];
        }
        printout();
    }

    private static void initArrays(int length) {
        name = new String[length];
        quantity = new Integer[length];
        cost = new Double[length];
        itemTotal = new Double[length];
    }

    private static void printout() {
        printLine(column1, column2, column3, column4);
        printLine(underscoreString(column1.length()),
                underscoreString(column2.length()),
                underscoreString(column3.length()),
                underscoreString(column4.length()));
        Double subTotal = 0d;
        for (int i = 0; i < name.length; i++) {
            printLine(name[i], quantity[i].toString(), cost[i].toString(), itemTotal[i].toString());
            subTotal = subTotal + itemTotal[i];
        }
        printLine("Sub-Total", "", "", subTotal.toString());
        Double vat = subTotal*0.15;
        printLine("VAT(15%)", "", "", vat.toString());
        printLine("TOTAL", "", "", String.valueOf(subTotal+vat));
    }

    private static void printLine(String col1, String col2, String col3, String col4) {
        System.out.println(padString(col1, 9) + space
                + padString(col2, column2.length()) + space
                + padString(col3, column3.length()) + space
                + padString(col4, column4.length()));
    }

    private static String padString(String input, Integer length) {
        return String.format("%1$" + length + "s", input);
    }

    private static String underscoreString(Integer length) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < length; i++) {
            sb.append('_');
        }
        return sb.toString();
    }

}