// strings/ReceiptBuilder.java

// (c)2016 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://mindviewinc.com/Books/OnJava/ for more book information.

import java.util.*;

public class ReceiptBuilder {

private double total = 0;

private Formatter f =

new Formatter(new StringBuilder());

public ReceiptBuilder() {

f.format("%-15s %5s %10s\n", "Item", "Qty", "Price");

f.format("%-15s %5s %10s\n", "----", "---", "-----");

}

public void add(String name, int qty, double price) {

f.format("%-15.15s %5d %10.2f\n", name, qty, price);

total += price * qty;

}

public String build() {

f.format("%-15s %5s %10.2f\n", "Tax", "", total*0.06);

f.format("%-15s %5s %10s\n", "", "", "-----");

f.format("%-15s %5s %10.2f\n", "Total", "",

total * 1.06);

return f.toString();

}

public static void main(String[] args) {

ReceiptBuilder receiptBuilder = new ReceiptBuilder();

receiptBuilder.add("Jack's Magic Beans", 4, 4.25);

receiptBuilder.add("Princess Peas", 3, 5.1);

receiptBuilder.add("Three Bears Porridge", 1, 14.29);

System.out.println(receiptBuilder.build());

}

}

/* Output:

Item Qty Price

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

Jack's Magic Be 4 4.25

Princess Peas 3 5.10

Three Bears Por 1 14.29

Tax 2.80

-----

Total 49.39

*/