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  1. import java.io.PrintStream;
  2. import java.math.BigDecimal;
  3. import java.math.RoundingMode;
  4. import java.nio.charset.StandardCharsets;
  5. import java.util.Locale;
  6.  
  7. public class Main {
  8.  
  9.     private static final class TuitionPlan {
  10.         private final BigDecimal hourlyRateGbp;
  11.         private final int lessonMinutes;
  12.         private final BigDecimal lessonsPerWeek;
  13.         private final int numberOfWeeks;
  14.  
  15.         TuitionPlan(
  16.                 BigDecimal hourlyRateGbp,
  17.                 int lessonMinutes,
  18.                 BigDecimal lessonsPerWeek,
  19.                 int numberOfWeeks) {
  20.  
  21.             this.hourlyRateGbp = hourlyRateGbp;
  22.             this.lessonMinutes = lessonMinutes;
  23.             this.lessonsPerWeek = lessonsPerWeek;
  24.             this.numberOfWeeks = numberOfWeeks;
  25.         }
  26.  
  27.         void validate() {
  28.             if (hourlyRateGbp.compareTo(BigDecimal.ZERO) <= 0) {
  29.                 throw new IllegalArgumentException(
  30.                         "Hourly rate must be greater than zero."
  31.                 );
  32.             }
  33.  
  34.             if (lessonMinutes < 15 || lessonMinutes > 180) {
  35.                 throw new IllegalArgumentException(
  36.                         "Lesson length must be between 15 and 180 minutes."
  37.                 );
  38.             }
  39.  
  40.             if (lessonsPerWeek.compareTo(BigDecimal.ZERO) <= 0) {
  41.                 throw new IllegalArgumentException(
  42.                         "Lessons per week must be greater than zero."
  43.                 );
  44.             }
  45.  
  46.             if (numberOfWeeks < 1 || numberOfWeeks > 52) {
  47.                 throw new IllegalArgumentException(
  48.                         "Number of weeks must be between 1 and 52."
  49.                 );
  50.             }
  51.         }
  52.  
  53.         BigDecimal lessonCost() {
  54.             return hourlyRateGbp
  55.                     .multiply(BigDecimal.valueOf(lessonMinutes))
  56.                     .divide(
  57.                             BigDecimal.valueOf(60),
  58.                             2,
  59.                             RoundingMode.HALF_UP
  60.                     );
  61.         }
  62.  
  63.         BigDecimal fourWeekCost() {
  64.             return lessonCost()
  65.                     .multiply(lessonsPerWeek)
  66.                     .multiply(BigDecimal.valueOf(4))
  67.                     .setScale(2, RoundingMode.HALF_UP);
  68.         }
  69.  
  70.         BigDecimal periodCost() {
  71.             return lessonCost()
  72.                     .multiply(lessonsPerWeek)
  73.                     .multiply(BigDecimal.valueOf(numberOfWeeks))
  74.                     .setScale(2, RoundingMode.HALF_UP);
  75.         }
  76.     }
  77.  
  78.     private static String money(BigDecimal value) {
  79.         return String.format(Locale.UK, "£%,.2f", value);
  80.     }
  81.  
  82.     public static void main(String[] args) {
  83.         // Ensure that the pound sign is printed correctly.
  84.         System.setOut(
  85.                 new PrintStream(
  86.                         System.out,
  87.                         true,
  88.                         StandardCharsets.UTF_8
  89.                 )
  90.         );
  91.  
  92.         /*
  93.          * Edit these four values before running:
  94.          *
  95.          * 30 = hourly rate in pounds
  96.          * 60 = lesson length in minutes
  97.          * 1  = lessons per week
  98.          * 12 = number of weeks
  99.          */
  100.         TuitionPlan plan = new TuitionPlan(
  101.                 new BigDecimal("30"),
  102.                 60,
  103.                 new BigDecimal("1"),
  104.                 12
  105.         );
  106.  
  107.         plan.validate();
  108.  
  109.         System.out.println("ONLINE TUITION BUDGET EXAMPLE");
  110.         System.out.println("-".repeat(36));
  111.  
  112.         System.out.printf(
  113.                 "Hourly rate:       %s%n",
  114.                 money(plan.hourlyRateGbp)
  115.         );
  116.  
  117.         System.out.printf(
  118.                 "Lesson length:     %d minutes%n",
  119.                 plan.lessonMinutes
  120.         );
  121.  
  122.         System.out.printf(
  123.                 "Lessons per week:  %s%n",
  124.                 plan.lessonsPerWeek.toPlainString()
  125.         );
  126.  
  127.         System.out.printf(
  128.                 "Selected period:   %d weeks%n",
  129.                 plan.numberOfWeeks
  130.         );
  131.  
  132.         System.out.println();
  133.  
  134.         System.out.printf(
  135.                 "Cost per lesson:   %s%n",
  136.                 money(plan.lessonCost())
  137.         );
  138.  
  139.         System.out.printf(
  140.                 "Four-week example: %s%n",
  141.                 money(plan.fourWeekCost())
  142.         );
  143.  
  144.         System.out.printf(
  145.                 "Period total:      %s%n",
  146.                 money(plan.periodCost())
  147.         );
  148.  
  149.         System.out.println();
  150.         System.out.println("Before booking, confirm:");
  151.  
  152.         String[] prompts = {
  153.                 "the tutor's current live rate and lesson length",
  154.                 "subject, level and exam-board experience",
  155.                 "normal availability and cancellation terms",
  156.                 "how progress and homework will be handled",
  157.                 "the online platform and safeguarding arrangements"
  158.         };
  159.  
  160.         for (int i = 0; i < prompts.length; i++) {
  161.             System.out.printf("%d. %s%n", i + 1, prompts[i]);
  162.         }
  163.  
  164.         System.out.println();
  165.         System.out.println(
  166.                 "One UK directory using a pay-as-you-go model:"
  167.         );
  168.         System.out.println(
  169.                 "https://l...content-available-to-author-only...n.com/find-a-tutor"
  170.         );
  171.         System.out.println(
  172.                 "Live profiles and current terms are the source of truth."
  173.         );
  174.     }
  175. }
Success #stdin #stdout 0.11s 57156KB
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ONLINE TUITION BUDGET EXAMPLE
------------------------------------
Hourly rate:       £30.00
Lesson length:     60 minutes
Lessons per week:  1
Selected period:   12 weeks

Cost per lesson:   £30.00
Four-week example: £120.00
Period total:      £360.00

Before booking, confirm:
1. the tutor's current live rate and lesson length
2. subject, level and exam-board experience
3. normal availability and cancellation terms
4. how progress and homework will be handled
5. the online platform and safeguarding arrangements

One UK directory using a pay-as-you-go model:
https://l...content-available-to-author-only...n.com/find-a-tutor
Live profiles and current terms are the source of truth.
https://ideone.com/re12yP
language:
Java (HotSpot 12)
created:
4 days ago
visibility:
public

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