the second Objects lab.

TicketMachine.java 2.8KB

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  1. /**
  2. * TicketMachine models a naive ticket machine that issues
  3. * flat-fare tickets.
  4. * The price of a ticket is specified via the constructor.
  5. * It is a naive machine in the sense that it trusts its users
  6. * to insert enough money before trying to print a ticket.
  7. * It also assumes that users enter sensible amounts.
  8. *
  9. * @author David J. Barnes and Michael Kolling
  10. * @version 2008.03.30
  11. */
  12. public class TicketMachine
  13. {
  14. // The price of a ticket from this machine.
  15. private int price;
  16. // The amount of money entered by a customer so far.
  17. private int balance;
  18. // The total amount of money collected by this machine.
  19. private int total;
  20. private int score;
  21. /**
  22. * Create a machine that issues tickets of the given price.
  23. * Note that the price must be greater than zero, and there
  24. * are no checks to ensure this.
  25. */
  26. public TicketMachine()
  27. {
  28. price = 1000;
  29. balance = 0;
  30. total = 0;
  31. }
  32. public TicketMachine(int setPrice)
  33. {
  34. price = setPrice;
  35. balance = 0;
  36. total = 0;
  37. }
  38. private String name;
  39. public void Pet(String petsName)
  40. {
  41. name = petsName;
  42. }
  43. public void increase(int points)
  44. {
  45. score = score + points;
  46. }
  47. public void setPrice(int ticketCost)
  48. {
  49. price = ticketCost;
  50. }
  51. public void discount(int amount)
  52. {
  53. price = price - amount;
  54. }
  55. /**
  56. * Return the price of a ticket.
  57. */
  58. public int getPrice()
  59. {
  60. return price;
  61. }
  62. /**
  63. * Return the amount of money already inserted for the
  64. * next ticket.
  65. */
  66. public int getAmount()
  67. {
  68. return balance;
  69. }
  70. public int getTotal()
  71. {
  72. return total;
  73. }
  74. /**
  75. * Receive an amount of money in cents from a customer.
  76. */
  77. public void insertMoney(int amount)
  78. {
  79. balance = balance + amount;
  80. //return balance;
  81. }
  82. public void empty()
  83. {
  84. total = 0;
  85. }
  86. /**
  87. * Print a ticket.
  88. * Update the total collected and
  89. * reduce the balance to zero.
  90. */
  91. public void printTicket()
  92. {
  93. // Simulate the printing of a ticket.
  94. System.out.println("##################");
  95. System.out.println("# The BlueJ Line");
  96. System.out.println("# Ticket");
  97. System.out.println("# " + price + " cents.");
  98. System.out.println("##################");
  99. System.out.println();
  100. // Update the total collected with the balance.
  101. total = total + balance;
  102. // Clear the balance.
  103. balance = 0;
  104. }
  105. public void prompt()
  106. {
  107. System.out.println("Please insert the correct amount of money.");
  108. }
  109. public void showPrice()
  110. {
  111. System.out.println("The price of a ticket is " + price + " cents.");
  112. }
  113. }