Naive Ticket

README.md

@@ -17,12 +17,16 @@ Work through all these exercises. You edit this file with your answers for these
 
 ### Exercise 2.2
 * What value is returned if you check the machine’s balance after it has printed a ticket?
+Answer: The balance will be 0
 
 ### Exercise 2.3
 * Experiment with inserting different amounts of money before printing tickets.
 	* Do you notice anything strange about the machine’s behavior?
 	* What happens if you insert too much money into the machine – do you receive any refund?
+	Answer: The machine will keep the money if too much money is inserted. There will be no refund
+Answer:
 	* What happens if you do not insert enough and then try to print a ticket?
+Answer: The tickets will still be printed
 
 ### Exercise 2.4
 * Try to obtain a good understanding of a ticket machine’s behavior by interacting with it on the object bench before we start looking at how the `TicketMachine` class is implemented in the next section.
@@ -31,6 +35,7 @@ Work through all these exercises. You edit this file with your answers for these
 * Create another ticket machine for tickets of a different price.
 	* Buy a ticket from that machine.
 	* Does the printed ticket look different?
+	Answer: No, the only difference would only be the price of the ticket. Tickets are still being printed regardless of how much money is being inserted.
 
 ### Exercise 2.6
 * Write out what you think the outer wrappers of the `Student` and `LabClass` classes might look like – do not worry about the inner part.
@@ -41,11 +46,15 @@ Does it matter whether we write<br>
 or<br>
 `class public TicketMachine`<br>
 in the outer wrapper of a class?
+Answer: Yes, only the latter works.
 
 * Edit the source of the `TicketMachine` class to make the change and then close the editor window.
 	* Do you notice a change in the class diagram?
+	Answer; You can no longer create an object out of the class diagram
 	* What error message do you get when you now press the compile button?
+	Answer: "Error(s) found in class. Press Command K or click link on right to go to next error."
 	* Do you think this message clearly explains what is wrong?
+	Answer: Yes
 
 ### Exercise 2.8
 * Check whether or not it is possible to leave out the word `public` from the outer wrapper of the `TicketMachine` class.
@@ -54,9 +63,13 @@ in the outer wrapper of a class?
 * From your earlier experimentation with the ticket machine objects within BlueJ you can probably remember the names of some of the methods – `printTicket`, for instance.
 	* Look at the class definition in Code 2.1 and use this knowledge, along with the additional information about ordering we have given you, to try to make a list of the names of the fields, constructors, and methods in the `TicketMachine` class.
 	* Hint: There is only one constructor in the class.
-
+	Answer: Fields: Price, Balance, and Total
+					constructor: Ticket machine
+					Methods: getPrice, getTicketNumber, getBalance,
 ### Exercise 2.10
 * Do you notice any features of the constructor that make it significantly different from the other methods of the class?
+Answer: Constructors is the only method with a parameter, responsible for assigning the values of price, balance, total, and ticketNumber. Also the constructor does not return any types of values
+
 
 ### Exercise 2.11
 * What do you think is the type of each of the following fields?
@@ -66,6 +79,7 @@ private int count;
 private Student representative;
 private Server host;
 ```
+Answer = int, Student, Server
 
 ### Exercise 2.12
 * What are the names of the following fields?
@@ -75,6 +89,7 @@ private boolean alive;
 private Person tutor;
 private Game game;
 ```
+Answer = alive, tutor, game
 ### Exercise 2.13
 
 In the following field declaration from the TicketMachine class<br>
@@ -83,35 +98,42 @@ In the following field declaration from the TicketMachine class<br>
 private int price;
 ```
 does it matter which order the three words appear in?
+Answer: Yes
 * Edit the `TicketMachine` class to try different orderings. After each change, close the editor.
 	* Does the appearance of the class diagram after each change give you a clue as to whether or not other orderings are
-possible?
+possible? Yes
 	* Check by pressing the compile button to see if there is an error message.
 	* Make sure that you reinstantiate the original version after your experiments!
 
 ### Exercise 2.14
 * Is it always necessary to have a semicolon at the end of a field declaration?
+Answer: Yes, as semicolon tells you the end of your declaration.
 * Once again, experiment via the editor.
 * The rule you will learn here is an important one, so be sure to remember it.
 
 
 ### Exercise 2.15
 * Write in full the declaration for a field of type `int` whose name is `status`.
+Answer: private int status
 
 ### Exercise 2.16
 * To what class does the following constructor belong?
 ```
 public Student(String name)
 ```
+Answer: Student
 
 ### Exercise 2.17
 * How many parameters does the following constructor have and what are their types?
 ```
 public Book(String title, double price)
 ```
+Answer: 2 parameters
 
 ### Exercise 2.18
 * Can you guess what types some of the `Book` class’s fields might be?
 * Can you assume anything about the names of its fields?
 
+Answer: Some of the names that can be included in the fields would be Genre, Price, and Title
+
 READ upto and INCLUDING section 2.15 of this chapter.

TicketMachine.java

@@ -9,10 +9,11 @@
  * @author David J. Barnes and Michael Kolling
  * @version 2008.03.30
  */
-public class TicketMachine
+public  class TicketMachine
+
 {
     // The price of a ticket from this machine.
-    private Integer price;
+   private Integer price;
     // The amount of money entered by a customer so far.
     private Integer balance;
     // The total amount of money collected by this machine.