I made my changes

README.md

@@ -21,48 +21,122 @@ Work through all these exercises. You edit this file with your answers for these
 	* You can insert several separate amounts of money into the machine, just like you might insert multiple coins or notes into a real machine. Try inserting the exact amount required for a ticket. As this is a simple machine, a ticket will not be issued automatically, so once you have inserted enough money, call the `printTicket` method. A facsimile ticket should be printed in the BlueJ terminal window.
 
 ### Exercise 2.2
-* What value is returned if you check the machine’s balance after it has printed a ticket?
+* What value is returned if you check the machine’s balance after it has printed a ticket? 
+
+```java
+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?
-	* What happens if you do not insert enough and then try to print a ticket?
+	* Do you notice anything strange about the machine’s behavior? 
+
+	```java
+	It prints a ticket no matter how much money you have, and it always resets the balance back to zero after printing ticket.
+	```
+
+	* What happens if you insert too much money into the machine – do you receive any refund? 
+
+	```java
+	No refund is received.
+	```
+
+	* What happens if you do not insert enough and then try to print a ticket? 
+
+	```java
+	A ticket will print always, no matter how much money you have.
+	```
+
 
 ### 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.
 
 ### Exercise 2.5
 * Create another ticket machine for tickets of a different price.
 	* Buy a ticket from that machine.
-	* Does the printed ticket look different?
+	* Does the printed ticket look different? 
+
+	```java
+	The balance and cost of ticket both reset. Ticket cost gets changed to whatever you set it to.
+	```
+
 
 ### 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.
 
+```java
+public class Student {
+
+}
+```
+
+```java
+public class LabClass {
+
+}
+```
+
 ### Exercise 2.7
 Does it matter whether we write<br>
 `public class TicketMachine`<br>
 or<br>
 `class public TicketMachine`<br>
 in the outer wrapper of a class?
 
+```java
+Yes, it does matter. It should be
+
+public class TicketMachine
+```
+
 * 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?
-	* What error message do you get when you now press the compile button?
-	* Do you think this message clearly explains what is wrong?
+
+```java
+Yes, on the diagram the class TicketMachine is now unable to be compiled. It is criss-crossed in red.
+```
+
+* What error message do you get when you now press the compile button?
+
+```java
+4 errors are found after attempting to compile.
+ * <identifier>expected
+ * <identifier>expected
+ * illegal start of expression
+ * invalid method declaration; return type required
+ ```
+* Do you think this message clearly explains what is wrong?
+
+```java
+I do not think so because the errors point to other issues in the code, and not the fact that the class was not declared properly.
+```
 
 ### Exercise 2.8
 * Check whether or not it is possible to leave out the word `public` from the outer wrapper of the `TicketMachine` class.
 
+```java
+Yes, it is possible.
+```
+
 ### Exercise 2.9
 * 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.
 
+```java
+Fields: price, balance, total
+Constructors: TicketMachine
+Methods: getPrice(), getBalance(), insertMoney(), printTicket()
+```
+
+
 ### Exercise 2.10
 * Do you notice any features of the constructor that make it significantly different from the other methods of the class?
 
+```java
+TicketMachine just sets initial values but does not return or compute any values. The other methods all return or compute values.
+```
+
 ### Exercise 2.11
 * What do you think is the type of each of the following fields?
 
@@ -72,6 +146,12 @@ private Student representative;
 private Server host;
 ```
 
+```java
+private int count; is type int
+private Student representative; is type Student
+private Server host; is type Server
+```
+
 ### Exercise 2.12
 * What are the names of the following fields?
 
@@ -80,6 +160,11 @@ private boolean alive;
 private Person tutor;
 private Game game;
 ```
+
+```java
+alive, tutor, game
+```
+
 ### Exercise 2.13
 
 In the following field declaration from the TicketMachine class<br>
@@ -91,6 +176,11 @@ does it matter which order the three words appear in?
 * 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?
+
+```java
+Yes, the diagrams turn red after clicking compile. This indicates that there are errors in the code and it will not work. Therefore, other orders are not possible.
+```
+
 	* 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!
 
@@ -99,24 +189,45 @@ possible?
 * Once again, experiment via the editor.
 * The rule you will learn here is an important one, so be sure to remember it.
 
+```java
+Yes, it is always necessary to have a semicolon at the end of a field declaration. If you do not have one then Java does not know that it is the end of the declaration.
+```
+
 
 ### Exercise 2.15
 * Write in full the declaration for a field of type `int` whose name is `status`.
 
+```java
+private int status;
+```
+
 ### Exercise 2.16
 * To what class does the following constructor belong?
 ```
 public Student(String name)
 ```
 
+```java
+It belongs to Student.
+```
+
 ### Exercise 2.17
 * How many parameters does the following constructor have and what are their types?
 ```
 public Book(String title, double price)
 ```
 
+```java
+There are two parameters, title and price, and the their types are String and double.
+```
+
 ### 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?
 
+```java
+Some types might include int, String, char
+You could possibly assume the names themselves based on what the type is.  
+```
+
 READ upto and INCLUDING section 2.15 of this chapter.

TicketMachine.java

@@ -9,7 +9,7 @@
  * @author David J. Barnes and Michael Kolling
  * @version 2008.03.30
  */
-public class TicketMachine
+class TicketMachine
 {
     // The price of a ticket from this machine.
     private Integer price;

bluej.pkg

@@ -1,32 +1,48 @@
 #BlueJ package file
-editor.fx.0.height=722
-editor.fx.0.width=800
-editor.fx.0.x=709
-editor.fx.0.y=113
-objectbench.height=101
-objectbench.width=461
+dependency1.from=TicketMachineTest
+dependency1.to=TicketMachine
+dependency1.type=UsesDependency
+editor.fx.0.height=964
+editor.fx.0.width=951
+editor.fx.0.x=20
+editor.fx.0.y=69
+objectbench.height=100
+objectbench.width=611
 package.divider.horizontal=0.6
-package.divider.vertical=0.8007380073800738
-package.editor.height=427
-package.editor.width=674
-package.editor.x=1067
-package.editor.y=119
-package.frame.height=600
-package.frame.width=800
-package.numDependencies=0
-package.numTargets=1
+package.divider.vertical=0.7220779220779221
+package.editor.height=255
+package.editor.width=518
+package.editor.x=60
+package.editor.y=1114
+package.frame.height=449
+package.frame.width=635
+package.numDependencies=1
+package.numTargets=3
 package.showExtends=true
 package.showUses=true
 project.charset=UTF-8
-readme.height=58
+readme.height=60
 readme.name=@README
-readme.width=47
+readme.width=48
 readme.x=10
 readme.y=10
-target1.height=50
-target1.name=TicketMachine
+target1.height=70
+target1.name=TicketMachineTest
 target1.showInterface=false
-target1.type=ClassTarget
-target1.width=120
-target1.x=80
-target1.y=50
+target1.type=UnitTestTargetJunit4
+target1.width=130
+target1.x=330
+target1.y=20
+target2.height=50
+target2.name=TicketMachine
+target2.showInterface=false
+target2.type=ClassTarget
+target2.width=120
+target2.x=120
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+target3.height=70
+target3.name=README.md
+target3.type=TextTarget
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package.bluej

@@ -1,32 +1,48 @@
 #BlueJ package file
-editor.fx.0.height=722
-editor.fx.0.width=800
-editor.fx.0.x=709
-editor.fx.0.y=113
-objectbench.height=101
-objectbench.width=461
+dependency1.from=TicketMachineTest
+dependency1.to=TicketMachine
+dependency1.type=UsesDependency
+editor.fx.0.height=964
+editor.fx.0.width=951
+editor.fx.0.x=20
+editor.fx.0.y=69
+objectbench.height=100
+objectbench.width=611
 package.divider.horizontal=0.6
-package.divider.vertical=0.8007380073800738
-package.editor.height=427
-package.editor.width=674
-package.editor.x=1067
-package.editor.y=119
-package.frame.height=600
-package.frame.width=800
-package.numDependencies=0
-package.numTargets=1
+package.divider.vertical=0.7220779220779221
+package.editor.height=255
+package.editor.width=518
+package.editor.x=60
+package.editor.y=1114
+package.frame.height=449
+package.frame.width=635
+package.numDependencies=1
+package.numTargets=3
 package.showExtends=true
 package.showUses=true
 project.charset=UTF-8
-readme.height=58
+readme.height=60
 readme.name=@README
-readme.width=47
+readme.width=48
 readme.x=10
 readme.y=10
-target1.height=50
-target1.name=TicketMachine
+target1.height=70
+target1.name=TicketMachineTest
 target1.showInterface=false
-target1.type=ClassTarget
-target1.width=120
-target1.x=80
-target1.y=50
+target1.type=UnitTestTargetJunit4
+target1.width=130
+target1.x=330
+target1.y=20
+target2.height=50
+target2.name=TicketMachine
+target2.showInterface=false
+target2.type=ClassTarget
+target2.width=120
+target2.x=120
+target2.y=90
+target3.height=70
+target3.name=README.md
+target3.type=TextTarget
+target3.width=120
+target3.x=560
+target3.y=10