diff --git a/README.md b/README.md
index ee11f2c..79096c1 100644
--- a/README.md
+++ b/README.md
@@ -22,12 +22,16 @@ 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?
+ * The value is 0.
### Exercise 2.3
* Experiment with inserting different amounts of money before printing tickets.
* Do you notice anything strange about the machine’s behavior?
+ * Yes, the machine does not behave correctly if too much or too little money is inserted.
* What happens if you insert too much money into the machine – do you receive any refund?
+ * You do not receive a refund or more than one ticket. The balance just returns to zero once a ticket is printed.
* What happens if you do not insert enough and then try to print a ticket?
+ * The machine does not recognize that not enough money was entered. It tells you your total is whatever amount was entered and prints the ticket. Then balance returns to zero.
### 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.
@@ -36,32 +40,43 @@ 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?
+ * It shows a different ticket price but otherwise looks the same.
### 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.
+ * public class Student {}
+ * public class LabClass {}
### Exercise 2.7
Does it matter whether we write
`public class TicketMachine`
or
`class public TicketMachine`
-in the outer wrapper of a class?
+in the outer wrapper of a class? - yes
+
* 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?
+ * Do you notice a change in the class diagram?
+ * yes - TicketMachine now has a red hatch pattern
* What error message do you get when you now press the compile button?
+ * "Illegal start of an expression"
* Do you think this message clearly explains what is wrong?
+ * It's mostly clear. It indicates that you cannot start the expression with 'class'
### Exercise 2.8
-* Check whether or not it is possible to leave out the word `public` from the outer wrapper of the `TicketMachine` class.
+* Check whether or not it is possible to leave out the word `public` from the outer wrapper of the `TicketMachine` class. - this does still work
### 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.
+ * fields - price, balance, total, ticketNumber
+ * constructors - TicketMachine
+ * methods - getPrice(), insertMoney(), getBalance(), printTicket(), getTicketNumber(), calculateTotal(), incrementTicketNumber(), printTicket()
* Hint: There is only one constructor in the class.
### Exercise 2.10
* Do you notice any features of the constructor that make it significantly different from the other methods of the class?
+ * it has the same name as the class it's defined in
### Exercise 2.11
* What do you think is the type of each of the following fields?
@@ -71,6 +86,7 @@ private int count;
private Student representative;
private Server host;
```
+* int, Student, Server
### Exercise 2.12
* What are the names of the following fields?
@@ -80,6 +96,8 @@ private boolean alive;
private Person tutor;
private Game game;
```
+* alive, tutor, game
+
### Exercise 2.13
In the following field declaration from the TicketMachine class
@@ -87,15 +105,19 @@ In the following field declaration from the TicketMachine class
```java
private int price;
```
+
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?
+ * yes, they do not seem 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!
+ * yes
+ * Make sure that you reinstantiate the original version after your experiments! - done
### Exercise 2.14
* Is it always necessary to have a semicolon at the end of a field declaration?
+ * yes
* Once again, experiment via the editor.
* The rule you will learn here is an important one, so be sure to remember it.
@@ -103,20 +125,26 @@ possible?
### Exercise 2.15
* Write in full the declaration for a field of type `int` whose name is `status`.
+ * public int status;
+
### Exercise 2.16
* To what class does the following constructor belong?
```
public Student(String name)
```
+* Student
### Exercise 2.17
* How many parameters does the following constructor have and what are their types?
```
public Book(String title, double price)
```
+* 2 parameters
### Exercise 2.18
* Can you guess what types some of the `Book` class’s fields might be?
+ * int, String, boolean
* Can you assume anything about the names of its fields?
+ * their accessibility would extend throughout the class in which they are defined
READ upto and INCLUDING section 2.15 of this chapter.