Update 'README.md'

README.md

@@ -4,8 +4,82 @@ the second Objects lab.
 
 look for the Chapter reading you need in the doc folder.
 
+* Exercise 2.1 Create a TicketMachine object on the object bench and take a look
+at its methods. You should see the following: getBalance, getPrice, insertMoney,
+and printTicket. Try out the getPrice method. You should see a return value containing
+the price of the tickets that was set when this object was created. Use the
+insertMoney method to simulate inserting an amount of money into the machine and
+then use getBalance to check that the machine has a record of the amount inserted.
+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?
+* 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?
+* 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?
+
+* 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.
+* Exercise 2.7 Does it matter whether we write
+`public class TicketMachine`
+or
+`class public TicketMachine`
+in the outer wrapper of a class? 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?
+* Exercise 2.8 Check whether or not it is possible to leave out the word public
+from the outer wrapper of the TicketMachine class.
+
+* 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.
+Exercise 2.10 Do you notice any features of the constructor that make it significantly
+different from the other methods of the class?
+
+* Exercise 2.11 What do you think is the type of each of the following fields?
+```
+private int count;
+private Student representative;
+private Server host;
+```
+* Exercise 2.12 What are the names of the following fields?
+```
+private boolean alive;
+private Person tutor;
+private Game game;
+```
+* Exercise 2.13 In the following field declaration from the TicketMachine class
+`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? Check by pressing the Compile button to see if there is an error message.
+Make sure that you reinstate the original version after your experiments!
+* Exercise 2.14 Is it always necessary to have a semicolon at the end of a field 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.
 * Exercise 2.16 To what class does the following constructor belong?
-`public Student(String name)`
+```
+public Student(String name)
+```
 * Exercise 2.17 How many parameters does the following constructor have andwhat are their types?
-`public Book(String title, double price)`
+```
+public Book(String title, double price)
+```
 * Exercise 2.18 Can you guess what types some of  the Bookclass’s fields mightbe? Can you assume anything about the names of its fields?