Understanding class definitions - Objects First with Java: A Practical Introduction Using BlueJ - page 22

Code 2.1
continued
The TicketMachine
class

/**
* Print a ticket
* Update the total collected and
* reduce the balance to zero.
*/
public void printTicket()
{
// Simulate the printing of a ticket.
System.out.println( "##################" );
System.out.println( "# The BlueJ Line" );
System.out.println( "# Ticket" );
System.out.println( "# " + price + " cents." );
System.out.println( "##################" );
System.out.println();

// Update the total collected with the balance.
total = total + balance;
// Clear the balance.
balance = 0;

}

}

2.3 The class header

The text of a class can be broken down into two main parts: a small outer wrapping that
simply names the class and a much larger inner part that does all the work. In this case, the
outer wrapping appears as follows:

public class TicketMachine
{

Inner part of the class omitted.

}

The outer wrappings of different classes all look pretty much the same. The outer wrapping
contains the class header, whose main purpose is to provide a name for the class. By a widely

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