Referencing fields between objects of same class

Question

Say I have created multiple TicketMachines from this class. Is there a way I create a method that uses "System.out.println" that would print the price of another TicketMachine object. And if so, could you please point me in the direction to find out how.
* TicketMachine models a naive ticket machine that issues
* flat-fare tickets.
* The price of a ticket is specified via the constructor.
* It is a naive machine in the sense that it trusts its users
* to insert enough money before trying to print a ticket.
* It also assumes that users enter sensible amounts.
* @author David J. Barnes and Michael Kolling
* @version 2006.03.30
public class TicketMachine
    // The price of a ticket from this machine.
    private int price;
    // The amount of money entered by a customer so far.
    private int balance;
    // The total amount of money collected by this machine.
    private int total;
    //Creates a machine that issues tickets at a default price of 1000.
    public TicketMachine( )
     //Exercise 2.39  & 2.42(continues below)
      * By removing the parameter from this constructer
      * and setting the value of price to 1000, objects
      * from this class are automatically constructed with
      * a ticket price of 1000.
        price = 1000;
        balance = 0;
        total = 0;
    //Exercise 2.42
     * Create a machine that issues tickets of the given price.
     * Note that the price must be greater than zero, and there
     * are no checks to ensure this.
    public TicketMachine(int thePrice)
        price = thePrice;
        balance = 0;
        total = 0;
     * Return the price of a ticket.
    public int getPrice()
        return price;
     * Return the amount of money already inserted for the
     * next ticket.
    public int getBalance()
        return balance;
     * Receive an amount of money in cents from a customer.
    public void insertMoney(int amount)
        balance = balance + amount;
     * 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;
    //Exercise 2.33
    //Prints "Please insert the correct amount of money." to the text terminal.
    public void prompt()
        System.out.println("Please insert the correct amount of money.");
    //Exercise 2.34
    //Displays the value of the price field in the text terminal.
    public void showPrice()
        System.out.println("The price of a ticket is " + price + " cents.");
    //Exercise 2.35
     * After creating two ticket machines with different prices
     * and calling thier showPrice methods it showed a different
     * output for each instance. This effect happenes because the
     * showPrice method prints out a string and the value of the price
     * field, which happens to be different in each instance, thereby
     * printing a different output.
    //Exercise 2.36
     * The result of System.out.println("# " + "price" + " cents.");
     * would print the string "# price cents." to the text terminal.
    //Exercise 2.37
     * The result of System.out.println("# price cents.");
     * would be the same as the result of exercise 2.36.
    //Exercise 2.40
    //This method is a mutator and takes no parameters
    //Empties the money form the ticket machine
    public void empty()
        total = 0;
    //Exercise 2.41
    //This method is a mutator
    //Changes the price of a ticket
    public void setPrice(int newPrice)
        price = newPrice;
}

Answer 1

Objects can refer to fields in other objects of the same class.
It's not clear from your description what you're trying to accomplish, however.