possible FileInput/output problem

[pleb]

Hey Guys,

if i want to get the total price in
total = new JTextField(20);
c.add(total);

would i first have to save the price per ticket in a text file and then open that file. Muliplying this then by the number of tickets purchased?.. or is there an easier way?


[CODE=Java]
import java.awt.*;
import java.awt.event. *;
import javax .swing.*;
import java.io.*;


public class Routes extends JFrame implements ActionListener
{

private String from[] = {"From","Cork", "Limerick","Bel fast","Dublin"} ;
private String to[] = {"To","Cork","L imerick","Belfa st","Dublin"} ;
private String tickets[] = {"Tickets","1", "2","3","4","5" ,"6"};
private String back[] = {"Return", "Yes","No"} ;
private JLabel label1, label2, label3,label4;
private JComboBox fromCmb,toCmb, ticketsCmb, backCmb;
private JButton next;
private JLabel Tickets,Price, Total;
private JTextField ticket,price,to tal;
private JButton Procced;


public static void main(String args[])
{
Routes app = new Routes();
}

public Routes() //constructor
{
super("Selec Destinations");

Container c = getContentPane( );
c.setLayout(new FlowLayout());

label1 = new JLabel("From: ");
c.add(label1);

fromCmb = new JComboBox(from) ;
c.add(fromCmb);

label2 = new JLabel("To ");
c.add(label2);

toCmb = new JComboBox(to);
c.add(toCmb);

label3 = new JLabel("Number Of Tickets");
c.add(label3);

ticketsCmb = new JComboBox(ticke ts);
c.add(ticketsCm b);

label4 = new JLabel("Return ");
c.add(label4);

backCmb = new JComboBox(back) ;
c.add(backCmb);

next = new JButton("Next") ;
next.addActionL istener(this);
c.add(next);

Tickets = new JLabel("Number Of Tickets ");
c.add(Tickets);

ticket = new JTextField(20);
c.add(ticket);

Price = new JLabel("Price Per Ticket ");
c.add(Price);

price = new JTextField(20);
c.add(price);

Total = new JLabel("Total ");
c.add(Total);

total = new JTextField(20);
c.add(total);

Procced = new JButton("Procce d");
Procced.addActi onListener(this );
c.add(Procced);



setSize(400, 300);
setVisible(true );
}

public void actionPerformed (ActionEvent e)
{
if (e.getSource() == Procced)
{
Payment payment = new Payment();
setVisible(fals e);
}
}

}[/CODE]

[BigDaddyLH]

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MODERATOR

[BigDaddyLH]

Unless I'm missing something here, you want the user to enter some information in the GUI, then your program should respond by doing a calculation and displaying the result.

I don't see how file I/O is relevant. Am I missing something?

Do you understand how to make GUI's interactive by using listeners? http://java.sun.com/docs/books/tutor...nts/index.html

[pleb]

Unless I'm missing something here, you want the user to enter some information in the GUI, then your program should respond by doing a calculation and displaying the result.

I don't see how file I/O is relevant. Am I missing something?

Do you understand how to make GUI's interactive by using listeners? http://java.sun.com/docs/books/tutor...nts/index.html

Sorry complete newb at this... Yes it will be preforming calculations but the "Admin" have to be able to set/change the ticket prices.. Thus im thinking the Price per ticket has to be read form the text file first?

[BigDaddyLH]

Sorry complete newb at this... Yes it will be preforming calculations but the "Admin" have to be able to set/change the ticket prices.. Thus im thinking the Price per ticket has to be read form the text file first?

That's certainly possible. One simple way to create configuration data like that is to use a property file:

http://java.sun.com/docs/books/tutorial/essential/environment/properties.html