Fairly new to Java: JTextFields help!!!

From: DJM (DJM_666_at_msn.com)
Date: 03/28/04 

Date: 28 Mar 2004 03:27:19 -0800

I have a program with a few JTextFields. How do I store what is input
into these fields in a text file?

Below is some sample code:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class GUI extends JFrame implements ActionListener
{

private JTextField jtfCustID, jtfTransType, jtfDiff, jtfOpeningBal,
jtfClosingBal, jtfTransDate;
private JButton jbConfirm;
    
public GUI()
{
this.setTitle("GUI");
this.setSize(400,300);

jtfCustID = new JTextField();
jtfTransType = new JTextField();
jtfDiff = new JTextField();
jtfOpeningBal = new JTextField();
jtfClosingBal = new JTextField();
jtfTransDate = new JTextField();

jbConfirm = new JButton("Confirmation");

Container cp = this.getContentPane();
cp.setLayout(new GridLayout(8,2));

cp.add(new JLabel("Customer ID"));
cp.add(jtfCustID);

cp.add(new JLabel("Transaction Type"));
cp.add(jtfTransType);

cp.add(new JLabel("Opening/Closing Difference"));
cp.add(jtfDiff);

cp.add(new JLabel("Opening Balance"));
cp.add(jtfOpeningBal);

cp.add(new JLabel("Closing Balance"));
cp.add(jtfClosingBal);

cp.add(new JLabel("Date of Transaction"));
cp.add(jtfTransDate);

cp.add(jbConfirm);

jtfCustID.addActionListener(this);
jtfTransType.addActionListener(this);
jtfDiff.addActionListener(this);
jtfOpeningBal.addActionListener(this);
jtfClosingBal.addActionListener(this);
jtfTransDate.addActionListener(this);

jbConfirm.addActionListener(this);

}// end constructor GUI()

public void actionPerformed(ActionEvent event){

if (event.getSource() == jbConfirm) ;

}// end method actionPerformed()

public static void main(String [] arg){
GUI frame = new GUI();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);

}//end method main()
}// end class GUI

What code would I have to use, to save (into a text file) what is
input into the: jtfCustID, jtfTransType, jtfDiff, jtfOpeningBal,
jtfClosingBal, and jtfTransDate fields?????

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