good morning im here doing the billpayer program for java programming and im stuck on one error on line 172 can anyone please help me

/*

Chapter 8: Bill Payer Power & Light

Programmer:

Date: August 28, 2017

Program name:BillPayer

*/

import java.io.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import java.text.*;

import java.util.*;

public class BillPayer extends JFrame implements ActionListener

{

//Declare output stream

DataOutputStream output;

//Construct a panel for each row

JPanel firstRow = new JPanel();

JPanel secondRow = new JPanel();

JPanel thirdRow = new JPanel();

JPanel fourthRow = new JPanel();

JPanel fifthRow = new JPanel();

JPanel sixthRow = new JPanel();

JPanel seventhRow = new JPanel();

JPanel eighthRow = new JPanel();

//Construct a panel for the fields and buttons

JPanel fieldPanel = new JPanel();

JPanel buttonPanel = new JPanel();

//Construct labels and text boxes

JLabel acctNumLabel = new JLabel("Account Number: ");

JTextField acctNum = new JTextField(15);

JLabel pmtLabel = new JLabel("Payment Amount:");

JTextField pmt = new JTextField(10);

JLabel firstNameLabel = new JLabel("First Name: ");

JTextField firstName = new JTextField(10);

JLabel lastNameLabel = new JLabel("Last Name:");

JTextField lastName = new JTextField(20);

JLabel addressLabel = new JLabel("Address:");

JTextField address = new JTextField(35);

JLabel cityLabel = new JLabel("City: ");

JTextField city = new JTextField(10);

JLabel stateLabel = new JLabel("State:");

JTextField state = new JTextField(2);

JLabel zipLabel = new JLabel("Zip:");

JTextField zip = new JTextField(9);

//Construct button

JButton submitButton = new JButton("Submit");

public static void main(String[] args) //main method

{

//set the look and feel of the interface

try

{

UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel");

}

catch(Exception e)

{

JOptionPane.showMessageDialog(null, "The UIManager could not set the Look and Feel.","error",JOptionPane.INFORMATION_MESSAGE);

}

//main method executes at run time

BillPayer f = new BillPayer();

f.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);

f.setSize(450,300);

f.setTitle("Crandall Power and Light Customer Payments");

f.setResizable(false);

f.setLocation(200,200);

f.setVisible(true);

}

public BillPayer()

{

Container c = getContentPane();//content pane assigned

c.setLayout((new BorderLayout()));//layout methods

fieldPanel.setLayout(new GridLayout(8,1));

FlowLayout rowSetup = new FlowLayout(FlowLayout.LEFT,5,3);

firstRow.setLayout(rowSetup);//layout methods

secondRow.setLayout(rowSetup);

thirdRow.setLayout(rowSetup);

fourthRow.setLayout(rowSetup);

fifthRow.setLayout(rowSetup);

sixthRow.setLayout(rowSetup);

seventhRow.setLayout(rowSetup);

eighthRow.setLayout(rowSetup);

buttonPanel.setLayout(new FlowLayout(FlowLayout.CENTER));//layout methods

//Add fields to rows

firstRow.add (acctNumLabel);

firstRow.add (pmtLabel);

secondRow.add (acctNum);

secondRow.add (pmt);

thirdRow.add(firstNameLabel);

thirdRow.add(lastNameLabel);

fourthRow.add(firstName);

fourthRow.add(lastName);

fifthRow.add(addressLabel);

sixthRow.add(address);

seventhRow.add(cityLabel);

seventhRow.add(stateLabel);

seventhRow.add(zipLabel);

eighthRow.add(city);

eighthRow.add(state);

eighthRow.add(zip);

//Add rows to panel

fieldPanel.add(firstRow);

fieldPanel.add(secondRow);

fieldPanel.add(thirdRow);

fieldPanel.add(fourthRow);

fieldPanel.add(fifthRow);

fieldPanel.add(sixthRow);

fieldPanel.add(seventhRow);

fieldPanel.add(eighthRow);

//Add button to panel

buttonPanel.add(submitButton);

//Add panels to frame

c.add(fieldPanel, BorderLayout.CENTER);

c.add(buttonPanel, BorderLayout.SOUTH);

//Add functionality to buttons

submitButton.addActionListener(this);

//get current date and open the file

Date today = new Date();

SimpleDateFormat myFormat = new SimpleDateFormat("MMddyy");

String filename = "payments" + myFormat.format(today);

try

{

output = new DataOutputStream(new FileOutputStream(filename));

}

catch(IOException io)

{

JOptionPane.showMessageDialog(null, "The program could not create a storage location. Please check the disk drive and the run the program again.","Error",JOptionPane.INFORMATION_MESSAGE);

System.exit(1);

}

addWindowListener(

new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{

int answer = JOptionPane.showConfirmDialog(null, "Are you sure you want to exit and submit the file?", "File Submission",JOptionPane.YES_NO_OPTION);

if (answer == JOptionPane.YES_OPTION)

System.exit(0);

}

}

);

}

public void actionPerformed(ActionEvent e)

{

String arg = e.getActionCommand();

if (checkField())

{

try

{

output.writeUTF(acctNum.getText());

output.writeUTF(pmt.getText());

output.writeUTF(firstName.getText());

output.writeUTF(lastName.getText());

output.writeUTF(address.getText());

output.writeUTF(city.getText());

output.writeUTF(state.getText());

output.writeUTF(zip.getText());

JOptionPane.showMessageDialog(null,"The payment information has been saved.", "Submission Successful", JOptionPane.INFORMATION_MESSAGE);

}

catch(IOException c)

{

System.exit(1);

}

clearFields();

}

}

public boolean checkfields()

{

if ((acctNum.getText().compareTo("")<1) ||

(pmt.getText().compareTo("")<1) ||

(firstName.getText().compareTo("")<1) ||

(lastName.getText().compareTo("")<1) ||

(address.getText().compareTo("")<1) ||

(city.getText().compareTo("")<1) ||

(state.getText().compareTo("")<1) ||

(zip.getText().compareTo("")<1))

{

JOptionPane.showMessageDialog(null, "you must complete all fields", "Data Entry Error", JOptionPane.WARNING_MESSAGE);

return false;

}

else

{

return true;

}

}

public void clearFields()

{

//clear fields and reset the focus

acctNum.setText("");

pmt.setText("");

firstName.setText("");

lastName.setText("");

address.setText("");

city.setText("");

state.setText("");

zip.setText("");

acctNum.requestFocus();

}

}

it says error: cannot find symbol if (checkfields)))