validity checks

Thanks for all the help. One last question. I figured out eh length problem. How do I parse the statements to verify the zip and payment amount are int/ doubles? Currently they are in the if statement.

/*

Chapter 8:BillPayer Power & Light

Programmer:Joy Starks

Date:November 19, 2004

Programmer 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

{

//Delcare 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 accntNumLabel = new JLabel("Account Number: ");

JTextField accntNum = 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)

{

//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 for this application.","Error", JOptionPane.INFORMATION_MESSAGE);

}

BillPayer f= new BillPayer();

f.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);

f.setSize(450,300);

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

f.setResizable(false);

f.setLocation(200,200);

f.setVisible(true);

}

public BillPayer()

{

Container c = getContentPane();

c.setLayout((new BorderLayout()));

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

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

firstRow.setLayout(rowSetup);

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));

//add fields to rows

firstRow.add(accntNumLabel);

firstRow.add(pmtLabel);

secondRow.add(accntNum);

secondRow.add(pmt);

thirdRow.add(firstNameLabel);

thirdRow.add(lastNameLabel);

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("MMddyyyy");

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 then 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 (checkFields())

{

try

{

output.writeUTF(accntNum.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 ((accntNum.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

{

if ((accntNum.getText().compareTo("") !=10))

JOptionPane.showMessageDialog(null, "Account Number Wrong Length.", "Data Entry Error", JOptionPane.WARNING_MESSAGE);

accntNum.setText("");

if (state.getText().compareTo("") != 2)

JOptionPane.showMessageDialog(null, "Please only 2 letters for the state.", "Data Entry Error", JOptionPane.WARNING_MESSAGE);

state.setText("");

String pmtAmount = pmt.getText();

double pmtVal = Double.parseDouble(pmtAmount);

JOptionPane.showMessageDialog(null, "Please enter only numbers.", "Data Entry Error", JOptionPane.WARNING_MESSAGE);

String zipCode = zip.getText();

int zipCD = Integer.parseInt(zipCode);

JOptionPane.showMessageDialog(null, "please enter only numbers.", "Data Entry Error", JOptionPane.WARNING_MESSAGE);

return false;

}

}

public void clearFields()

{

//clear fields and reset the focus

accntNum.setText("");

pmt.setText("");

firstName.setText("");

lastName.setText("");

address.setText("");

city.setText("");

state.setText("");

zip.setText("");

accntNum.requestFocus();

}

}

dbrinea at 2007-7-12 9:47:11 >