Please help to fix this code. It will not run and has compile errors. package ne

Question

Please help to fix this code. It will not run and has compile errors.

package net.codejava.swing.mail;

import java.awt.Font;

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.Insets;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.File;

import java.util.Properties;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JMenu;

import javax.swing.JMenuBar;

import javax.swing.JMenuItem;

import javax.swing.JOptionPane;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.JTextField;

import javax.swing.SwingUtilities;

import javax.swing.UIManager;

import net.codejava.swing.JFilePicker;

/**

* A Swing application that allows sending e-mail messages from a SMTP server.

* @author www.codejava.net

*

*/

public class SwingEmailSender extends JFrame {

    private ConfigUtility configUtil = new ConfigUtility();

     

    private JMenuBar menuBar = new JMenuBar();

    private JMenu menuFile = new JMenu("File");

    private JMenuItem menuItemSetting = new JMenuItem("Settings..");

     

    private JLabel labelTo = new JLabel("To: ");

    private JLabel labelSubject = new JLabel("Subject: ");

     

    private JTextField fieldTo = new JTextField(30);

    private JTextField fieldSubject = new JTextField(30);

     

    private JButton buttonSend = new JButton("SEND");

     

    private JFilePicker filePicker = new JFilePicker("Attached", "Attach File...");

     

    private JTextArea textAreaMessage = new JTextArea(10, 30);

     

    private GridBagConstraints constraints = new GridBagConstraints();

     

    public SwingEmailSender() {

        super("Swing E-mail Sender Program");

         

        // set up layout

        setLayout(new GridBagLayout());

        constraints.anchor = GridBagConstraints.WEST;

        constraints.insets = new Insets(5, 5, 5, 5);

     

        setupMenu();

        setupForm();

         

        pack();

        setLocationRelativeTo(null);    // center on screen

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    

    }

    private void setupMenu() {

        menuItemSetting.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent event) {

                SettingsDialog dialog = new SettingsDialog(SwingEmailSender.this, configUtil);

                dialog.setVisible(true);

            }

        });

         

        menuFile.add(menuItemSetting);

        menuBar.add(menuFile);

        setJMenuBar(menuBar);      

    }

     

    private void setupForm() {

        constraints.gridx = 0;

        constraints.gridy = 0;

        add(labelTo, constraints);

         

        constraints.gridx = 1;

        constraints.fill = GridBagConstraints.HORIZONTAL;

        add(fieldTo, constraints);

         

        constraints.gridx = 0;

        constraints.gridy = 1;

        add(labelSubject, constraints);

         

        constraints.gridx = 1;

        constraints.fill = GridBagConstraints.HORIZONTAL;

        add(fieldSubject, constraints);

         

        constraints.gridx = 2;

        constraints.gridy = 0;

        constraints.gridheight = 2;

        constraints.fill = GridBagConstraints.BOTH;

        buttonSend.setFont(new Font("Arial", Font.BOLD, 16));

        add(buttonSend, constraints);

         

        buttonSend.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent event) {

                buttonSendActionPerformed(event);

            }

        });

         

        constraints.gridx = 0;

        constraints.gridy = 2;

        constraints.gridheight = 1;

        constraints.gridwidth = 3;

        filePicker.setMode(JFilePicker.MODE_OPEN);

        add(filePicker, constraints);

         

        constraints.gridy = 3;

        constraints.weightx = 1.0;

        constraints.weighty = 1.0;

         

        add(new JScrollPane(textAreaMessage), constraints);    

    }

     

    private void buttonSendActionPerformed(ActionEvent event) {

        if (!validateFields()) {

            return;

        }

         

        String toAddress = fieldTo.getText();

        String subject = fieldSubject.getText();

        String message = textAreaMessage.getText();

         

        File[] attachFiles = null;

         

        if (!filePicker.getSelectedFilePath().equals("")) {

            File selectedFile = new File(filePicker.getSelectedFilePath());

            attachFiles = new File[] {selectedFile};

        }

         

        try {

            Properties smtpProperties = configUtil.loadProperties();

            EmailUtility.sendEmail(smtpProperties, toAddress, subject, message, attachFiles);

             

            JOptionPane.showMessageDialog(this,

                    "The e-mail has been sent successfully!");

             

        } catch (Exception ex) {

            JOptionPane.showMessageDialog(this,

                    "Error while sending the e-mail: " + ex.getMessage(),

                    "Error", JOptionPane.ERROR_MESSAGE);

        }

    }

     

    private boolean validateFields() {

        if (fieldTo.getText().equals("")) {

            JOptionPane.showMessageDialog(this,

                    "Please enter To address!",

                    "Error", JOptionPane.ERROR_MESSAGE);

            fieldTo.requestFocus();

            return false;

        }

         

        if (fieldSubject.getText().equals("")) {

            JOptionPane.showMessageDialog(this,

                    "Please enter subject!",

                    "Error", JOptionPane.ERROR_MESSAGE);

            fieldSubject.requestFocus();

            return false;

        }

         

        if (textAreaMessage.getText().equals("")) {

            JOptionPane.showMessageDialog(this,

                    "Please enter message!",

                    "Error", JOptionPane.ERROR_MESSAGE);

            textAreaMessage.requestFocus();

            return false;

        }

         

        return true;

    }

     

    public static void main(String[] args) {

        // set look and feel to system dependent

        try {

            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

        } catch (Exception ex) {

            ex.printStackTrace();

        }

         

        SwingUtilities.invokeLater(new Runnable() {

            @Override

            public void run() {

                new SwingEmailSender().setVisible(true);

            }

        });

    }

}

Explanation / Answer

You are missing the whole package of classes.

Here are the classes you need.

PROGRAM CODE:

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.util.Properties;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;

public class SettingsDialog extends JDialog {
private ConfigUtility configUtil;
private JLabel labelHost = new JLabel("Host name: ");
private JLabel labelPort = new JLabel("Port number: ");
private JLabel labelUser = new JLabel("Username: ");
private JLabel labelPass = new JLabel("Password: ");
private JTextField textHost = new JTextField(20);
private JTextField textPort = new JTextField(20);
private JTextField textUser = new JTextField(20);
private JTextField textPass = new JTextField(20);
private JButton buttonSave = new JButton("Save");
public SettingsDialog(JFrame parent, ConfigUtility configUtil) {
super(parent, "SMTP Settings", true);
this.configUtil = configUtil;
setupForm();
loadSettings();
pack();
setLocationRelativeTo(null);
}
private void setupForm() {
setLayout(new GridBagLayout());
GridBagConstraints constraints = new GridBagConstraints();
constraints.gridx = 0;
constraints.gridy = 0;
constraints.insets = new Insets(10, 10, 5, 10);
constraints.anchor = GridBagConstraints.WEST;
  
add(labelHost, constraints);
  
constraints.gridx = 1;
add(textHost, constraints);
  
constraints.gridy = 1;
constraints.gridx = 0;
add(labelPort, constraints);
  
constraints.gridx = 1;
add(textPort, constraints);

constraints.gridy = 2;
constraints.gridx = 0;
add(labelUser, constraints);
  
constraints.gridx = 1;
add(textUser, constraints);

constraints.gridy = 3;
constraints.gridx = 0;
add(labelPass, constraints);
  
constraints.gridx = 1;
add(textPass, constraints);
  
constraints.gridy = 4;
constraints.gridx = 0;
constraints.gridwidth = 2;
constraints.anchor = GridBagConstraints.CENTER;
add(buttonSave, constraints);
  
buttonSave.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent event) {
buttonSaveActionPerformed(event);
}
});
}

private void loadSettings() {
Properties configProps = null;
try {
configProps = configUtil.loadProperties();
} catch (IOException ex) {
JOptionPane.showMessageDialog(this,
"Error reading settings: " + ex.getMessage(),
"Error", JOptionPane.ERROR_MESSAGE);
}
  
textHost.setText(configProps.getProperty("mail.smtp.host"));
textPort.setText(configProps.getProperty("mail.smtp.port"));
textUser.setText(configProps.getProperty("mail.user"));
textPass.setText(configProps.getProperty("mail.password"));
}

private void buttonSaveActionPerformed(ActionEvent event) {
try {
configUtil.saveProperties(textHost.getText(),
textPort.getText(),
textUser.getText(),
textPass.getText());
JOptionPane.showMessageDialog(SettingsDialog.this,
"Properties were saved successfully!");
dispose();
} catch (IOException ex) {
JOptionPane.showMessageDialog(this,
"Error saving properties file: " + ex.getMessage(),
"Error", JOptionPane.ERROR_MESSAGE);
}
}
}

EmailUtility.java

import java.io.File;
import java.io.IOException;
import java.util.Date;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class EmailUtility {
public static void sendEmail(Properties smtpProperties, String toAddress,
String subject, String message, File[] attachFiles)
throws AddressException, MessagingException, IOException {
final String userName = smtpProperties.getProperty("mail.user");
final String password = smtpProperties.getProperty("mail.password");
  
// creates a new session with an authenticator
Authenticator auth = new Authenticator() {
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(userName, password);
}
};
Session session = Session.getInstance(smtpProperties, auth);

// creates a new e-mail message
Message msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(userName));
InternetAddress[] toAddresses = { new InternetAddress(toAddress) };
msg.setRecipients(Message.RecipientType.TO, toAddresses);
msg.setSubject(subject);
msg.setSentDate(new Date());
// creates message part
MimeBodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setContent(message, "text/html");

// creates multi-part
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messageBodyPart);

// adds attachments
if (attachFiles != null && attachFiles.length > 0) {
for (File aFile : attachFiles) {
MimeBodyPart attachPart = new MimeBodyPart();

try {
attachPart.attachFile(aFile);
} catch (IOException ex) {
throw ex;
}

multipart.addBodyPart(attachPart);
}
}

msg.setContent(multipart);

Transport.send(msg);

}
}

FileTypeFilter.java
package studentsupport9.blogspot.com;

import java.io.File;
import javax.swing.filechooser.FileFilter;

public class FileTypeFilter extends FileFilter {

private String extension;
private String description;

public FileTypeFilter(String extension, String description) {
this.extension = extension;
this.description = description;
}

@Override
public boolean accept(File file) {
if (file.isDirectory()) {
return true;
}
return file.getName().toLowerCase().endsWith(extension);
}

public String getDescription() {
return description + String.format(" (*%s)", extension);
}
}

JFilePicker.java

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class JFilePicker extends JPanel {
private String textFieldLabel;
private String buttonLabel;
private JLabel label;
private JTextField textField;
private JButton button;
private JFileChooser fileChooser;
private int mode;
public static final int MODE_OPEN = 1;
public static final int MODE_SAVE = 2;

public JFilePicker(String textFieldLabel, String buttonLabel) {
this.textFieldLabel = textFieldLabel;
this.buttonLabel = buttonLabel;
fileChooser = new JFileChooser();
setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
// creates the GUI
label = new JLabel(textFieldLabel);
  
textField = new JTextField(30);
button = new JButton(buttonLabel);
  
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent evt) {
buttonActionPerformed(evt);
}
});
  
add(label);
add(textField);
add(button);
  
}

private void buttonActionPerformed(ActionEvent evt) {
if (mode == MODE_OPEN) {
if (fileChooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
textField.setText(fileChooser.getSelectedFile().getAbsolutePath());
}
} else if (mode == MODE_SAVE) {
if (fileChooser.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
textField.setText(fileChooser.getSelectedFile().getAbsolutePath());
}
}
}

public void addFileTypeFilter(String extension, String description) {
FileTypeFilter filter = new FileTypeFilter(extension, description);
fileChooser.addChoosableFileFilter(filter);
}

public void setMode(int mode) {
this.mode = mode;
}

public String getSelectedFilePath() {
return textField.getText();
}

public JFileChooser getFileChooser() {
return this.fileChooser;
}
}

SettingsDialog.java

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.util.Properties;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;

public class SettingsDialog extends JDialog {
private ConfigUtility configUtil;
private JLabel labelHost = new JLabel("Host name: ");
private JLabel labelPort = new JLabel("Port number: ");
private JLabel labelUser = new JLabel("Username: ");
private JLabel labelPass = new JLabel("Password: ");
private JTextField textHost = new JTextField(20);
private JTextField textPort = new JTextField(20);
private JTextField textUser = new JTextField(20);
private JTextField textPass = new JTextField(20);
private JButton buttonSave = new JButton("Save");
public SettingsDialog(JFrame parent, ConfigUtility configUtil) {
super(parent, "SMTP Settings", true);
this.configUtil = configUtil;
setupForm();
loadSettings();
pack();
setLocationRelativeTo(null);
}
private void setupForm() {
setLayout(new GridBagLayout());
GridBagConstraints constraints = new GridBagConstraints();
constraints.gridx = 0;
constraints.gridy = 0;
constraints.insets = new Insets(10, 10, 5, 10);
constraints.anchor = GridBagConstraints.WEST;
  
add(labelHost, constraints);
  
constraints.gridx = 1;
add(textHost, constraints);
  
constraints.gridy = 1;
constraints.gridx = 0;
add(labelPort, constraints);
  
constraints.gridx = 1;
add(textPort, constraints);

constraints.gridy = 2;
constraints.gridx = 0;
add(labelUser, constraints);
  
constraints.gridx = 1;
add(textUser, constraints);

constraints.gridy = 3;
constraints.gridx = 0;
add(labelPass, constraints);
  
constraints.gridx = 1;
add(textPass, constraints);
  
constraints.gridy = 4;
constraints.gridx = 0;
constraints.gridwidth = 2;
constraints.anchor = GridBagConstraints.CENTER;
add(buttonSave, constraints);
  
buttonSave.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent event) {
buttonSaveActionPerformed(event);
}
});
}

private void loadSettings() {
Properties configProps = null;
try {
configProps = configUtil.loadProperties();
} catch (IOException ex) {
JOptionPane.showMessageDialog(this,
"Error reading settings: " + ex.getMessage(),
"Error", JOptionPane.ERROR_MESSAGE);
}
  
textHost.setText(configProps.getProperty("mail.smtp.host"));
textPort.setText(configProps.getProperty("mail.smtp.port"));
textUser.setText(configProps.getProperty("mail.user"));
textPass.setText(configProps.getProperty("mail.password"));
}

private void buttonSaveActionPerformed(ActionEvent event) {
try {
configUtil.saveProperties(textHost.getText(),
textPort.getText(),
textUser.getText(),
textPass.getText());
JOptionPane.showMessageDialog(SettingsDialog.this,
"Properties were saved successfully!");
dispose();
} catch (IOException ex) {
JOptionPane.showMessageDialog(this,
"Error saving properties file: " + ex.getMessage(),
"Error", JOptionPane.ERROR_MESSAGE);
}
}
}

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