RegistrationFormToFile.java

import javax.swing.*;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class RegistrationFormToFile {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Registration Form to file");
        frame.setSize(500, 500);
        frame.setLayout(null);

        JLabel usernameLabel = new JLabel("Username:");
        usernameLabel.setBounds(10,10,100,20);
        frame.add(usernameLabel);
        JTextField usernameField = new JTextField();
        usernameField.setBounds(100,10,200,20);
        frame.add(usernameField);

        JLabel emailLabel = new JLabel("Email:");
        emailLabel.setBounds(10,40,100,20);
        frame.add(emailLabel);
        JTextField emailField = new JTextField();
        emailField.setBounds(100,40,200,20);
        frame.add(emailField);

        JLabel phoneLabel = new JLabel("Phone:");
        phoneLabel.setBounds(10,70,100,20);
        frame.add(phoneLabel);
        JTextField phoneField = new JTextField();
        phoneField.setBounds(100,70,200,20);
        frame.add(phoneField);

        JLabel genderLabel = new JLabel("Gender:");
        genderLabel.setBounds(10,100,100,20);
        frame.add(genderLabel);
        JRadioButton male = new JRadioButton("Male");
        male.setBounds(100,100,70,20);
        frame.add(male);
        JRadioButton female = new JRadioButton("Female");
        female.setBounds(170,100,70,20);
        frame.add(female);
        ButtonGroup genderGroup = new ButtonGroup();
        genderGroup.add(male);
        genderGroup.add(female);

        JLabel countryLabel = new JLabel("Country:");
        countryLabel.setBounds(10,130,100,20);
        frame.add(countryLabel);
        String[] countries = {"Select","Bangladesh","India","Pakistan","Afghanistan","Saudi Arabia","Palestine","Iran"};
        JComboBox<String> countryComboBox = new JComboBox<>(countries);
        countryComboBox.setBounds(100,130,100,20);
        frame.add(countryComboBox);

        JLabel DOBLabel = new JLabel("Date of Birth:");
        DOBLabel.setBounds(10,160,100,20);
        frame.add(DOBLabel);
        String[] days = new String[31];
        for (int i = 1; i <= 31; i++) {
            days[i-1] = String.valueOf(i);
        }
        String[] months = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
        String[] years = new String[100];
        for (int i = 0; i < 100; i++) {
            years[i] = String.valueOf(2025-i);
        }
        JComboBox<String> dayComboBox = new JComboBox<>(days);
        dayComboBox.setBounds(100,160,50,20);
        JComboBox<String > monthComboBox = new JComboBox<>(months);
        monthComboBox.setBounds(150,160,50,20);
        JComboBox<String> yearComboBox = new JComboBox<>(years);
        yearComboBox.setBounds(200,160,60,20);
        frame.add(dayComboBox);
        frame.add(monthComboBox);
        frame.add(yearComboBox);

        JLabel fileLabel = new JLabel("Profile Picture:");
        fileLabel.setBounds(10,190,100,20);
        frame.add(fileLabel);
        JButton uploadButton = new JButton("Choose file");
        uploadButton.setBounds(100,190,100,20);
        frame.add(uploadButton);
        JLabel filePathLabel = new JLabel("");
        filePathLabel.setBounds(100,220,300,20);
        frame.add(filePathLabel);

        final String[] selectedFilePath = {""};
        uploadButton.addActionListener(e -> {
            JFileChooser fileChooser = new JFileChooser();
            int returnValue = fileChooser.showOpenDialog(frame);
            if(returnValue == JFileChooser.APPROVE_OPTION) {
                File file = fileChooser.getSelectedFile();
                selectedFilePath[0] = file.getAbsolutePath();
                filePathLabel.setText(file.getName());
            }
        });

        JButton submitButton = new JButton("Submit");
        submitButton.setBounds(100,250,80,20);
        frame.add(submitButton);

        submitButton.addActionListener(e -> {
            String username = usernameField.getText();
            String email = emailField.getText();
            String phone = String.valueOf(phoneField.getText());
            String gender = male.isSelected() ? "Male" : female.isSelected() ? "Female" : "Not Selected";
            String country = (String) countryComboBox.getSelectedItem();
            String dateOfBirth = dayComboBox.getSelectedItem()+" "+monthComboBox.getSelectedItem()+","+yearComboBox.getSelectedItem();
            String photo = selectedFilePath[0].isEmpty() ? "Not uploaded" : selectedFilePath[0];

            if(username.isEmpty() ||  email.isEmpty() ||  phone.isEmpty() || gender.equals("Not Selected") || country.equals("Select") || photo.equals("Not uploaded") ) {
                JOptionPane.showMessageDialog(frame, "Please fill all the fields","Error",JOptionPane.ERROR_MESSAGE);
            } else {
                try {
                    FileWriter writer = new FileWriter("registration_data.txt",true);
                    writer.write("Username: " + username
                            + "\nEmail: " + email
                            + "\nPhone: " + phone
                            + "\nGender: " + gender
                            + "\nCountry: " + country
                            + "\nDate of Birth: " + dateOfBirth
                            + "\nPhoto: " + photo
                            + "\n--------------------------------------------------------------------------\n"
                    );
                    writer.close();

                    JOptionPane.showMessageDialog(frame, "Registration Saved Successfully!", "Success", JOptionPane.INFORMATION_MESSAGE);

                    usernameField.setText("");
                    emailField.setText("");
                    phoneField.setText("");
                    genderGroup.clearSelection();
                    countryComboBox.setSelectedIndex(0);
                    dayComboBox.setSelectedIndex(0);
                    monthComboBox.setSelectedIndex(0);
                    yearComboBox.setSelectedIndex(0);
                    filePathLabel.setText("");
                    selectedFilePath[0] = "";
                } catch (IOException exception) {
                    JOptionPane.showMessageDialog(frame, "Error writing to file!", "Error", JOptionPane.ERROR_MESSAGE);
                    exception.printStackTrace();
                }
            }
        });
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}