E10_StudentReg.

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

class MyFrame extends JFrame {

  private Container c;
  private JLabel title;
  private String[] dates;
  private String[] months;
  private String[] years;

  private JLabel nameLabel;
  private JTextField nameField;

  private JLabel rollNumberLabel;
  private JTextField rollNumberField;

  private JLabel dobLabel;
  private JComboBox<String> dayComboBox;
  private JComboBox<String> monthComboBox;
  private JComboBox<String> yearComboBox;

  private JLabel classLabel;
  private JTextField classField;

  private JButton registerButton;

  private JTextArea textArea;

  public MyFrame() {
    setTitle("Registration Form:");
    setBounds(300, 90, 900, 700);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setResizable(false);

    c = getContentPane();
    c.setLayout(null);

    // Title
    title = new JLabel("Registration Form:");
    title.setSize(300, 30);
    title.setLocation(300, 30);
    c.add(title);

    // Name Field
    nameLabel = new JLabel("Name:");
    nameLabel.setBounds(50, 70, 100, 30);
    c.add(nameLabel);
    nameField = new JTextField();
    nameField.setBounds(160, 70, 200, 30);
    c.add(nameField);

    // Roll Number Field
    rollNumberLabel = new JLabel("Roll Number:");
    rollNumberLabel.setBounds(50, 110, 100, 30);
    c.add(rollNumberLabel);
    rollNumberField = new JTextField();
    rollNumberField.setBounds(160, 110, 200, 30);
    c.add(rollNumberField);

    // Date of Birth Field
    dobLabel = new JLabel("Date of Birth:");
    dobLabel.setBounds(50, 150, 100, 30);
    c.add(dobLabel);
    dates = new String[32];
    months =
      new String[] {
        "",
        "Jan",
        "Feb",
        "Mar",
        "Apr",
        "May",
        "Jun",
        "July",
        "Aug",
        "Sep",
        "Oct",
        "Nov",
        "Dec",
      };
    years = new String[26];
    for (int i = 0; i <= 25; i++) {
      dates[i] = Integer.toString(i);
      years[i] = Integer.toString(1995 + i);
    }
    dayComboBox = new JComboBox<>(dates);
    dayComboBox.setBounds(160, 150, 50, 30);
    c.add(dayComboBox);
    monthComboBox = new JComboBox<>(months);
    monthComboBox.setBounds(220, 150, 60, 30);
    c.add(monthComboBox);
    yearComboBox = new JComboBox<>(years);
    yearComboBox.setBounds(290, 150, 70, 30);
    c.add(yearComboBox);

    // Class Field
    classLabel = new JLabel("Class:");
    classLabel.setBounds(50, 190, 100, 30);
    c.add(classLabel);
    classField = new JTextField();
    classField.setBounds(160, 190, 200, 30);
    c.add(classField);

    // Register Button
    registerButton = new JButton("Register");
    registerButton.setBounds(160, 230, 100, 40);
    c.add(registerButton);

    // Registration Data Display
    textArea = new JTextArea(10, 40);
    textArea.setBounds(50, 300, 400, 200);
    textArea.setEditable(false);
    c.add(textArea);

    // Action Listener for Register Button
    registerButton.addActionListener(
      new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
          String name = nameField.getText();
          String rollNumber = rollNumberField.getText();
          String dob =
            dayComboBox.getSelectedItem() +
            " " +
            monthComboBox.getSelectedItem() +
            " " +
            yearComboBox.getSelectedItem();
          String className = classField.getText();

          String registrationData =
            "Name: " +
            name +
            "\nRoll Number: " +
            rollNumber +
            "\nDate of Birth: " +
            dob +
            "\nClass: " +
            className +
            "\n\n";
          textArea.append(registrationData);

          // Clear the input fields
          nameField.setText("");
          rollNumberField.setText("");
          dayComboBox.setSelectedIndex(0);
          monthComboBox.setSelectedIndex(0);
          yearComboBox.setSelectedIndex(0);
          classField.setText("");
        }
      }
    );
  }
}

public class StudentRegistrationForm {

  public static void main(String[] args) {
    MyFrame frame = new MyFrame();
    frame.setVisible(true);
  }
}