ns1

Q1]

public class Main extends Thread
{
char c;
public void run()
{
for(c = 'A'; c<='Z';c++)
{
System.out.println(""+c);
try

{
Thread.sleep(3000);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
public static void main(String args[])
{
Main t = new Main();
t.start();
}
}

Q2]

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

public class EmployeeDetailsForm extends JFrame implements ActionListener {
JLabel label1, label2, label3, label4;
JTextField textField1, textField2, textField3, textField4;
JButton button;

public EmployeeDetailsForm() {
    label1 = new JLabel("Employee Number:");
    label1.setBounds(50, 50, 150, 20);
    
    label2 = new JLabel("Employee Name:");
    label2.setBounds(50, 80, 150, 20);
    
    label3 = new JLabel("Designation:");
    label3.setBounds(50, 110, 150, 20);
    
    label4 = new JLabel("Salary:");
    label4.setBounds(50, 140, 150, 20);
    
    textField1 = new JTextField();
    textField1.setBounds(200, 50, 150, 20);
    
    textField2 = new JTextField();
    textField2.setBounds(200, 80, 150, 20);
    
    textField3 = new JTextField();
    textField3.setBounds(200, 110, 150, 20);
    
    textField4 = new JTextField();
    textField4.setBounds(200, 140, 150, 20);
    
    button = new JButton("Submit");
    button.setBounds(150, 180, 100, 30);
    button.addActionListener(this);
    
    add(label1);
    add(label2);
    add(label3);
    add(label4);
    add(textField1);
    add(textField2);
    add(textField3);
    add(textField4);
    add(button);
    
    setSize(400, 300);
    setLayout(null);
    setVisible(true);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

public void actionPerformed(ActionEvent e) {
    if (e.getSource() == button) {
        String eno = textField1.getText();
        String ename = textField2.getText();
        String designation = textField3.getText();
        String salary = textField4.getText();
        
        try {
            Connection con = DriverManager.getConnection("jdbc:postgresql:database-name:postgres:postgres);
            PreparedStatement stmt = con.prepareStatement("INSERT INTO employee (eno, ename, designation, salary) VALUES (?, ?, ?, ?)");
            stmt.setString(1, eno);
            stmt.setString(2, ename);
            stmt.setString(3, designation);
            stmt.setString(4, salary);
            
            int rowsAffected = stmt.executeUpdate();
            if (rowsAffected > 0) {
                JOptionPane.showMessageDialog(this, "Employee details added successfully!");
                textField1.setText("");
                textField2.setText("");
                textField3.setText("");
                textField4.setText("");
            } else {
                JOptionPane.showMessageDialog(this, "Failed to add employee details!");
            }
            
            con.close();
        } catch (Exception ex) {
            JOptionPane.showMessageDialog(this, "Error: " + ex.getMessage());
        }
    }
}

public static void main(String[] args) {
    new EmployeeDetailsForm();
}

}