PreparedStatement in JDBC with MySQL

import java.sql.*;

public class Mysql_insertDemo

{

    public static void main(String[] args)

    {

        try

        {

                Class.forName("com.mysql.jdbc.Driver");

                System.out.println("Driver is loaded");

                Connection c = DriverManager.getConnection("jdbc:mysql://localhost:3306/java2all","root","kamal");

                System.out.println("Connection created");

                String s = "insert into data (id,name,city,age) values (?,?,?,?)";

                PreparedStatement ps = c.prepareStatement(s);

                ps.setInt(1, 6);

                ps.setString(2, "J2EE");

                ps.setString(3, "AAA");

                ps.setInt(4, 55);

                ps.execute();

                c.close();

                System.out.println("Inserted");

        }

        catch(Exception e)

        {

                System.out.println("Exception : " +e);

                 

        }  

    }

}