Ejemplo DB MySQL

try
  {
   Class.forName("com.mysql.jdbc.Driver");
   Connection conexion = DriverManager.getConnection ("jdbc:mysql://"+db_host+"/"+db_name,db_user, db_pass);

   Statement s = conexion.createStatement();
   ResultSet rs = s.executeQuery ("SELECT * FROM pnj_cuentas");

   while(rs.next())
   {
       System.out.println (rs.getString (1) + " " + rs.getString (2));
   }
  }
  catch (Exception e)
  {
     System.out.println(e.getMessage());
 try
  {
   Class.forName("com.mysql.jdbc.Driver");
   Connection conexion = DriverManager.getConnection ("jdbc:mysql://"+db_host+"/"+db_name,db_user, db_pass);

   Statement s = conexion.createStatement();
   ResultSet rs = s.executeQuery ("SELECT * FROM pnj_cuentas");

   while(rs.next())
   {
       System.out.println (rs.getString (1) + " " + rs.getString (2));
   }
  }
  catch (Exception e)
  {
     System.out.println(e.getMessage());
  }