public static void FillMusicType() {
   PreparedStatement ps = null;
   Connection conn;
   String sql = "INSERT INTO music_type (type_name) VALUES (?)";
   try {
     conn = ConnectToDB.getConnection();
     ps = conn.prepareStatement(sql);
     ps.setString(1, "Rock");
     ps.executeUpdate();
     ps.setString(1, "Rap");
     ps.executeUpdate();
     ps.setString(1, "Club");
     ps.executeUpdate();
     ps.setString(1, "Classic");
     ps.executeUpdate();
     ps.setString(1, "Jazz");
     ps.executeUpdate();
     ps.setString(1, "Funk");
     ps.executeUpdate();
   } catch (SQLException e1) {
     e1.printStackTrace();
   } finally {
     if (ps != null) {
       try {
         ps.close();
       } catch (Exception e) {
       }
     }
   }
 }
 public static void FillRole() {
   PreparedStatement ps = null;
   Connection conn;
   String sql = "INSERT INTO role (role_name) VALUES (?)";
   try {
     conn = ConnectToDB.getConnection();
     ps = conn.prepareStatement(sql);
     ps.setString(1, "Registered");
     ps.executeUpdate();
     ps.setString(1, "Moderator");
     ps.executeUpdate();
     ps.setString(1, "Administrator");
     ps.executeUpdate();
   } catch (SQLException e1) {
     e1.printStackTrace();
   } finally {
     if (ps != null) {
       try {
         ps.close();
       } catch (Exception e) {
       }
     }
   }
 }