javaFX中插入数据库上的java lang空指针异常

Question

 @FXML
private void ekle() throws Exception{



    try{
        Connection conn2 = dc.getConnection();
    pst=conn2.prepareStatement(query_ekle);
    pst.setString(1, text_no.getText());
    pst.setString(2, text_stok.getText());
    pst.setString(3, text_tarih.getText());
    pst.setString(4, text_garanti.getText());
    pst.setString(5, text_marka.getText());
    pst.setString(6, text_model.getText());
    pst.setString(7, text_aile.getText());
    pst.setString(8, text_hiz.getText());
    pst.setString(9, text_bellek.getText());
    pst.setString(10, text_cekirdek.getText());
    pst.setString(11, text_soket.getText());
    pst.setString(12, text_watt.getText());
    pst.setString(13, text_ie.getText());
    pst.setString(14, text_ug.getText());
    pst.execute();
    pst.close();
    } catch(Exception e){
        System.out.println(e);
    }

}

////////////////////////////////////////////////////////////////////

private connect dc = new connect();


    Connection conn3;
PreparedStatement pst=null;

////////////////////////////////////////////////////////////////

String query_ekle="INSERT INTO urunler(u_no,u_stok_miktari,u_alindigi_tarih,u_garanti_suresi,u_marka,u_modeli,u_ailesi,"
            + "u_hizi,u_bellek,u_cekirdek,u_soket,u_watt,ie_no,ug_no) Values('?','?','?','?','?','?','?','?','?','?','?','?','?','?')";

///////////////////////////////////////////////////////////////////
public class connect {

    private String url="jdbc:mysql://localhost:3306/";
    private String dbAdi="my_database1";
    private String userAdi="root";
    private String userPass="14907";

    public Connection getConnection() throws Exception{
         try{

             Class.forName("com.mysql.jdbc.Driver");
            Connection connection=(Connection) DriverManager.getConnection(url+dbAdi,userAdi,userPass);
            return connection;
         }catch(Exception e){
             System.out.println(e);
         }
            return null;
        }
}

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