// Methode untuk menginsert data node
    public void insertLelang(Object[] data) {
        try {
            String SQLInsert = "INSERT INTO dblelang.lelang (idlelang, namalelang, isilelang, waktu) " +
                    "VALUES ('','" + data[0] + "','" + data[1] + "','" + data[2] + "');";
            int stat = database.exeQuery(SQLInsert);
            if (stat == 0) {
                JOptionPane.showMessageDialog(null, "Data tidak dapat disimpan");
            }
        } catch (Exception e) {
        }
    }

    // Mengedit data di Basis data smsp table node
    public void editLelang(String id, Object[] data) {
        try {
            String SQLEdit = "UPDATE dblelang.lelang SET namalelang = '" + data[0] + "'," +
                    "isilelang = '" + data[1] + "',waktu = '" + data[2] + "' WHERE lelang.idlelang ='" + id + "'";
            int stat = database.exeQuery(SQLEdit);
            if (stat == 0) {
                JOptionPane.showMessageDialog(null, "Data tidak dapat diubah");
            }
        } catch (Exception e) {
        }
    }