What is the problem in the next Java / SQL code sequence?

I updated the table in the access through Java code, but it didn't work However, when I print the result of executeupdate () to the console, it shows me 1, but there is no change in the database Can you tell me what the problem is?

System.out.println("here");
PreparedStatement st = conn.prepareStatement(
    "UPDATE StocProduseCuFactura SET cantitate = " +
    "cantitate - ? WHERE nume = ? and um = 'buc'");
st.setInt(1,cant);
st.setString(2,p.getNume());
System.out.println(st.executeUpdate());
st.close();

I forgot to say that if I run the SQL code in the access, it will work

Solution

Do you ensure that the transaction has been submitted?