public void categorier() { String sql = "SELECT * FROM categorier"; try (Statement stmt = conn.createStatement(); ResultSet rs = stmt.executeQuery(sql); ) { // System.out.println("uniter Table:"); while (rs.next()) { Categorier categorier = new Categorier(); categorier.setIdcat(rs.getInt("idcat")); categorier.setNomCategorier(rs.getString("nomcat")); categorier.setIduniter(rs.getInt("iduniter")); CategorierList.add(categorier); } } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } }