public String GetPatient() {
        Preferences pref;
        pref = Preferences.userNodeForPackage(Database.class);
        String sIDzoek = pref.get("Patiënt_ID", "");
        String sresult = null;
        try {
            Statement stmt = this.conn.createStatement();
            ResultSet rs;
            if (stmt.execute("SELECT * FROM patient Where Patiënt_ID  ='" + sIDzoek + "'")) {
                rs = stmt.getResultSet();
                while (rs.next()) {
                    sresult = rs.getString("naam");
                }
            }
            return sresult;
        } catch (SQLException e) {
            System.out.println(e);
            return null;
        }
    }