public void update(String[] columnsArray, String[] valuesArray, String whereColumn, String whereValue, String table){
        String sql = "UPDATE " + table + " SET ";
        for (int i = 0; i < columnsArray.length; i++) {
            sql += columnsArray[i] + " = " + valuesArray[i] + ", ";
        }
        sql = sql.substring(0, sql.length() - 2);
        sql += " WHERE " + whereColumn + " = " + whereValue;
        System.out.println(sql);
        try{
            stmt = conn.createStatement();
            stmt.executeQuery(sql);
        } catch (SQLException e) {
            System.out.println(e.getMessage());
        }

    }