public void insert(String[] columnsArray, String[] valuesArray, String table){
        String columns = String.join(", ", columnsArray);
        String values = String.join(", ", columnsArray);

        String sql = "INSERT INTO " + table + " (" + columns + ") VALUES (" + values + ") ";
        try{
            stmt = conn.createStatement();
            stmt.executeQuery(sql);
        } catch (SQLException e) {
            System.out.println(e.getMessage());
        }
    }