Is it possible to create an array field?

Hi my name is Erik,

I am trying to create an array field to calculated a

loan amortization form?

I this possible, is there any way to use the java array code? 

I would like to apologize for the inconvenience, unfortunately, there is no way you can use java array code directly to Jotform. However, the closest that you may use is to send submission to your MySQL Database using PHP.

Here are some guide that might be useful to you:

How-to-send-Submissions-to-Your-MySQL-Database-Using-PHP

Send-POST-Data-From-JotForm-Using-PHP-in-Custom-Thank-You-Page

Thank you.