Get Log work's Time Spent field name

[Scheibli Márk]

Hi!

I am developing in Java at the moment and i want to get the Time Spent's field value of the log work dialog. My problem is that i can't get the Time Spent field's name, and i should be able to get it, because i want to get the value with 

fieldManager.getCustomFieldObjectsByName()

My question is that how can i get the value of the Time Spent field or the name of that.

Please guide me if it's possible.