Simple Java: if dropdown option x is selected, return y immediately

Yes. omg. 

Field validation wouldn't work because the calculation performed the moment the user input was commited. 

Same with Format script. 

With your solution, I just have to prioritize this field in the calculation order

Thank you.

RE: "odd request": you're absolutely right. 🙂 The unselectable option was included to serve as a field label for the user. Many of the fields are not labeled externally, but contain a "label" within, in the form of an unselectable item. So far, it is a clean solution for the purpose.

How do I write a script with the same functionality as above, but to include in my main calculation event?

In otherwords, if my main calculation triggers whenever any field is changed, how can I include in that script a bit that triggers only if fund1 is changed? I hope that is clear.

Thanks for your quick response. I'm lacking the correct terminology here.

In dropdown properties of fund1, the First item reads:

Item: String

Export Value: 0

The Second item in the list reads:

Item: String 2

Export Value: 10

I want to show the Second item if the First item is selected by the user. (Sometimes scripts involving dropdown refer to the export value, and sometimes to the 'item' or face value, as I believe it is called. This is not entirely clear to me.)