!rant

How do I set a default value for a dropdown if no option is selected?

I tried
<option value="">Select one option</option>
or value="0"

It gives me a NullPointerException

Set a disabled option as default, maybe?
Don't forget to set it selected.

I can't remember exactly but I think it's something like that

@lostinmyworld
It is disabled

@DivineInfinity <option selected="selected">

Does it have that?

@lostinmyworld Yes

@DivineInfinity
Does your <select> have name or id? One of them is mandatory if I recall it correctly
How do you take it?

@lostinmyworld It has both.
I take it with its id.

@DivineInfinity
Check if you spell it correctly. Can you test it from a browser to see with F12 if it has what you need?

If all your answers are yes, then I don't know. Maybe it has to do with how you call your Java thing.

@lostinmyworld Everything is spelled correctly. It works only when I select an option.

Should work if you give a name to the select tag and use selected attribute on the option you want as your default.

@surgiie It doesn't work.