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JCombobox becomes invisible after adding items to it

Paras Ahuja
Ranch Hand

Joined: May 22, 2012
Posts: 62

Hi everyone,
I have two comboboxes cb[0] and cb[1] stored in a file. The contents of cb[1] depend on the selected item of cb[0] as follows:

Now, i have another class to add items to either of the boxes (cb[0] or cb[1]). To add item to cb[1], first you have to select the cb[0] item ( hope you undestand why). After doing everything, i save the boxes in the same file from which i retrieve them.
Now the problem is, even after trying to add an item to cb[1], when i run the class that displays the comboboxes, making any change on cb[0] makes cb[1] invisible.
Can't undertsnad why? Please help.....
Michael Dunn
Ranch Hand

Joined: Jun 09, 2003
Posts: 4632
> Please help.....

you would need to post a small demo program that displays the problem.

this shouldn't affect anything, but might, depending on the rest of the code
if(sel.equals("Wired")); //<------remove the semi-colon (from both if's)

the (better) way of changing the contents of the combo is
DefaultComboBoxModel model = new DefaultComboBoxModel();
add all the items to the model

you could even pre-load the various models, then just set them if selected

I agree. Here's the link:
subject: JCombobox becomes invisible after adding items to it
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