I have a JComboBox that displays 2 columns. Now I would like to enable to search by key on all columns. Example:

```
Column1 | Column2
A1      | S1
A2      | B1
A3      | P1

```

The search by key on the first column works fine with default Implementation of KeySelectionManager for JComboBox. However, I would also like to be able to search for the second column as well, meaning when I press 'B' the second item is selected. 

I have taken a look at the KeySelectionManager but didn't find anything useful. I have attached a screenshot of the ComboBox to show what I mean. 

Thanks for any pointers. 

[![enter image description here](https://i.stack.imgur.com/jHToR.png)](https://i.stack.imgur.com/jHToR.png)