Keyboard support - Is there a way to define unrecognised keys

I have creative prodikeys keyboard. Java seems to only support a known set of keys. There has to be a way to define new ones. I having trouble believing that it cant be done.

Thanks Gianni Ceresa. On my config I needed a slightly different syntax, changing TAB to [9]. This is what I ended up changing in ~/.sqldeveloper/system4.1.0.18.37/o.ide.12.2.1.0.42.150219.1051/settings.xml:
              <Item class="oracle.javatools.util.Pair">
                  <first class="java.lang.String">Ide.NEXT_EDITORFRAME_CMD_ID</first>
                  <second class="oracle.ide.keyboard.KeyStrokes">
                     <data>
                        <Item class="javax.swing.KeyStroke">control [9]</Item>
                     </data>
                  </second>
               </Item>
               <Item class="oracle.javatools.util.Pair">
                  <first class="java.lang.String">Ide.PREV_EDITORFRAME_CMD_ID</first>
                  <second class="oracle.ide.keyboard.KeyStrokes">
                     <data>
                        <Item class="javax.swing.KeyStroke">shift control [9]</Item>
                     </data>
                  </second>
               </Item>
But now nothing happens when I press Ctrl-Tab, until I press Tab again (with ctrl still held) when I get this popup menu:
I can tab back and forth on the list to choose the doc I want -- but this is not the immediate & responsive interaction that I'm looking to replicate - quickly flicking between tabs that are open, just as one would with eg. Chrome.

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