title: Transfer Items from One JComboBox to another JComboBox
body: <p>Hi I'm trying to transfer one object from one combobox to another and vice versa.
  To accomplish this,
  I use actionListeners or ItemListeners, to no luck that they dont answer my problems, or maybe there's just something wrong in my implementation.</p>
  
  <p>Assuming we have to comboboxes, combobox1 and combobox2.
  Basically, 
  1. I first add the selected item to another combobox (combobox2)
  2. I remove the selected item on the first combobox (combobox1)</p>
  
  <p>When trying to debug this, i found out that everytime i am on the step of removing items, the listener of the other combobox fires, which does the same steps as above. This results into a loop, that just deletes the item, and places it back to the original combobox.</p>
  
  <p>When using the ItemListener, with the proper if conditions of being selected or not, it throws a bigger error. Guys please help me..</p>
  
  <p>*on edit mode/currently making an SSCE</p>