title: How to get JComboBox last ( previous) selection state
body: <p>I know that subscribing for <code>ItemListener</code> on the checkbox one can get the <code>ItemEvent.SELECTED/DESELECTED</code> state inside the method:</p>
  
  <pre><code>public void itemStateChanged(ItemEvent e) {
      if(e.getStateChange()==ItemEvent.DESELECTED){
      }
  ....
  }
  </code></pre>
  
  <p>But what I want to know is the "last selection state" that  the JComboBox during the state-change is actually happening. As <code>JCheckBox</code> extends <code>JToggleButton</code> , there must me some way to know that as the java buttons do have an intermediate state-value like "pressed" before it actuallly changed to the new state. But I coudn't find out the way to have it in case of <code>JCheckBox</code> </p>