HandList.java

x.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent ev) {
      // notice we do nothing, this is an event on a stateless component of the renderer
       xWasClicked = true;
    }
});

list.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent ev) {
       if(xWasClicked) {
         xWasClicked = false;
         // handle the button click event and return
         return;
       }
       // handle standard list action event
    }
});