public void valueChanged(ListSelectionEvent e) {
        if (e.getValueIsAdjusting() == false) {
        	int selectedIdx = list.getSelectedIndex();
        	
            if (selectedIdx == -1) {
            	//No selection, disable fire button.
                unfollowButton.setEnabled(false);
 
            } else {
            	if (rsltCnt > 0) {
	    	        //Selection, enable the fire button.
	                unfollowButton.setEnabled(true);
            	}
	        }
        }
    }