title: Extending variable scope from one frame to another frame
body: <p>I have two <code>JFrame</code> based windows: <code>SeatLayout</code> and <code>BillSummary</code>. I need to get the <code>seatnumber</code>  from the <code>SeatLayout</code> frame and display it in <code>BillSummary</code> but the variable scope is limited to the first frame. </p>
  
  <p>How can I do this?</p>