make JList Visible even if there isn't anything to display
<p>I am working on an assignment which requires the use of <code>JList</code>. </p>

<p>Basically it is an ordering shopping cart. I have 2 lists: one which has all of the items available to be purchased, and a second which holds the items that are "added" to the cart. It all works pretty well. However, I am having a tough time figuring out how to display the empty cart list when there aren't any items in it yet. I have an empty <code>Panel</code> until it's filled. </p>

<p>How can I make it visible all the time?</p>
