I need to display a JTable.  In this case the width of each cell in the last
column varies - it's a collection of text & color swatches, represented by
JLabels and JPanels stuffed into a containing JPanel.

I can get a vertical scroll bar to appear by putting enough entries in the
table, but no matter what the width of my columns it never puts in a
horizontal scroll bar.  Yes, I can force one by setting AUTO_RESIZE_OFF but
then I *always* get a horizontal scrollbar, even when I don't need one.
Also, the table always starts out much too narrow to display the entire
line, scroll bar or not.  I'd really like to get either a scroll bar, or
for the table to resize wide enough to show the longest line.

The least-worst solution I've found so far is to force a scroll bar and add
a ComponentListener to listen for changes in the size of the JComponent
containing the JScrollPane, and resize the width of the last column
accordingly.

Is there a better way of doing horizontal scroll bars in a JTable?