Java SE (Java Platform, Standard Edition)

I'm new to swing. Our application is implemented in the NetBeans Platform. I'm using a JList to as the RowHeaderView in a JScrollPane that
holds a JTable. I have implemented a ListCellRenderer that makes the ListCells look the same as the TableHeader cells.

Everything works fine if I implement this outside of the NetBeans platform but when I move it back in I have problems. The main issue is making the borders look the same.

I use UIManager.getBorder("TableHeader.cellBorder") but this does not return the same border when in NetBeans.
I tried to get it directly from the JTable with table.getTableHeader().getBorder() but it returns null.

When I look at the TableHeaderRenderer in the debugger it is com.sun.java.swing.plaf.windows.WindowsTableHeader.XPDefaultRenderer and I can't find this in the API.

I know this is not the NetBeans forum but I have not gotten an answer from them and I'm hoping someone can enlighten me on the basic concept of what is going on, the border must be somewhere? If someone could point me to some documentation or give me a hint I would be very grateful.

Thanks,
Bill