LTP: XMLEncoder does not persist LineBorder properly

FULL PRODUCT VERSION :
java version "1.7.0-internal"
Java(TM) SE Runtime Environment (build 1.7.0-internal-sm162706_05_oct_2006_15_12-b00)
Java HotSpot(TM) Client VM (build 1.6.0-rc-b100, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP Professional Service Pack 2

A DESCRIPTION OF THE PROBLEM :
The javax.swing.border.LineBorder with rounded corners could not be encoded/decoded successfully.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Create new instance of LinBorder: new LineBorder( Color.RED, 2, true ).
2. Encode and decode created instance.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
<?xml version="1.0" encoding="UTF-8"?>
<java version="1.7.0-internal" class="java.beans.XMLDecoder">
 <object class="javax.swing.border.LineBorder">
  <object class="java.awt.Color">
   <int>255</int>
   <int>0</int>
   <int>0</int>
   <int>255</int>
  </object>
  <int>2</int>
  <boolean>true</boolean>
 </object>
</java>
ACTUAL -
<?xml version="1.0" encoding="UTF-8"?>
<java version="1.7.0-internal" class="java.beans.XMLDecoder">
 <object class="javax.swing.border.LineBorder">
  <object class="java.awt.Color">
   <int>255</int>
   <int>0</int>
   <int>0</int>
   <int>255</int>
  </object>
  <int>2</int>
 </object>
</java>