[Building Sakai] Error shows in the code atfer building project

[gayan sukumal wiharagoda]

Hi All,
I got an error in
/sakai-kernel-util/src/main/java/org/sakaiproject/content/util/ZipContentUtil.java.I
have mention it below.

Access restriction: The type MimetypesFileTypeMap is not accessible due to
restriction on required
 library /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/rt.jar

I got this error from following line.
import javax.activation.MimetypesFileTypeMap;

Regards,
Gayan.
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