1. First install JDK with no default.
   # pkgadd -d . -a /export/default SUNW6rt SUNWj6dev SUNWj6cfg SUNWj6man
   # pkgadd -d . -a /export/default SUNWj6rtx SUNWj6dvx SUNWj6dmx
SUNWj6dmo

2. Reinstall JDK with Default.
   # pkgadd -d . SUNWj6rt SUNWj6dev SUNWj6cfg SUNWj6man SUNWj6dmo

Processing package instance <SUNWj6rt> from </export/yy>

JDK 6.0 Runtime Env. (1.6.0_07)(i386) 1.6.0,REV=2006.11.29.05.03
Copyright 2008 Sun Microsystems, Inc. All rights reserved.
Use is subject to license terms.

This appears to be an attempt to install the same architecture and
version of a package which is already installed. This installation
will attempt to overwrite this package.

Using </usr/local> as the package base directory.
## Processing package information.
## Processing system information.
   799 package *pathnames are already properly installed*. <------Overwrite (Y/N)” message appears, even though destination directories aren't the same and jdk installation with nondefault is successful