Java ide installation (Sun)

[John Dangler]

I'm trying to install Sun Studio 8.1 .
I've run update-alternatives, and selected the sun java 1-5r11 as my
jdk.

During the first part of the install, the sun studio installer script
asks for the location of the jdk (it doesn't find one on the system).

I'm trying to find the location of the jdk, but can't seem to locate it.
apt-cache show sun-java5-jdk doesn't tell me where it was installed, and
a locate sun-java5-jdk shows 98% of the entries in /usr/share/doc, so I
don't think it's there.

Does anyone know what location the installer might want?
(I've read through the installation docs, but they don't say anything
other than the obvious -- "if the dialog shows no jdk, just navigate to
where your jdk is installed and provide that path")