Deployment.user.cachedir

Question

I am trying to find deployment.user.cachedir System property from an applet. When I use System.getProperty"deployment.user.cachedir"); it returns null. However, I can list it out in the Java Console by dumping the environment (S) while my applet is running. Any ideas on how to get this to work?
deployment.system.profile = C:\WINDOWS
deployment.system.security.policy = file:/C:/WINDOWS/Sun/Java/Deployment/security/java.policy
deployment.user.cachedir = C:\Documents and Settings\DSmaltz\Application Data\Sun\Java\Deployment\cache
deployment.user.certs = C:\Documents and Settings\DSmaltz\Application Data\Sun\Java\Deployment\security\deployment.certs
deployment.user.extdir = C:\Documents and Settings\DSmaltz\Application Data\Sun\Java\Deployment\ext
deployment.user.home = C:\Documents and Settings\DSmaltz\Application Data\Sun\Java\Deployment
deployment.user.jssecerts = C:\Documents and Settings\DSmaltz\Application Data\Sun\Java\Deployment\security\deployment.jssecerts
Thank You

Answer 1

Thank you for your response. I am using jdk1.3.1 and
jre 1.4.2_01 which I just downloaded the other day.
The properties did indeed list out in the console, but
I will check a previous jre to see if they are there
as well. I agree that if the property is available,
then it should return the value.5. What system properties can be read by applets, and how?
In both Java-enabled browsers and the appletviewer, applets can read these system properties by invoking System.getProperty(String key):
key               meaning
java.version          Java version number
java.vendor          Java vendor-specific string
java.vendor.url     Java vendor URL
java.class.version     Java class version number
os.name          Operating system name
os.arch          Operating system architecture
os.version     Operating system version
file.separator     File separator (eg, "/")
path.separator     Path separator (eg, ":")
line.separator     Line separator
Applets are prevented from reading these system properties:
key               meaning
java.home          Java installation directory
java.class.path     Java classpath
user.name          User account name
user.home          User home directory
user.dir          User's current working directory
To read a system property from within an applet, simply invoke System.getProperty(key) on the property you are interested in.
(http://java.sun.com/sfaq/#hideProps)
Br - Johan