JRE -CLASSPATH causing problem

tahirghafoor · 03-27-2006, 07:57 AM

hello everybody!
i am newbe... i want to be sure if java is install on my RHE AS 4.
while i am trying to install an application its stops and give error at JRE -CLASSPATH command.
how i can check if JRE command is working properly

Thanking you for your time and efforts.

Regards,

timmeke · 03-27-2006, 08:51 AM

"jre" is the Java Runtime Environment. It's not a single program, but a collection of library files, programs, documentation and much more.

If you get an error regarding "CLASSPATH", you may not have correctly set the $CLASSPATH environment variable.
This variable is used to tell the system where it can find your Java environment.

Try:

Code:

echo $CLASSPATH

for starters.

If that doesn't give you any result, try looking at the installation notes on Sun's java.com site.
http://www.java.com/en/download/manual.jsp (for the latest Java version).

tahirghafoor · 03-27-2006, 11:45 PM

hi timmeke!
thanks for your response
i tried echo $CLASSPATH but nothing happened.
so, does it mean either java is not installed properly or classpath variable not defined properly. Any clue? suggestion....
Regards

timmeke · 03-28-2006, 12:52 AM

To find out if you have installed Java, try:

Code:

whereis java

Those commands try to locate (you could try "locate" instead of "whereis" too) the java interpreter.
If Java is installed, the whereis command should print out something like
"/usr/bin/java"
If the whereis command can't locate the java interpreter, either $PATH is wrong or you don't have java installed.

You could also do:

Code:

ls -l /usr/java

since that's where java gets installed by default, I believe.