Who set my CLASSPATH?

I never set CLASSPATH environment variable. Instead I always use the explicit -classpath or -cp options when running java, javac, javap, etc. The other day I was surprised to see a CLASSPATH environment variable is set:

C:\tmp> set CLASSPATH
CLASSPATH=.;C:\Program Files\Java\jre1.5.0_09\lib\ext\QTJava.zip

C:\tmp> dir "C:\Program Files\Java\jre1.5.0_09\lib\ext\QTJava.zip"
06/12/2006  09:57 AM         1,180,476 QTJava.zip

It seems when I installed apple's quicktime plugin, it automatically set this CLASSPATH in my environment. I don't like this. I always assume a clean environment when running any java applications. So I removed it:

C:\tmp> set CLASSPATH=

C:\tmp> set CLASSPATH
Environment variable CLASSPATH not defined

I can tolerate an installer modifying my PATH, but not CLASSPATH.

Tags: java, classpath, QTJava