jar files

I tried to extract the files from xp.jar using the following command from the dos prompt:

c:\jdk1.3.1\bin\jar xf c:\mydir\xp.jar

According to the instructions, it should extract all the files, but it's giving me an error:

java.io.IOException: com: could not create directory....etc.

I also tried extracting one file at a time using this:

c:\jdk1.3.1\bin\jar xf c:\mydir\xp.jar FileName.class

It ran without error messages, but I don't see the class file extracted on any directory (I did an entire search of my local drive--nothing!)

What could be the problem?

[618 byte] By [vincent11867] at [2007-9-26 3:25:03]