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| | Easily the most troublesome areas you'll encounter while developing in
Java are PATH and (more likely) CLASSPATH problems.
PATH
- Set the PATH environment variable to
include the directory containing the Java SDK tools (the Java SDK's /bin
subdirectory).
CLASSPATH
- Set the CLASSPATH
environment variable to
tell the various Java tools where to look for
user-defined classes.
- The entries should
be directories or ZIP files that contain
the classes.
- On UNIX (colon (:)-separated):
setenv CLASSPATH .:/home/bryan/classes:/usr/local/javatools/classes.zip
- On Windows (semicolon (;)-separated):
set CLASSPATH=.;C:\bryan\classes;D:\local\javatools\classes.zip
- Can specify an explicit class path to any of the Java utilities:
java, javac, javadoc, javah, and javap:
-classpath path
- Setting up CLASSPATH is often critical
to getting things to work at all!
Note that if you use a Java IDE, it often removes most of the
difficulties dealing with PATH and CLASSPATH. That alone is a good reason
to use one!
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