Joe Annoni wrote:
Couple of novice questions here (your help is much
appreciated!):
1) While going through the "Working with JavaDB" pdf
in Step 2 of Activity 3 (ie, page 14), I'm getting a
command line error of "'javac' is not recognized as an
internal or external command...". I presume there is
a problem with my JAVA_HOME path, but I've changed it
from the "java/j2re1.4.2_03" directory (which has
worked for everything else) to "java/jdk1.6.0" (where
the 'javac.exe' file exists) and still nothing. Is
there somewhere else where the 'javac' command should
be picked up?
Try running
"${JAVA_HOME}/bin/javac" ("%JAVA_HOME%\bin\javac" on Windows) instead of just
"javac". Alternatively, if you add the path to the bin/ directory of your java
installation to your PATH environment variable, for example:
Bash shell: export PATH=${JAVA_HOME}/bin:${PATH}
Windows cmd.exe: set PATH=%JAVA_HOME%\bin;%PATH%
then "javac" should work. The "Working with..." guide does not show this as far
as I can see, but I don't know if that was a conscious decision or not.
2) Separately, I compiled the WwdEmbedded.java file in
an IDE (JCreator) and when I trying executing it I get
"ClassNotFoundException:
org.apache.derby.jdbc.EmbeddedDriver". I understand
this may be a CLASSPATH problem, however when I check
%classpath% it shows it pointing to the 'derby.jar'
and 'derbytools.jar' files. Any other common problems
or suggestions?
Your analysis is correct, this happens when the driver class (which is in
derby.jar) is not in the classpath. Did you (try to) execute the application in
a command window or via the IDE? I don't have any other suggestions than double
checking that the application is using the classpath you think it is using...
Does running sysinfo ("java org.apache.derby.tools.sysinfo") work?
--
John
