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error finding package when compiling

 
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I�m getting an error because my compiler can�t find J2EE on my machine. I�ve installed the J2EE API (at least I think I have) and I�ve checked my variables �CLASSPATH� and �PATH� to make sure that they are pointed to the right directories.

Here�s all the pertinent info:

I keep getting a compilation error when trying to import J2EE classes. For example:

will cause the compiler to give me a �package javax.servlet.http does not exist� error.

I am using Windows XP, a text editor, and the command line to compile my code. I did have IBM�s WebSphere Application Developer (WSAD)IDE running on this computer at one point, but that is uninstalled now. I also have a DB2 client app running on the computer (it�s noted in the CLASSPATH string below).

CLASSPATH string (I separated each part of the string into a new line for readability):

PATH string:


This shouldn�t be too hard, but apparently it is. Does anyone have any idea why?
 
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Where is the jar that contains the javax.servlet.http.* classes? in the sun/AppServer directories? You need to find which jar file contains them and include that jar file (not just the directory where its located) in your classpath.
 
Chris Staten
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OK, I have a fundamental misunderstanding of the environmental variables on a computer with regards to java packages. After reading Tom�s post I used the following command to successfully compile my code:


I then updated my PATH and CLASSPATH variables to include the following:


Then I unsuccessfully tried to use the following command to compile my code:


There are two questions that I have about this:
  • Do I always have to give the full path to a jar file that I want to use as opposed to just giving the path to that directory?
  • Why will my code compile when I use the �classpath argument, but not when I rely on the CLASSPATH variable (therefore leaving off the �classpath argument when compiling)?


  • -Thanks

    EDIT:
    Is there any difference with regards to Microsoft Windows versus Linux/UNIX on any of this?
    [ March 07, 2005: Message edited by: Chris Staten ]
     
    Tom Katz
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    Do I always have to give the full path to a jar file that I want to use as opposed to just giving the path to that directory?


    Not sure about this, but I think so... If you have a classes directory (not jarred up) then the directory is sufficient.

    Why will my code compile when I use the �classpath argument, but not when I rely on the CLASSPATH variable (therefore leaving off the �classpath argument when compiling)?



    Did you open a new dos prompt after changing the CLASSPATH to include the .jar file? A command window won't pick up changes in the environment variables so you need to open a new one.
    [ March 07, 2005: Message edited by: Tom Katz ]
     
    Chris Staten
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    Thanks Tom, it WAS because I hadn�t opened a new dos prompt. I ended up having to tweak one more thing to be able to leave off the �classpath argument. I had to append �classes/� to my CLASSPATH environmental variable. This was because I am using custom classes in my program which are under the classes/<path>/<to>/<java classes> directory. This means that the new portion of my CLASSPATH variable looks like this:



    This also seems to validate your statement that �If you have a classes directory (not jarred up) then the directory is sufficient.�

    Now I just need to figure out how to include my Oracle JDBC driver classes


    You�ve been a big help Tom, thanks.
     
    Tom Katz
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    NO problem, glad to help...

    Here's the two I had to append to my CLASSPATH (tho, its been awhile, so I dont know if you'll have to do more) for oracle JDBC drivers:

    -classes12.jar;
    -nlscharset12.jar
     
    Chris Staten
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    After a bit of work I got the entire thing figured out and working. If anyone is trying to connect to a remote Oracle database using JSP/SERVLET technology in conjunction with Tomcat then you may find this helpful.

    But the answer to including my Oracle JDBC drivers was to put them in my web application�s lib directory.
    [ March 08, 2005: Message edited by: Chris Staten ]
     
    With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
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