Java under UNIx
Hi
I have some problem executing class file under UNIX.
I have a directory under UNIX,
/home/user1
wherein I have placed a class file say "JavaProg.class"
I execute "java JavaProg" from the above directory
and it generates the desired output.
Now, I have another directory,
/home/user2
wherein I again I have placed the same class file "JavaProg.class"
I execute "java JavaProg" from this second directory
this time and it again generates the desired output.
Problem starts now,
I delete the class file from /home/user2
1. And then I execute the following command trying to
directly execute class file which is available from user1's directory (since user2 class file is deleted)
"java /home/user1/JavaProg" from "/home/user2"
directory. (since I am executing user1's class file
from user2 directory)
On this it says "Can't find the class file".
So I try various other options like.
2. First I set the CLASSPATH as
set $CLASSPATH=.:/home/user1:/opt/java/lib:$CLASSPATH
export CLASSPATH
And I try the following command
"java JavaProg" (This time I dont' write the complete
absolute path since its already defined in the CLASSPATH) I get an error. So I still try the following,
3.
"java /home/user1/JavaProg"
ERROR
4. "java -classpath .:home/user1 JavaProg
ERROr
5. "java -classpath .:home/user1 home/user1/JavaProg
ERROr
6. "java -cp .:home/user1 JavaProg
ERROr
7. "java -cp .:home/user1 home/user1/JavaProg
ERROr
What might be the source of the error. Can anyone
help. Thanks in advance for the help.
Thank,s
JAtin
[1860 byte] By [
Jatin2000] at [2007-9-26 2:22:13]
> Hi
>
> I have some problem executing class file under UNIX.
>
>
> I have a directory under UNIX,
>
> /home/user1
>
> wherein I have placed a class file say
> "JavaProg.class"
>
> I execute "java JavaProg" from the above directory
> and it generates the desired output.
>
>
>
> Now, I have another directory,
>
> /home/user2
>
> wherein I again I have placed the same class file
> "JavaProg.class"
>
> I execute "java JavaProg" from this second directory
> this time and it again generates the desired output.
>
>
> Problem starts now,
>
> I delete the class file from /home/user2
>
> 1. And then I execute the following command trying to
>
> directly execute class file which is available from
> user1's directory (since user2 class file is deleted)
>
> "java /home/user1/JavaProg" from "/home/user2"
> directory. (since I am executing user1's class file
> from user2 directory)
>
> On this it says "Can't find the class file".
You should realize that the java command doesn't take a class file as an argument, it takes a class name. Since there is no class named /home/user1/JavaProg, you get an error.
>
>
>
> So I try various other options like.
>
> 2. First I set the CLASSPATH as
> set $CLASSPATH=.:/home/user1:/opt/java/lib:$CLASSPATH
> export CLASSPATH
I believe that should be:
set CLASSPATH=.:/home/user1:/opt/java/lib:$CLASSPATH
>
> And I try the following command
>
> "java JavaProg" (This time I dont' write the complete
>
> absolute path since its already defined in the
> CLASSPATH) I get an error.
> So I still try the following,
>
>
>
> 3.
>
> "java /home/user1/JavaProg"
>
> ERROR
That won't work for the same reason I stated earlier. The 'java' command expects a class name, not a class file as an argument.
>
>
> 4. "java -classpath .:home/user1 JavaProg
>
> ERROr
>
>
> 5. "java -classpath .:home/user1 home/user1/JavaProg
>
> ERROr
>
>
> 6. "java -cp .:home/user1 JavaProg
>
> ERROr
None of these will work because you've forgotten the leading '/' before 'home'.
>
>
> 7. "java -cp .:home/user1 home/user1/JavaProg
>
> ERROr
>
>
> What might be the source of the error. Can anyone
> help. Thanks in advance for the help.
How about trying:
java -cp /home/user1 JavaProg
Jim S.
