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Jar question

Jar question# Java - 爪哇娇娃

b*e2003-02-07 08:02

1 楼

I have put several java classes in a Jar file, one class
is the main entry, so I also put the main class information
in the manifest file.
However, when my class call j2ee classes (say java mail class),
"java -jar xyz.jar" always report can't file class error,
even i put -classpath c:\j2eeinstalpath\lib\j2ee.jar in the command.
There is no problem if i don't use jar file at all.
I wonder if this is the limitation of Jar? Thanks.

g*g2003-02-07 08:02

2 楼

Did you put . there with your cp?

【在 b*e 的大作中提到】

: I have put several java classes in a Jar file, one class
: is the main entry, so I also put the main class information
: in the manifest file.
: However, when my class call j2ee classes (say java mail class),
: "java -jar xyz.jar" always report can't file class error,
: even i put -classpath c:\j2eeinstalpath\lib\j2ee.jar in the command.
: There is no problem if i don't use jar file at all.
: I wonder if this is the limitation of Jar? Thanks.

b*e2003-02-07 08:02

3 楼

i did set all the classpath including '.'.
And i ran the unjarred program without any problem.

【在 g*****g 的大作中提到】

: Did you put . there with your cp?

g*g2003-02-07 08:02

4 楼

Well, maybe you put the exception here, which class is not found?

【在 b*e 的大作中提到】

: i did set all the classpath including '.'.
: And i ran the unjarred program without any problem.

b*e2003-02-07 08:02

5 楼

say if my main class name is SendEmail.java, there are
also other small clases. This SendEmail.java imports
javax.mail which is a part of j2ee.
if I don't jar all the classes. I use
% java SendEmail
at the command line, everything works smoothly.
However, if I jar everything in one SendEmail.jar, when I use
% java -jar SendEmail.jar
or
% java -classpath (path of j2ee) -jar SendEmail.jar
it will report run-time error, such as javax.mail.Address not found.

【在 g*****g 的大作中提到】

: Well, maybe you put the exception here, which class is not found?

b*e2003-02-07 08:02

6 楼

OK. After searching google, i've found the answer.