Java application in Oracle

I'm writing an Java application which is triggered by a table update. The application need call some classes which are packaged in a .jar file. Now, I use Java stored procedure to create the trigger but how can I import the .jar file?? I try to use loadjava but some errors are prompted. I would like to know whether it is possible to use database trigger to initiate a java application (with many classes) and the method to implement such application.
Thx in advance.

Hi Avi,
Thanks for your reply. Here is the error message when I load the .jar into Oracle.
C:\TEMP>loadjava -u scott/tiger@ORCL C:\Temp\javaOracle.jar
Error while creating acbbinding/oracl/SCOTT/Tables/EMPPackage/Record
ORA-29533: attempt to overwrite class or resource acbbinding/oracl/SCOTT/Tables/EMPPackage/Record while defining or compiling SCOTT.acbbinding/oracl/SCOTT/Tables/EMPPackage/Record
Error while creating acbbinding/oracl/SCOTT/Tables/EMP
ORA-29533: attempt to overwrite class or resource acbbinding/oracl/SCOTT/Tables/EMP while defining or compiling SCOTT.acbbinding/oracl/SCOTT/Tables/EMP
Error while creating acbbinding/ODBCException
ORA-29533: attempt to overwrite class or resource acbbinding/ODBCException while defining or compiling SCOTT.acbbinding/ODBCException
Error while creating class acbbinding/ODBCException1
ORA-29537: class or resource cannot be created or dropped directly
loadjava: 4 errors
There are similar errors in loading other .jar files. Could you tell me what's the problem?
I also can write the Java Stored Procedure and trigger it successfully. The problem is whether I can pass some information , say the updated record which initiate the trigger, to other class in the .jar files.
Thanks for you kindly help again.

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