Is it possible to call Java Code in a Oracle Trigger?

Hi there,
I am a programmer, but I need to do some Oracle database job. Specifically, I want to create a trigger in Oracle database table and within the trigger to call some java JDBC code to connect to another DB2 database. Is it possible?
If possible where to find some sample code or material?
Thank you!
Eric

Thank you for you great answer. it is clear and helpful.
but I am not very good at database. I still have question on "databaseLink".
all I know is use JDBC to connect to db.
In your code:
INSERT INTO localOracleTable
SELECT * FROM remoteDB2Table@databaseLink
BEGIN
FOR x IN (SELECT * FROM localOracleTable)
LOOP
INSERT INTO remoteDB2Table( <<column list>> )
VALUES( x.col1, x.col2, x.col3, ... x.colN );END LOOP;
END;
What the "databaseLink" look like? I want to do is other way around. select * from remoteDB2Table and insert into localOracleTable...
I will spend some time on Oracle to try to fully understand it.
Thanks a lot!
Eric

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===============================
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