1)
yes

2)
yes you can do one of the followings:
2-1) use latest version of delphi which uses pascal
and C++ and java  as its language (I am not sure it
supports java but I am sure it supports pascal and
C++)

2-2) compile your Delphi Components into ActiveX and
then generate Java bean wrappers for them and use them
in java

but please note all these 2 ways will only generate OS
dependent none pure java codes.

My friend Delphi doesn't support C++ or java  langauge
as its langauge.
Delphi langauge is a kind of Object pascal.(But with
delphi u can create cross-platform application(CLX
Application) , You can use CLX objects to create
applications that will run on Windows or Linux
platforms.)
I suggest u , use JBulider Environment , it is a
Borland product as Delphi and u have implemented
Bussines layer in Delphi u can use CORBA for create a
connection between Java and Delphi.

it is a long time that I don't code in delphi but I
can read this in borland advertisments about delphi
(C++ and Object Pascal)

what is the name of it's author and it's publisher ?
can i find it in front of tehran univ?