I just completed my database hospital application and now i'm ready to export it into a JAR file. I palced the DB in the classes subfolder and played with ClassLoader but got nothing!
I used the following code

String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
    String url="jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=f:hospitalDb.mdb;}";

any idea how to make a JAR file for a database application?

i would be grateful

P.S:i'm using MS Access

I don't know if the DB program knows how to read a DB that is inside of a jar file.

may be i wasn't clear. i want to convert the jar into an .exe application so i can install any where.
so what i want exactly is to access my DB from any path<and how could i read that path?

convert the jar into an .exe application so i can install any where

Do .exe files run on linux and macs?

well, yes, but turning it into an .exe will prevent you from running it 'anywhere', not make it possible to do so. a .jar is a platform independent executable, so just keep that.
also: why putting the db in the .jar?

Put the DB file in a standard location on all PCs that use your code.
The user.dir folder for example.

i wanted to access it from any path accorrding to where the user installs the application but i give up.
i will put the DB is a standard location as you said