why on earth would you use odbc at all in this, just use jdbc directly
forget about the registering of odbc sources and substitute these two
lines in the example

Class.forName("oracle.jdbc.OracleDriver");
conn=DriverManager.getConnection("jdbc:oracle:thin:@//[server]:1521/[database]",\
"scott","tiger");

where [server] is your oracle  server
and [database] is your database  instance/schema

this will work on any OS