PostgreSQL encoding issue

Question

I am running a local postgresql server in version 9.1 and using the postgresql-9.1-901.jdbc4.jar for my java application to access the database.

Though i set the encoding to UTF8 and restarted the server, it is not possible to insert (using the application) values with german umlauts like äöü. The result looks like this: √§√∂√º√ü

I already checked everywhere the encoding and even downgraded the server to version 9.0 with corresponding driver, but nothing helped.

Thanks for helping! mmm...