You can check on the FreeBSD homepage, http://freebsd.org for additional mirrors where you could connect to for downloding the JRE.

The other error you received looks to be because you installed a JRE for GNU/Linux on your FreeBSD machine. Remember that FreeBSD is not GNU/Linux. If you want to run the GNU/Linux JRE on your machine, then you will need to activate the Linux emulation on the FreeBSD kernel. And install the additional GNU/Linux libraries.