Windows is derived from UNIX, and has an interface that will not let you see most of what is underneath, without expensive tools or lots of knowledge. Solaris does not have that. Plus it looks like you may have done some kind of non-standard install of java.
Consider this carefully:
Put Solaris on hold for a few months.
Use Windows to run interference for you until you are a lot more comfortable with base UNIX.
Here is what I would do. Download and Install cygwin. You install it as an add on to Windows. I have a copy of UNIX as cygwin on my work desktop computer, it is useful.
Cygwin
Everytime you want a piece of software for cygwin, the download lets the installer put it up for you. Just like Windows. And it is all free. Not like Windows. This way it is harder to shoot yourself in the foot.
After you play with cygwin for a while, consider installing a dual boot of Ubuntu on the same windows box. Ubuntu (a kind of Linux) is meant for transitioning from Windows to UNIX. Solaris is very much not meant for that. The motivation for Ubuntu was to make it really simple for Windows users to avail themselves of the huge opensource software selection. If you are really computer conversant, go straight to Ubuntu if you want.
http://www.ubuntu.com/download/desktop
I manage 4 $100K Solaris M4000 boxes, each with about a dozen virtual computers (zones) in them which is 48 Solaris computers. I've been doing UNIX since the late 1970's and still encounter stuff I do not know. Cygwin/Ubuntu is made to isolate the user from all that.
So change course for a while. If you don't like my idea you will have to do a lot of learning, reading, and fiddling before your frustration level with Solaris goes away.