Sturalke

The easiest way to do this would probably to pass the audio from the Xbox through the PC and from there into the headphones. You can plug it into the line-in/microphone jack on the computer, right click on the sound icon in the task bar tray, click on "Recording Devices", find the line-in device that corresponds to the jack you plugged the Xbox into, right click on that, go to properties, go to the "listen" tab, and enable "Listen To This Device." Be aware that this will create a very very small delay in the audio for your Xbox. It's hardly noticeable, and you get used to it very quickly.
If the delay is too much for you to handle, you will need to invest in a small audio mixer. There's some really cheap ones out there such as the Behringer MicroMix MX400, but typically you may need to get either new cables or an adaptor. This mixer has 1/4" jacks. http://www.amazon.com/Behringer-MX400-BEHRINGER-MICROMIX/dp/B000KGYAYQ

Well, to be honest, doing anything with that optical audio port is difficult. There are some converters like this Insignia Optical/Coaxial to RCA adapter, but I can't guarantee quality on something like this. The Xbox One also doesn't support a USB DAC so that's out of the question. Another good way to do this is to output the audio to your TV with HDMI, and then from there send it to the computer or mixer. The problem is that the Xbox One only supports digital audio out, and we need it in analogue.
 
As far as mixers go, I'm not the one to talk to. I've gotten my rear-end roasted more than once here. You want to be careful about it if you do go looking for stuff though. It tends to get mighty expensive. I do know that if there are mixers that use S/PDIF (optical) inputs, and I didn't see any, they would be quite expensive.
 
I don't know if I read it correctly, so you can ignore this if it doesn't apply. If your headphones have an optical audio jack that makes things harder. Since mixing these inputs with a stand-alone mixer requires that we have the audio in analogue format, we have to get yet another adapter to take it from analogue back to digital. In this case, the audio delay from all that conversion makes it pointless to spend all that money. Also, if your headset is optical based, then you will need to devise another way to connect the microphone back to the console. In this case it may be more cost effective to acquire a new headset with separate 3.5mm plugs for microphone and stereo, and using some clever wiring with one of these guys.

Well, that tells me that I should stop using Browxy.com as a compiler. I was too lazy to try and find something else. I can't install anything on the school computer so I was only looking for in browser IDEs. Surprisingly there aren't very many for Java from what I've seen.
 
I swear though, I've written this same code 4 or 5 times over. I don't know what I changed that now it works. I was judging it mostly with the course's program checker which discretely runs tests and only tells me what percentage of the test cases pass. Before I was only getting 87% or so. I'll try and find an older copy I have saved somewhere and compare them. Thanks for the sanity check though.