Ehh? I've not heard of that error before. I can't really help you, I didn't know the game engaged with any Java. Sorry I'm not more help, but I really cannot figure what that's about.
if your pc crashes you may have a virus on it. Or too many items processing in the background. Check your task manager to see what is running on your pc. If it’s not the above it could be a faulty fan in the pc causing it to shut down. Depends on your make and model it maybe cheaper to buy a used one from your local pawnshop and you can offer a lower price for the item. I suggest you offer around 80-90% of the price they listed. Hope this helps ;)