requirementslol

So I've played using the TechnicLauner on my desktop, and I've never gotten this problem. When I run the launcher, it opens up the "Checking Launcher Version..." thing and then a dialogue box appears that says "Can't find java directory." and the updater thing that I mentioned earlier stays at 0%. What am I supposed to do? I downloaded java, then redownloaded it. I haven't tried to redownload the TechnicLauncher though... Should I try that? Any suggestions?