Ahhhhhh! I was messing with Eclipse trying to run C programs and after giving up along the way I screwed up everyone of my Java projects.The error message states 
So, after alot of research and searching around, it looked like I needed to add my classpath and project files back into the build path, which I did 
Please tell me I didn't just ruin everyone of my Java projects. Any help would be so much appreciated, thanks!
 
    