Eclipse refuses to recompile Java
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I'm running a webapp through Spring MVC whose backend is written in Java. I am working in Eclipse. I'm trying to make changes to the java code (which I did not write, but am tasked with editing). 

However, none of the changes I make do anything. I tried manually compiling the project in Eclipse (Project -> Build Project) but nothing happened. I even tried taking out one of the .class files to see if it would be recompiled and it was not. The directory which should have contained that file remained empty.

I've already checked and the source and deployment paths match the places in which the .java and .class files I'm working with are located. What the heck is Eclipse doing and how can I make it compile my files?!?