title: How do I locate a clashing class in the IntelliJ classpath?
body: <p>I'm trying IntelliJ IDEA after many years as an Eclipse user. At the same time, I'm working on a project that I've inherited with many dependencies.</p>
  
  <p>One class will not compile, because IDEA claims that a method in another class does not exist. I can see the method in its source. Control-clicking on the class name in the IDEA editor takes me to the source that looks OK.</p>
  
  <p>My hypothesis is that the compiler isn't using the class compiled from the source within the project, but a class with the same name, somewhere among my dozens of library jars.</p>
  
  <p>How can I find out where IDEA's compiler is finding the clashing class?</p>