title: Exception in thread "main" : java.lang.error
body: <p>I've just created a project on Eclipse and imported some source files (existing project). But I can't compile it ! Ok, the project has got several source files, so I wanted to compile only the Main.java file (with eclipse not in the command line, in the command line it worked!) but all what I get is  this error :</p>
  
  <p><a href="http://www.screencast.com/users/Amokrane/folders/Jing/media/82d772dd-10cd-4552-b1d0-3cf18bf39f13" rel="nofollow noreferrer">http://www.screencast.com/users/Amokrane/folders/Jing/media/82d772dd-10cd-4552-b1d0-3cf18bf39f13</a></p>
  
  <p>As you can see the Main.java file is straighforward, just a hello world ! </p>
  
  <p>What's the matter ? </p>
  
  <p>Thanks</p>