I'd like to download an open source project from sourceforge and import it into eclipse. It has a .jar file which i have downloaded and i imported it into eclipse. But when i click on the java files, it says: Source not found, There is no source file attached to the file xyz.class . Also the project has been developed under Netbeans, but Ive been using Eclipse as an IDE and hence I'd like to use Eclipse. Any ideas what I might have done wrong in setting it up?