Bug 28510 java build path inconsistency [build path]
20021216 select rt.jar in the package explorer open properties it allows you to set the javadoc location but for source attachment you are sent somewhere else it's inconsistent - on the java build path they both look sort of the same (they sit under the same node in the tree)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/LibrariesWorkbookPage.java
res.add(resource);
					}
				}
			} catch (JavaModelException e) {
				
				JavaPlugin.log(e.getStatus());
			}
		}	
			
		List cplist= fLibrariesList.getElements();
		for (int i= 0; i < cplist.size(); i++) {
			CPListElement elem= (CPListElement)cplist.get(i);
			if (elem.getEntryKind() == IClasspathEntry.CPE_LIBRARY && (elem != existing)) {
				IResource resource= elem.getResource();
				if (resource instanceof IContainer && !resource.equals(existing)) {
					res.add(resource);
				}
			}
		}
		return (IContainer[]) res.toArray(new IContainer[res.size()]);
	}
	
	private IFile[] getUsedJARFiles(CPListElement existing) {
		List res= new ArrayList();
		List cplist= fLibrariesList.getElements();
		for (int i= 0; i < cplist.size(); i++) {
			CPListElement elem= (CPListElement)cplist.get(i);
			if (elem.getEntryKind() == IClasspathEntry.CPE_LIBRARY && (elem != existing)) {
				IResource resource= elem.getResource();
				if (resource instanceof IFile) {