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/SourceContainerWorkbookPage.java
LayoutUtil.doDefaultLayout(composite, new DialogField[] { fFoldersList, fUseFolderOutputs }, true);
		LayoutUtil.setHorizontalGrabbing(fFoldersList.getTreeControl(null));
		
		int buttonBarWidth= converter.convertWidthInCharsToPixels(24);
		fFoldersList.setButtonsMinWidth(buttonBarWidth);
			
		fSWTControl= composite;
		
		
		List elements= fFoldersList.getElements();
		for (int i= 0; i < elements.size(); i++) {
			CPListElement elem= (CPListElement) elements.get(i);
			IPath[] patterns= (IPath[]) elem.getAttribute(CPListElement.EXCLUSION);
			IPath output= (IPath) elem.getAttribute(CPListElement.OUTPUT);
			if (patterns.length > 0 || output != null) {
				fFoldersList.expandElement(elem, 3);
			}
		}
		return composite;
	}
	
	private Shell getShell() {
		if (fSWTControl != null) {
			return fSWTControl.getShell();
		}
		return JavaPlugin.getActiveWorkbenchShell();
	}
	
	
	private class SourceContainerAdapter implements ITreeListAdapter, IDialogFieldListener {