Bug 13034 Cannot create a Source Folder in a new Java Project
build 20020404 If you try and create a Source Folder in a Java Project you have just created you get an error preventing you from hitting finish. STEPS 1) Create Java Project Foo 2) Open New->Source Folder 3) Enter Bar as the name - you will get "Cannot nest entry Bar inside entry Foo/Bar" 4) Create a folder Bar. 5) Add it as a source folder in the Properties Dialog for Foo. No problem.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/BuildPathsBlock.java
item.setControl(fSourceContainerPage.getControl(folder));
		
		IWorkbench workbench= JavaPlugin.getDefault().getWorkbench();	
		Image projectImage= workbench.getSharedImages().getImage(ISharedImages.IMG_OBJ_PROJECT);
		
		fProjectsPage= new ProjectsWorkbookPage(fClassPathList);		
		item= new TabItem(folder, SWT.NONE);
		item.setText(NewWizardMessages.getString("BuildPathsBlock.tab.projects")); 
		item.setImage(projectImage);
		item.setData(fProjectsPage);
		item.setControl(fProjectsPage.getControl(folder));
		
		fLibrariesPage= new LibrariesWorkbookPage(fWorkspaceRoot, fClassPathList);		
		item= new TabItem(folder, SWT.NONE);
		item.setText(NewWizardMessages.getString("BuildPathsBlock.tab.libraries")); 
		item.setImage(imageRegistry.get(JavaPluginImages.IMG_OBJS_LIBRARY));
		item.setData(fLibrariesPage);
		item.setControl(fLibrariesPage.getControl(folder));
		
		
		Image cpoImage= JavaPluginImages.DESC_TOOL_CLASSPATH_ORDER.createImage();
		composite.addDisposeListener(new ImageDisposer(cpoImage));	
		
		ClasspathOrderingWorkbookPage ordpage= new ClasspathOrderingWorkbookPage(fClassPathList);		
		item= new TabItem(folder, SWT.NONE);
		item.setText(NewWizardMessages.getString("BuildPathsBlock.tab.order")); 
		item.setImage(cpoImage);
		item.setData(ordpage);
		item.setControl(ordpage.getControl(folder));