import org.eclipse.jdt.ui.wizards.IClasspathContainerPageExtension; //导入依赖的package包/类
private IClasspathContainerPage getContainerPage(ClasspathContainerDescriptor pageDesc) {
	IClasspathContainerPage containerPage= null;
	if (pageDesc != null) {
		IClasspathContainerPage page= pageDesc.getPage();
		if (page != null) {
			return page; // if page is already created, avoid double initialization
		}
		try {
			containerPage= pageDesc.createPage();
		} catch (CoreException e) {
			handlePageCreationFailed(e);
		}
	}

	if (containerPage == null)	{
		containerPage= new ClasspathContainerDefaultPage();
		if (pageDesc != null) {
			pageDesc.setPage(containerPage); // avoid creation next time
		}
	}

	if (containerPage instanceof IClasspathContainerPageExtension) {
		((IClasspathContainerPageExtension) containerPage).initialize(fCurrProject, fCurrClasspath);
	}

	containerPage.setSelection(fEntryToEdit);
	containerPage.setWizard(this);
	return containerPage;
}