Bug 31683 Show In doesn't work for class file in rt.jar
I20030611 - create Test project that uses Jar container - open NumberFormat.class - activate Show In... and choose Package Explorer Observe: NumberFormat.class doesn't get revealed.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/ClassPathContainer.java
}
	}
	public Object[] getPackageFragmentRoots() {
		return fProject.findPackageFragmentRoots(fClassPathEntry);
	}
	public Object getAdapter(Class adapter) {
		if (adapter == IWorkbenchAdapter.class) 
			return this;
		return null;
	}
	public Object[] getChildren(Object o) {
		return getPackageFragmentRoots();
	}
	public ImageDescriptor getImageDescriptor(Object object) {
		return JavaPluginImages.DESC_OBJS_LIBRARY;
	}
	public String getLabel(Object o) {
		if (fContainer != null)
			return fContainer.getDescription();
		return PackagesMessages.getString("ClassPathContainer.error_label"); 
	}
	public Object getParent(Object o) {
		return fProject;
	}
	
	public IJavaProject getJavaProject() {
		return fProject;
	}
}