Fetching the User Details Based Upon User Page

From themeDisplay we will get the loggedIn User Details ,Suppose we want get the User Details based upon user page.
For example : Profile portlet (user A logged In and need to see the User B profile details in User B profile page)

//ThemeDisplay themeDisplay = (ThemeDisplay)renderRequest.getAttribute( WebKeys.THEME_DISPLAY );

Group group = themeDisplay.getScopeGroup(); 

if (group.isUser()) {  

 User user = UserLocalServiceUtil.getUser(group.getClassPK());

}