java programming

I am trying to understand the following method.Is this methos using inner classes?
" ZeroParameterRoutine " is that class ?


protected boolean handleDomainScopeChange(Object pNewScopeOverride) {          
    boolean wChangingToPrivate = getCustomDfnEditor().isPrivate();    
   
    // set the exclude privatedfns flag.
    getCustomDfnWorkModel().setExcludePrivateDfns(!wChangingToPrivate);
   
    if (wChangingToPrivate) {
      ZeroParameterRoutine wRoutine = new ZeroParameterRoutine() {
        public Object perform() {
          // wait till the corrent user id is in the security pane after domain scope change...
          getCustomDfnWorkModel().setCurrentUserID(getCustomDfnEditor().getCurrentUserIDForCustomDfnQuery());
          return null;
        }
      };
      ViewUtilities.invokeLater(getDomainContext(), wRoutine);
    }
    return true;  
  }