Overview

Packages 
Package Description
com.google.appengine.tools
The com.google.appengine.tools package contains the packages that make up the Google App Engine Tools API, which can be embedded in IDEs and other development utilities to perform testing and deployment of App Engine applications.
com.google.appengine.tools.admin  
com.google.appengine.tools.development  
com.google.appengine.tools.development.gwt
The com.google.appengine.tools.development.gwt package contains the AppEngineLauncher class that provides integration between the App Engine DevAppServer and the Google Web Toolkit hosted mode.
com.google.appengine.tools.enhancer  
com.google.appengine.tools.info  
com.google.appengine.tools.util