Packages

com.google.gwt.core.client	Fundamental classes used in client-side GWT code.
com.google.gwt.core.ext	Classes used to extend the GWT compiler.
com.google.gwt.core.ext.typeinfo	Type-introspection support classes used by generators.
com.google.gwt.http.client	Provides the client-side classes and interfaces for making HTTP requests and processing the associated responses.
com.google.gwt.i18n.client	Internationalization support for GWT applications.
com.google.gwt.json.client	Classes for parsing and creating JSON encoded values.
com.google.gwt.junit.client	Classes and modules used in building JUnit tests.
com.google.gwt.user.client	Fundamental user-interface classes used in client-side GWT code.
com.google.gwt.user.client.rpc	Classes used in client-side implementation of remote procedure calls.
com.google.gwt.user.client.ui	Widgets, Panels, and other user-interface classes.
com.google.gwt.user.server.rpc	Classes used in server-side implementation of remote procedure calls.
com.google.gwt.xml.client	Basic classes used in XML DOM parsing and XML document generation.