Client and backend. Every class listed here is shared: the same code is compiled into your app and into your server.

package java.net

Types

class MalformedURLExceptionA string could not be parsed as a URL, or names a protocol nothing handles.
class URIAn implementation of a Univeral Resource Identifier (URI).
class URISyntaxException
class URLDecoderA string out of its application/x-www-form-urlencoded form.
class URLEncoderThe application/x-www-form-urlencoded form of a string.