J2ME in a Nutshell

Name

Package javax.microedition.io

Synopsis

This package contains the interfaces and classes that form the Generic Connection Framework. This framework provides a simpler and more uniform interface for accessing external devices, such as networks and serial communication ports, than the corresponding classes in J2SE.

The key elements of this package are the Connector class and the Connection interface. The Connector class contains static methods that create specialized connections (i.e. objects that implement the Connection interface) to various types of device or network protocol. The Connector open() method accepts a name argument that describes the connection target; it then returns an instance of a class that implements a sub-interface of Connection suitable for the specified protocol or device. Note that the actual classes that are returned are not part of the public API, but the interfaces that they implement (e.g., HttpConnection) are all contained in this package.

The Generic Connection Framework is part of the CLDC specification. Although it defines the framework and most of the interfaces in this package, it does not require the implementation of any specific protocols. The HttpConnection interface is introduced by the MID profile rather than being part of CLDC. MIDP requires only that the HTTP protocol be supported, although device vendors are free to implements sockets, datagrams and other protocols according to the requirements of their devices.

Although intended ...