Slide 5.2: Network connection (cont.)

Slide 5.1: Network connection
Slide 5.3: Network connection (cont.)
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Network Connection (Cont.)

The Connection interface is the most basic connection type. It can only be opened and closed.

The InputConnection interface represents a device from which data can be read. Its openInputStream method returns an input stream for the connection.

The OuputConnection interface represents a device to which data can be written. Its openOutputStream method returns an output stream for the connection.

The StreamConnection interface combines the input and output connections.

The ContentConnection is a subinterface of StreamConnection. It provides access to some of the basic meta data information provided by HTTP connections.

The StreamConnectionNotified waits for a connection to be established. It returns a StreamConnection on which a communication link has ben established.

The DatagramConnection represents a datagram endpoint.

The open method of the Connector class has the following syntax, where the String parameter has the format "protocol:address;parameters".

   Connector.open(String);

Below are few examples:

HTTP connection: Connector.open("http://java.sun.com/developer");

Datagram connection: Connector.open("datagram://address:port#");

Communicate with a port: Connector.open("comm:0;baudrate=9600');

Open files: Connector.open("file:/myFile.txt");