The J2ME Connection Framework

The J2ME Connection Framework
and Related Topics

Prof. David Bernstein
James Madison University

Computer Science Department

bernstdh@jmu.edu

Using the Decorator Pattern

Add Capabilities to an Object Dynamically

Input/Output Streams

The Connection Framework

Packages:
- Mostly in the package javax.microedition.io
- Some connections are in optional packages
States:
- Setup
- Connected
- Closed

The Connection Framework (cont.)

Schemes and Connection Types

Opening a Connection

  SocketConnection c = (SocketConnection)Connector.Open("socket://cs.jmu.edu:8120");

  UDPDatagramConnection c = (IDPDatagramConnection)Connector.Open("datagram://cs.jmu.edu:8120");

  HttpConnection c = (HttpConnection)Connector.Open("http://www.jmu.edu");

  FileConnection c = (FileConnection)Connector.Open("file://test.txt");