Sony Ericsson T630, T628 Java, Optional download features, Supported protocols, Selection keys

White Paper T630/T628

Java

J2ME

CLDC

Sandbox

MIDP Application

running on

MIDP/CLDC/kVM

User Interface

JAR file	Persistent
resource	Storage

HTTP/	Internet
	Services and pages
Datagram	with response in
	HTML format

Other networked devices (datagram communication)

The T630/T628 supports J2ME CLDC/MIDP. It is ready to run applications written for handheld com- puters and mobile phones.

Applications are easily downloaded directly to the T630/T628 using the browser, or may be installed from a connected PC. Applications such as the currency converter can obtain the latest exchange rates from the Mobile Internet and then make up- to-date calculations. It is also possible to access and download data from a company server.

T630/T628 supports JSR-135 allowing control of the synthesizer for MIDI, I-melody and Tone sequence playback.

Optional download features

The browser can download JAR/JAD files from WAP and HTML pages provided that the server supports the actual file types. T630/T628 can also download JAD/JAR files from ordinary WAP serv- ers provided that they support the mime type for each of the file types.

Supported protocols

The T630/T628 supports “Sun OTA recommended practice for J2ME CLDC/MIDP” and ordinary MIDP 1.0 applications without extension API’s.

Sandbox security concept

J2ME/CLDC uses a sandbox security concept which includes a number of system components working together to ensure that untrusted applica- tions cannot gain access to system resource.

Selection keys

When executing a MIDP application a lower portion of the screen is reserved for displaying selection keys associated with the application. The appear- ance of this soft key area at runtime depends on which base class the displayed application is derived from.The left soft key is for the first com- mand in the command list and the right soft key is for the “More” list and “Help”.

18 October 2003