Sagem MYMOBILETV User Manual page 61

252829103_myMobileTV v.2_en.book Page 61 Mardi, 22. janvier 2008 9:56 09
What is a MIDlet?
A Java™ application or a game designed to run in a mobile phone is named a MIDlet (MIDP applet).
A MIDlet is usually made of 2 files:
- The JAD file
- The JAR file
JAD file stands for Java™ Application Descriptor. It is a small file describing the content of a JAR file.
JAR file stands for Java™ Archive. It refers to the application data themselves (program, images, sound). A JAR file may be
up to 200 kilo-bytes large.
Note: In rare circumstances, MIDlet vendors may provide no JAD file and the MIDlet is the JAR file alone. In such a case it
is your only responsibility to evaluate the risk to download the JAR file without possibility of consulting the JAD file.
Downloading a MIDlet (Java™ game or application)
MIDlets are easily downloaded in the mobile phone through the Games or Applications menus or through the WAP browser.
In almost all cases, you will first receive a JAD file which will be displayed on the screen.
When you select a JAD file, your mobile phone downloads it, displays data contained and prompts you to acknowledge the
JAR file download.
The popup displays information below:
- Name of the MIDlet, Version, Size, Name, Security status, URL.
If you do not want to download the main data (JAR file), you shall refuse to acknowledge further airtime consumption by
selecting "Cancel".
If you agree on the MIDlet installation, just select OK. The MIDlet is installed with security levels set to default values
associated with its security status.
Before downloading an application, such a message may appear: "Your handset cannot identify the application, please be
sure of the source of the application before installing the application".
Trademarks
Java™ and all other Java-based marks are trademarks or registered trademarks of Sun Microsystems, Inc. in the U.S. and
other countries.
Java™
61