MIDP : Java Glossary

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MIDP
MIDP (Mobile Information Device Profile), like the CLDC (Connected Limited Device Configuration), is a specification document. The MIDP is the API (Application Programming Interface) that sits on top of the core to let you do interesting things on a mobile device (handheld, cellphone), such as the user interface. version 2.0, MIDP-2, adds multimedia and gaming, over-the-air and end-to-end security. MIDP is not compatible with AWT (Advanced Windowing Toolkit) or Swing. It uses the stripped down javax.microedition.lcdui api as its GUI (Graphic User Interface). Personal profile in common on PDAs (Personal Digital Assistants) and PDA/cells. MIDP in common on pure cellphones.

A MIDP application has some jar files each with a MANIFEST.MF, similar to an application manifest and a jad file which lists the midlets and jars for a bundle.

How does Software get into a Cell Phone?

  1. If the phone has Internet access, I presume it is possible to download the jad file (mime text/vnd.sun.j2me.app-descriptor) from an ordinary website given the URL (Uniform Resource Locator).
  2. If the phone has WAP (Wireless Application Protocol) access, you upload the jad file to a host. Your app gets assigned a number. Anyone wanting to load the software uses their cellphone wap browser to navigate to the site and enters the number.
  3. Each phone may have a proprietary way to upload code over a proprietary cable, sometimes called a conduit, with proprietary software from a desktop computer. For example, for Sanyo, the software is a $65.00 USD add on. Nokia uses PC-Suite. Some phones let you upload with Bluetooth. Some phones let you upload over in infrared link. Some phones look like a USB (Universal Serial Bus) storage device (flash drive) to the desktop. Some phones you program by plugging a memory card into them that you have loaded with your memory card writer slot.

Books

book cover recommend book⇒Mobile Information Device Profile for Java 2 Micro Edition (J2ME): Professional Developer’s Guideto book home
by C. Enrique Ortiz, Eric Giguère 978-0-471-03465-0 paperback
publisher Wiley 978-0-471-21718-3 eBook
published 2001-01-15
This books covers the MIDP range of J2ME, coding for handhelds and cellphones.
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Learning More


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