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Mobile Platforms and J2ME Technology Overview

Explore mobile platforms and J2ME technology in this presentation to understand today's platforms, including configuration, profile, and virtual machine. Discover the motivation and issues, programming benefits, and various supported devices.

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Mobile Platforms and J2ME Technology Overview

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  1. Mobile Platforms and Java 2 Platform Micro Edition Akihiro Minegishi

  2. Objective • The Objective of this presentation is to introduce some mobile platforms and J2ME technology. After this presentation, you will know today’s mobile platforms and what the J2ME platform is.

  3. Agenda • Motivation • Mobile Platforms • J2ME Platform • Configuration • Profile • Virtual Machine

  4. Agenda for Final Presentation • Project • Technology Overview • Motivation • Problems • Programming • ?

  5. Motivation • Motivation • Mobile Platforms • J2ME Platform • Configuration • Profile • Virtual Machine

  6. Motivation There are over Onebillioncellphoneusers worldwide. They would like to use your applications.

  7. Motivation • Wireless Revolution • Growing number of wirelessly connected information appliances • But, how much?

  8. Motivation • The Fact Sheets • Mobile phone makers are expected to sell 670 million handsets todistributors this year, up from around 530 million units in 2003(IDC). • Worldwide PC unit shipments in 2003‘s 154.5 million units. IDC predicted shipments of 170 million units in 2004 (IDC).

  9. Mobile Platforms • Motivation • Mobile Platforms • J2ME Platform • Configuration • Profile • Virtual Machine

  10. Mobile Platforms • OS Independent • JAVA • Sun Microsystems • J2ME : http://java.sun.com/j2me/ • Supported by Nokia, Motorola, Samsung, SonyEricsson and 20+ companies • Supporteddevices : http://jal.sun.com/webapps/device/device

  11. Mobile Platforms • OS Independent • C/C++ • Qualcomm • Brew : http://brew.qualcomm.com/brew/en/ • Supported by • Kyocera Wireless : http://www.kyocera-wireless.com/support/brew-developers.htm • Verizon Wireless : http://getitnow.vzwshop.com/ • AU(KDDI) in Japan : http://www.au.kddi.com/

  12. Mobile Platforms • OS Independent • Flash • Macromedia • Flash Lite • Supported devices : http://www.macromedia.com/mobile/supported_devices/flashlite/

  13. Mobile Platforms • OS Dependent • C++ • Symbian : Seriese60, Seriese90, 9200Seriese, UIQ http://www.symbian.com/phones/index.html • Palm : Treo600 • Windows Mobile : MPx220

  14. J2ME Platform • Motivation • Mobile Platforms • J2ME Platform • Configuration • Profile • Virtual Machine

  15. J2ME Platform • Why J2ME and not other platforms? • Number of devices • Java based • End to end solution

  16. J2ME Platform • Java 2Platforms Servers Desktop High Device Low Device Smartcards J2EE J2SE Personal Profile MIDP Foundation Profile CDC CLDC JAVA Card JVM KVM CardVM Java 2 Micro Edition

  17. J2ME Platform • J2ME consists of • Configuration • Profile • (Optional Package) Over the Virtual Machine

  18. J2ME Platform • J2ME Platform Components MIDP Additional libraries (GUI,Storage) CLDC Smallest common libraries KVM The execution engine

  19. J2ME PlatformVirtual Machine • Motivation • Mobile Platforms • J2ME Platform • Virtual Machine • Configuration • Profile

  20. J2ME PlatformVirtual Machine • What is a KVM? • The KVM (also known as the K Virtual Machine) is a compact, portable Java virtual machine intended for small, resource constrained devices such as cellular phones, pagers, personal organizers, mobile Internet devices, point-of sale terminals, home appliances, or other embedded devices.

  21. J2ME PlatformConfiguration • Motivation • Mobile Platforms • J2ME Platform • Virtual Machine • Configuration • Profile

  22. J2ME PlatformConfiguration • What is a J2ME Configuration? • A configuration defines the minimum Javatechnology that an application developer canexpect on a broad range of implementingdevices (CLDC, CDC) • Configurations are specified via the JavaCommunity Process (JCP) initiative (Sun Microsystems)

  23. J2ME PlatformConfiguration • Connected, Limited DeviceConfiguration (CLDC) • Targeted at devices with: • 160KB to 512KB total memory available for Java technology • Limited power (battery), connectivity (often intermittent),UI (small screen)

  24. J2ME PlatformProfile • Motivation • Mobile Platforms • J2ME Platform • Virtual Machine • Configuration • Profile

  25. J2ME PlatformProfile • What Is a J2ME Profile? • Java technology which supplements aconfiguration to provide capabilities for aspecific vertical market or device type • Defined through Java Community Processinitiative • Subject to compatibility tests (Sun Microsystems)

  26. J2ME PlatformProfile • J2ME Profiles • J2ME Mobile Information Device Profile (MIDP) • Application runtime environment for wirelessdevices based upon CLDC • J2ME Foundation Profile • Base profile for non-GUI networked devices basedupon CDC

  27. Thank you.

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