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Java ME  An  Introduction. www.javameblog.com
 

Java ME An Introduction. www.javameblog.com

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A ppt that I used to explain what Java ME was all about to some guys.

A ppt that I used to explain what Java ME was all about to some guys.

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Java ME  An  Introduction. www.javameblog.com Java ME An Introduction. www.javameblog.com Presentation Transcript

  • Java ME An Introduction
  • www.javameblog.com A presentation by Anoop KS <anoopengineer@gmail.com>
  • What is it?
    • Java 2 Micro Edition.
    • JAVA for MICRO devices.
    • Micro Device:
      • Limited Processing Power
      • Limited Storage Capacity
      • No or Low Bandwidth Network Connection
      • eg: Mobile phones, PDAs, Set top boxes, Car Navigation systems etc.
    What is it?
  • Capabilities Multimedia Image Capture Audio Playback Video Playback Video Recording Audio Recording
  • Capabilities Connectivity HTTP Datagram Secure HTTP Serial IO Bluetooth Infrared Sockets
  • Capabilities Gaming GameCanvas Sprites Layers 3D Support TiledLayer LayerManager
  • Capabilities Personal Information Management File Management SMS MMS GPS Built-in Database SIP Security and Trust Services
  • Architecture MMAPI, 3D API … Optional Packages Profile Configuration JVM MIDP, PBP … CLDC, CDC
  • Configurations
    • Limited virtual machine termed KVM.
    • Geared towards a family of devices.
    • Subset of J2SE API
    • Two Configurations:
      • Connected Device Configuration (CDC)
      • Connected Limited Device Configuration (CLDC)
  • Profiles
    • Geared towards specific use of the device.
    • Extends the configuration.
    • Some profiles:
      • Mobile Information Device Profile (MIDP).
      • Personal Digital Assistant Profile (PDAP).
      • Foundation Profile.
      • Personal Profile.
    • For small devices like:
      • Cell phones
      • PDAs
      • Pagers.
    • Low Power
    • Low Memory
    • Low Bandwidth
    CLDC CDC
    • For less restricted devices like:
      • Set-Top Boxes
      • Car Navigation Systems.
    • Full Featured JVM called CVM.
  • Mobile Phones use MIDP over CLDC
  • CLDC
    • No floating point support.
    • No object finalization.
    • No support for JNI or reflection.
    • No thread groups or daemon thread.
    • No application-defined class loaders.
    • Implementation-defined error handling.
    • Class verification is done differently
  • MIDP
    • MIDP applications are called MIDlets.
    • Contains APIs for:
      • Application management and control.
      • User interface.
      • Persistent Storage.
      • Networking.
      • Timers.
  • MIDlet Life Cycle
  • Why J2ME?
    • Portability.
    • Flexible and consistent user interfaces.
    • Robust security.
    • Built-in network protocols.
    • Networked and offline applications.
    • Larger audience for the application.
    • Reduced application development time.
  • Portability
  • User Interfaces
    • Consistent Look and Feel
    • Flexibility
  • Security
    • Java’s Security Architecture
    • Cryptography Support
    • HTTPS
    • SSL
  • Network Support
    • Wifi
    • GPRS
    • Bluetooth
    • Infrared
    • Any future technology.
  • Development Time Time is Money “ ”
  • Larger Audience
  • Initial Investment
  • Questions?
  • www.javameblog.com A presentation by Anoop KS <anoopengineer@gmail.com>
  • Thank You.