Goals Requirements and Scope of J2ME

• JHighly portable, secure, small app. dev. env.

CLDC goals

• Lowest common denominator platform
• targets all kinds of small connected devices
• Device category independent.
• Generic Connection framework
  

MIDP goals

• Wireless mobile communication devices
• Meaningful high level abstractions
• Mask lower level network transmission protocols(GSM, TDMA. CDMA PDC)
• Build on Generic Framework
  

J2ME goals

• Extensible customizable devices
• Dynamic delivery of apps, content

CLDC Software Requirememts:

• Assumes os/kernel available
• OS provides atleast one schedulable entry.
• No need- separate address spaces/processes

MIDP Software requirements

• Kernel/OS
• Mechanism to R/W non-volatile memory
• R/W access to NW
• Mechanism to provide time-base for timestamping records written to perm. storage
• Ability to write to bit-mapped graphical display
• Mechanism to capture user input

Scope of CLDC

• Java language and VM features
• Core libraries
• I/O
• Networking
• Security
• Internationalization

Does NOT address

• App lifecycle mgmt.
• UI functionality
• Event handling
• High level app model

MIDP Scope

• App Model
• UI
• Persistent Storage
• Networking
• Timer

MIDP 2.0

• Sounds
• 2D games
• MIDLet Signing
• end-end HTTPS security
• App delivery and installation

Also

• System level APIs
• Low level security
• App level cryptography
  

• rich dynamic interactive content from 3rd party developers, content providers
• Secure development of dynamic content