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J2ME



  • J2ME made of profiles, configurations and optional APIs.(Together called a Stack)
  • Configuration
    • memory size and processing power
    • Subset of Java 2
    • JVM
  • Profiles
    • Additional APIs for UI, persistent storage, etc.
  • CLDC
    • 160-512K Total memory
    • Minimum 160K RAM, 32K ROM
  • JVM (KVM)Limitations
    • Native methods cannot be added at runtime.
    • Only has a subset of bytecode verification- The task of verifying classes -split between CLDC device and external mechanism
  • MIDP
    • >= 256K ROM
    • >= 128K RAM for Java runtime heap
    • >= 8K non volatile permanent storage
    • 96*54 pizel screen size
    • Some capacity for keypad, screen i/p
    • 2 way NW connection possibly intermittent.

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