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.