JV-Lite™2 Wireless Edition is a Java™ Platform for Next-Generation Mobile Phones that is Compliant with MIDP, JTWI, DoJa, and J2ME™ CLDC

JV-Lite2 Wireless Edition guarantees full compatibility with J2ME CLDC (Java2 Platform, Micro Edition, Connected Limited Device Configuration), which is designed for mobile phones. JV-Lite2 class libraries are optimized for embedded systems with limited memory and CPU power, and provide the best balance of performance, footprint size, and portability. JV-Lite2 includes JAM, a Java Application Manager that is fully integrated with ACCESS' NetFront browser. JV-Lite2 Wireless Edition supports all major components, including JTWI 1.0, CLDC 1.0/1.1, MIDP 2.0, WMA 1.1, MMAPI 1.1 and Mobile 3D API. It also supports DoJa (1.5/2.5 and others), the Java profile used in NTT DoCoMo's i-mode service. JV-Lite2 Wireless Edition has shipped throughout the world including deployments in China, the Americas, and Europe as well as international i-mode deployments.

 JV-Lite2 Wireless Edition Brochure (PDF: 874 KB)

---

Functions and Features

• Combines ACCESS' clean room implementation of Java Virtual Machine with class libraries licensed from Sun
• Authorized by Sun through TCK (Java Technology Compatibility kit)
• Compact size optimized for embedded systems
• Class libraries can be saved to ROM
• WAVE (Simplified Window System) makes possible easy porting to any hardware/software platform
• In combination with ACCESS’ NetFront and Compact NetFront Browser, JV-Lite2 can share code with WAVE, HTTP, SSL, etc
• Full-service and licensing available from ACCESS including integration, TCK, and logo acquisition
• Has been ported to the following CPU and OS environments
  

---

J2ME CLDC Compatible Java Platform

ACESS' extensive experience in the embedded software market significantly facilitated the development of JV-Lite2. JV-Lite2’s rapid performance is a result of the native implementation (ANSI C) VM interpreter loop being written in assemble code (ARM 7/9, SH-Mobile).

1. Rapid Start-Up

• Class libraries of JV-Lite2 are stored in ROM as execution files so decompression and loading is not needed
• Reading and writing of resources is fast since the read/write of RMS/Scratch pad are executed in RAM

2. Rapid VM

• Various techniques can be used to improve the speed of JV-Lite2, since it is an ACCESS original VM
• Interpreters (assembler modules) can be provided for target CPUs
• Supports hardware acceleration

3. Rapid Rendering of Graphical Classes

• Graphical classes have been developed using ACCESS technology
• Graphical rendering is written in ANSI C, not Java code
• Minimal requirements for the porting layer

4. Reduction of ROM/RAM

• The module and heap area can be shared with the NetFront browser and other applications such as SSL and HTTP
• 1MB reduction of ROM size is possible when modules such as WAVE, http, SSL, and resource are shared with NetFront
• Java work area can be fully substituted with NetFront's heap area

5. High Portability

• Minimum hardware dependent codes maintain high portability
• Shared use of WAVE with NetFront: When the NetFront browser is already installed, JV-Lite2 will run very quickly because WAVE porting has already been completed. (Two thirds of the API required for porting can be shared.)
  

---

JV Lite2 Wireless Profile implementations

JV Lite2 Wireless Profile has implementations in:

MIDP Implementation
The Mobile Information Device Profile, offering a complete Java runtime environment for wireless terminals.
Read more ...

DoJa
The Java profile used by NTT DoCoMo for their i-mode™ service.
Read more ...