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Java Platform Micro Edition Software Development Kit Version 3.0

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Document Information

Getting Started

Java ME Platform SDK Features

Using Sample Projects

Creating and Editing Projects

Viewing and Editing Project Properties

Running Projects in the Emulator

Searching the WURFL Device Database

Finding Files in the Multiple User Environment

Profiling Applications

Monitoring Network Traffic

Lightweight UI Toolkit

Security and MIDlet Signing

BD-J Support

CLDC Emulation on a Windows Mobile Device

Installing CLDC Emulation on a Windows Mobile Emulator

On-device Debugging

Command Line Reference


JSR Support

JSR 75: PDA Optional Packages

JSR 82: Bluetooth and OBEX Support

JSR 135: Mobile Media API Support

JSR 172: Web Services Support

JSR 177: Smart Card Security (SATSA)

JSR 179: Location API Support

JSRs 184, 226, and 239: Graphics Capabilities

Mobile 3D Graphics (JSR 184)

Choosing a Graphics Mode

Immediate Mode

Retained Mode

Quality Versus Speed

Content for Mobile 3D Graphics

Running Demo3D Samples




Java Bindings for OpenGL ES (JSR 239)

Scalable 2D Vector Graphics (JSR 226)

Running SVGDemo

SVG Browser

Render SVG Image

Play SVG Animation

Create SVG Image from Scratch

Bouncing Balls

Optimized Menu

Picture Decorator

Location Based Service


Running SVGContactList

JSR 205: Wireless Messaging API (WMA) Support

JSR 211: Content Handler API (CHAPI)

JSR 238: Mobile Internationalization API (MIA)

JSR 229: Payment API Support

JSR 256: Mobile Sensor API Support


Retained Mode

Most applications, particularly games, use the retained mode or scene graph API. In this approach, a graphic designer or artist uses 3D modeling software to create a scene graph. The scene graph is saved in the JSR 184 file format. The scene graph file is bundled with the application. At runtime, the application uses the scene graph API to load and display the file.

Applications can manipulate parts of a loaded scene graph to animate characters or create other effects. The basic strategy is to do as much work as possible in the modeling software. At runtime, the application can grab and manipulate parts of the scene graph, which can also include paths for animation or other effects.

For an example of retained mode, see the retainedmode MIDlet in the Demo3D example application.