Scmad Chapter 01

By Marcel Caraciolo http://mobideia.blogspot.com Chapter 01 – Introduction to the Exam SCMAD Certification 45mm 61mm

Agenda
Introduction
Java ME Platform
SCMAD Certification

Introduction
Introduce the Java ME Platform
Introduce the SCMAD Exam

What is Java ME Platform?
Subset of Java Platform
Execution environment
Resource – constrained devices
Mobile Phones
PDA’s
Set-top boxes

Implementations
Specifications are defined by JSR’s
Java Specification Requests
Sun has a Windows/Unix development kit
Device vendors pack VM’s implementation on
devices

Main parties involved
Companies involved
ARM
IBM
LG
Motorola
Nokia
RIM
Samsung
Sony Ericsson

Java Editions

Java ME Platform
Java SE defines a single VM and a single API
At Java ME VM’s are based on “Configurations
and “Profiles”. There are several VM types, to
support devices with different capabilities,
from cheap cellphones to TV setup-boxes with
high-speed network and wired power supply.

Java ME Platform
Configurations define VM’s features (e.g.
floating point support, security model) and
basic API’s (e.g. classes at java.lang, java.util
packages). They are composed by a subset of
features from a regular VM and by some new
API’s.
Profiles address “Horizontal” market segments.
They define specific API’s for device set (e.g.
user interface, application life cycle,
persistence, events, etc.)

CLDC: Connected Limited Configuration
Most limited configuration
Devices: Mobile phones and PDA’s with limited
power and connectivity
Based on a subset of Java SE 1.3 API’s
All other configurations are based on CLDC ( to
avoid market fragmentation)

Simplified security model
JNI is not allowed
No finalization ( Object.finalize())
No file system
No Reflection or Serialization
No Collections Framework
According to the version, floating support may
not be supported
CLDC Restrictions

Closer to the Java SE than CLDC
Devices: Set-top boxes and PDA’s
No need for preverification
Inherit additional API’s from Java SE
CDC: Connected Device Configuration

MIDP (Mobile Information Device Profile)
Designed for mobile phones
Provides GUI, persistence, networking, multimedia
Depends on CLDC
Personal Profile
Designed for PDA’s and Set-top boxes
Provides AWT for other Java SE API’s
Runs on CDC
Available Profiles

Provides:
Application Life-Cycle
User interface
2D games
Multimedia
Persistence
Networking
Notifications
Security
Internet Application distribution with digital signature
MIDP: Mobile Information Device Profile

Defines supplementary API:
WMA (JSR – 120) – Wireless messaging API (SMS messages)
MMAPI (JSR-135) – Mobile Media API (support for audio,
video and media capture)
PIM and File API (JSR-75) – Access to device’s file system
and contact list.
Web Services (JSR-172) - SOAP calls and XML parsing
Java API’s for Bluetooth (JSR-82)
Scalable 2D Vector Graphics for Java ME (SVG Support)
Mobile 3D Graphics API for Java ME (JSR-184)
Mobile Internationalization API (JSR-238)
Optional Packages

Define no new API’s
What it defines?
Requirements over other API’s aiming to reduce platform
fragmentation
Minimum hardware and performance requirements
Examples:
JTWI – Java Technology for the Wireless Industry
MSA - Mobile Service Architecture
“ Umbrella” specifications

Specified API’s:
CLDC 1.0 (1.1 may be used)
MIDP 2.0
WMA 1.1
MMAPI 1.1 (conditional)
Some aspects left as optional by the API’s are
required by JTWI
Define device features requirements (e.g. screen
size, available memory).
JTWI: Java Technology for Wireless Industry

Splits in “MSA Subset” and “MSA”
MSA Subset requires:
CLDC 1.1
MIDP 2.1
MMAPI 1.1
WMA 2.0
PDA API (File and PIM)
Java API’s for Bluetooth (Bluetooth and Obex) (conditional)
Mobile 3D Graphics API
Scalable 2D Vector Graphics API (SVG)
MSA: Mobile Service Architecture

Besides Subset’s API’s, full MSA requires:
J2ME Web Services (Web Services and XML parsing)
Security and Trust Services API (Encryption, smart card access
(conditional), PKI access (conditional))
Location API (conditional)
SIP API (SIP protocol)
Content Handler API
Payment API
Advanced Multimedia Supplements (MMAPI extensions)
Mobile Internationalization (i18n)
MSA: Mobile Service Architecture

SCMAD Certification
CX 310-110 Exam
Sun Certified Mobile Application Developer Exam

Like other Sun certifications, this is a multiple
choice exam taken at Authorized Prometric
Testing Centers
Requirements: SCJP (Any version)
150 minutes, 68 questions, Passing score 55%
Website:
http://www.sun.com/training/certification/java/scmad.xml
SCMAD Certification

SCMAD Certification Objectives
Main Objective: JTWI
ME Platform
JTWI requirements and features
CLDC features and differences (1.0 and 1.1)
MIDP security model
Networking at CLDC and MIDP
Application delivery model
MIDP’s persistence, notification, GUI, game
and sound API’s.
MMAPI 1.1
WMA 1.1

Future Work
Next Chapter:
Tools and requirements for Java ME development
First Java ME mobile Application: Hello World MIDlet
Configurations and Profiles – Differences

References
ALVES F. Eduardo. SCMAD Study Guide,
27/04/2008.
JAKL Andreas, Java Platform, Micro Edition Part
01 slides, 12/2007.
Sun Certification Mobile Application Developer
Website: [http://www.sun.com/training/certification/java/scmad.xml].

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Scmad Chapter 01

by Marcel Caraciolo on Jun 07, 2008

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