If you want the full transcipt then send me email: solidus.asadov@gmail.com In 90s we needed an environment which is adapted for constrained devices – devices that had limitations on what they can do when compared to standard desktop or server computers. The constrained devices had such limitations as extremely limited memory, small screen sizes, alternative input methods, slow processors etc. In 1999 Sun Microsystems Company has decided to develop a special edition of Java called Java 2 Micro Edition.

1. Presented by Rauf Asadov

2. Contents
 Introduction
 History
 Basics
 MIDlets & Life Cycle
 Demonstration...

3. Introduction
Java2
Standard Edition
(J2SE™)
Java2
Enterprise Edition
(J2EE™)
Java2
Micro Edition
(J2ME™)
Java 2 Platforms
Standard desktop &
workstation applications
Heavy duty server
systems
Small & memory
constrained devices

4. History
 1990 Subdivision of Java into Java EE, Java SE, Java ME
 2000-2001 First Java ME supported phones (MIDP 1.0)
 2002 MIDP 2.0
 2004 Java ME supported phones revolution
 2009 MIDP 3.0
 2014 Java ME 8

5. Basics
J2ME is based on 3 core concepts:
 Configurations
 Profiles
 Optional packages

6. Configuration
- is a complete Java runtime
environment:
 Java virtual machine (JVM) to
execute Java
 Set of core Java runtime libraries
 Interface to the underlying system
J2ME
Libraries
Java Language
Java Virtual
Machine
Configuration

7. Configuration
CLDC CDC
Connected Limited
Device Configuration
Connected Device
Configuration

8.  CLDC (Connected Limited Device
Configuration) is used for low-end
consumer devices - cell phones, two-way
pagers, personal digital assistants (PDAs),
organizers, home appliances, and point of
sale terminals.

9. Connected Limited Device Configuration
 For very constrained devices, small screens
 160 - 512 KB of total memory
 16-bit or 32-bit processor
 Low power consumption and often operating with battery
power
 Connectivity with limited bandwidth
 May not have a user interface
 Use limited Virtual Machine ( called KVM)
 Selected classes are from: java.lang, java.io, java.util

10.  CDC (Connected Device Configuration) is
used for high-end consumer devices (TV
set-top boxes, Internet TV)

11. Connected Device Configuration
 2 MB or more memory for Java platform
 32-bit processor
 High bandwidth network connection, most often using
TCP/IP
 17 packages
 Full-featured Java2 virtual machine (called CVM)

12. Profile
- Adds features that are specific to a certain device
category such as cell phones or PDAs
- Based on specific configuration
Profile
MIDP PDAP PPPBPFP
Mobile
Information
Device
Profile
Personal
Digital
Assistant
Profile
Foundation
Profile
Personal
Basis
Profile
Personal
Profile

13. MIDP
 MIDP is targeted at a class of devices known
as mobile information devices (MIDs).
The MIDP, specifies the following APIs:
 application (MIDP application semantics and control)
 user interface
 persistent storage
 networking
 Timers

14. Optional Packages
- Implies additional functionality:
 Bluetooth
 Messaging
 Media
 3D

15. MIDlets
 MIDP applications are called MIDlets.
 javax.microedition.midlet.MIDlet
Life Cycle

16. MIDlet Suite
 MIDlets are bundled into a MIDletsuit
contained within a single package.
JAR JAD