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Java ME



Andreas Jakl
Senior Technical Consultant
Forum Nokia

                              13 April, 2010
13.04.2010   © 2010 Nokia   2




Java?
• In numbers:
   – > 6 Billion Java-enabled devices
   – 2.6 Billion Java-enabled ...
13.04.2010        © 2010 Nokia                   3

                                                                      ...
13.04.2010   © 2010 Nokia   4




Java SE vs. Java ME
• Java ME is mainly a subset of J2SE
    – But different UI- and eve...
13.04.2010   © 2010 Nokia   5




Targets




          + RIM / Blackberry
          + SonyEricsson
          + Motorola
13.04.2010   © 2010 Nokia   6




Basic Terms – Configuration
• Defines Java platform for different device classes
    – C...
13.04.2010   © 2010 Nokia   7




Basic Terms – Profile
• Extension and more detailed specification for a configuration
  ...
13.04.2010   © 2010 Nokia      8

                                                 Tornado Mania! 3D


Basic Terms – JSR
 ...
13.04.2010   © 2010 Nokia   9




What JSRs could be required?
• A mapping application could require:
   – JSR 226 (Vector...
13.04.2010   © 2010 Nokia   10




What does my phone support?




                   http://www.forum.nokia.com/devices/
13.04.2010   © 2010 Nokia   11




Development – NetBeans IDE
•   Fully integrated solution
     – Integrates all aspects ...
13.04.2010   © 2010 Nokia   12




Development – Eclipse IDE
•   Mobile Tools for Java (MTJ)
     – Targets Java ME develo...
13.04.2010   © 2010 Nokia   13




SDKs
• Device vendor specific SDKs
   – Simulate target more accurately
   – Support pr...
13.04.2010   © 2010 Nokia   14




Deployment Process


                                           .jar/.jad-file
        ...
13.04.2010   © 2010 Nokia   16




Future of Java ME
• Roadmap
   – Nokia makes its Java ME implementation open source
   ...
Thank You.
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Transcript of "Java me introduction"

  1. 1. Java ME Andreas Jakl Senior Technical Consultant Forum Nokia 13 April, 2010
  2. 2. 13.04.2010 © 2010 Nokia 2 Java? • In numbers: – > 6 Billion Java-enabled devices – 2.6 Billion Java-enabled phones (8 out of 10 shipped in 2008) – 3.5 Billion Java Cards – 20 Million Java set-top boxes – 800 Million Java desktops – 180 Operators deploying Java content – 6 Million developers
  3. 3. 13.04.2010 © 2010 Nokia 3 MSA … Mobile Service Architecture (JSRs 248 and 249) Editions JTWI … Java Technology for the Wireless Industry, JSR 185 MIDP … Mobile Information Device Profile CDC … Connected Device Configuration CLDC … Connected Limited Device Configuration Servers & Servers & High-end Mobile phones & Smart enterprise personal PDAs, TV set-top entry-level PDAs cards computers computers boxes, embedde d devices Optional Packages Optional Packages Optional Packages Personal Profile Optional Packages Java 2 Personal Platform, E Java 2 Basis MSA nterprise Platform, St Profile Edition andard JTWI (J2EE) Edition Foundation MIDP (J2SE) Profile CDC CLDC Java Card Java Platform, Micro Edition (Java ME)
  4. 4. 13.04.2010 © 2010 Nokia 4 Java SE vs. Java ME • Java ME is mainly a subset of J2SE – But different UI- and event handling functionality – Less utility classes (only Vector and Hashtable, no LinkedLists, …) • Code runs on both platforms? – general algorithms: yes – But the whole application needs porting
  5. 5. 13.04.2010 © 2010 Nokia 5 Targets + RIM / Blackberry + SonyEricsson + Motorola
  6. 6. 13.04.2010 © 2010 Nokia 6 Basic Terms – Configuration • Defines Java platform for different device classes – CLDC • Limited UI Currently used in • Low computing power, most phones: CLDC 1.1 • Limited connectivity – CDC • High bandwidth network connection • larger memory requirements
  7. 7. 13.04.2010 © 2010 Nokia 7 Basic Terms – Profile • Extension and more detailed specification for a configuration – Contains APIs for UI, event handling, data storage, networks, timers, … – Minimum requirements for devices (screen size, input possibilities, ...) • For mobile phones: – Mobile Information Device Profile (MIDP) – Currently used: MIDP 2.1
  8. 8. 13.04.2010 © 2010 Nokia 8 Tornado Mania! 3D Basic Terms – JSR (Digital Chocolate) • Java Specification Request (JSR) RealReplay – Describe specifications and technologies (Mopius) – Mobile space: APIs, standards • Examples: – JSR 82: Bluetooth APIs – JSR 179: Location API – JSR 184: Mobile 3D API – JSR 226: Scalable 2D Vector Graphics API
  9. 9. 13.04.2010 © 2010 Nokia 9 What JSRs could be required? • A mapping application could require: – JSR 226 (Vector Graphics) • Map visualization – JSR 179 (Location) • Where am I? – JSR 172 (Web Services) • Requesting data – JSR 75 (File and PIM) Google Maps Mobile © Google • Map an address
  10. 10. 13.04.2010 © 2010 Nokia 10 What does my phone support? http://www.forum.nokia.com/devices/
  11. 11. 13.04.2010 © 2010 Nokia 11 Development – NetBeans IDE • Fully integrated solution – Integrates all aspects of mobile development – Visual UI Designer – Game Builder – Localization, Preprocessing – Web access – Automated deployment – Comes with generic emulator • Maintained by Oracle (Sun) – http://www.netbeans.org/ NetBeans (+ Java ME module)
  12. 12. 13.04.2010 © 2010 Nokia 12 Development – Eclipse IDE • Mobile Tools for Java (MTJ) – Targets Java ME development – Supports MIDlets – Adds project type and Java ME perspective to Eclipse – Templates for common projects (games, etc.) – Localization, Preprocessing – Creates .jad/.jar packages – Originally based on EclipseME plug-in • Pulsar – Combined tools set – includes Eclipse, MTJ and other tools – http://eclipse.org/pulsar/
  13. 13. 13.04.2010 © 2010 Nokia 13 SDKs • Device vendor specific SDKs – Simulate target more accurately – Support proprietary APIs – Include device skins • Generic SDK from Sun – Fine enough for initial development – http://java.sun.com/javame/downloads/sdk30.jsp
  14. 14. 13.04.2010 © 2010 Nokia 14 Deployment Process .jar/.jad-file (MIDlet Suite) Packaging Compile & Preverify Source code (.java)
  15. 15. 13.04.2010 © 2010 Nokia 16 Future of Java ME • Roadmap – Nokia makes its Java ME implementation open source • Contribution to Symbian Foundation – Next version: Java Runtime 2.0 (JRT) • Faster startup • Easier installation • Beta: http://betalabs.nokia.com/apps/nokia-java-runtime-20-for-s60 – Future • Migration to Qt based UI ongoing • Hardware acceleration, haptics, etc. – http://blogs.forum.nokia.com/blog/java-runtime-for-s60-blog
  16. 16. Thank You.
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