Developing scalable series 40 applications: a guide for Java by Michael Juntao Yuan

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By Michael Juntao Yuan

Nokia's sequence forty Developer Platform provides Java builders entry to the world's highest-volume, fastest-growing, and most fun cellular markets. Nokia sells as regards to a hundred million devices inside their Developer Platform households each year, and the sequence forty Developer Platform is the highest-volume platform within the kinfolk. good fortune in this platform is important for the industrial luck of any cellular software. wisdom of the sequence forty Developer Platform should be utilized to the Java setting on all Nokia Developer Platform units, together with sequence 60 units. absolutely reviewed through Nokia's subject material specialists, this e-book covers the full improvement processfrom layout and coding via trying out and deployment. The authors stroll you thru 11 entire instance purposes, featuring downloadable shopper and server resource code that you should use to jump-start nearly any undertaking. alongside the way in which, the authors light up the technical underpinnings of sequence forty, overview an important architectural matters, introduce key cellular layout styles, talk about scalability and equipment optimization suggestions, and supply dozens of top practices and tipsmany of that have by no means ahead of been released.

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The focus of this book is to help the readers understand the J2ME characteristics of Nokia Series 40 devices and then develop applications optimized for those devices. In Chapter 12, "Developing Scalable Applications," we cover how to scale J2ME applications across different devices within and beyond the Nokia Series 40 Developer Platform. The two most important J2ME configurations are as follows. • The Connected Limited Device Configuration (CLDC) is for the smallest wireless devices with 160KB or more memory and slow 16/32-bit processors.

It supports many audio and video playback formats and could allow users to watch TV programs or movies on the device. Series 90 devices feature a major UI upgrade from the Series 60: they support pen-based input methods (see Figure 2-10). Figure 2-10. An example Series 90 Developer Platform device with pen-based user interface. 36 37 Other Nokia Device Series In addition to Developer Platform devices, Nokia makes other devices. These devices are either legacy devices being phased out or devices that do not offer a significant opportunity for third-party developers.

Smart clients support more powerful and flexible security schemes. They enable content-based security and distributed single sign-on. • Smart clients support advanced integration technologies. They are easy to plug into existing corporate infrastructure. Supports for asynchronous messaging and XML Web Services are crucial for reliable and maintainable mobile solutions. Tightly Integrated Smart-Client Technology: Symbian C++ The Symbian OS is a sophisticated 32-bit operating system designed specifically for mobile devices.

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