Download Programming Java 2 micro edition on Symbian OS : a by Martin de Jode; Jonathan Allin; et al PDF

By Martin de Jode; Jonathan Allin; et al

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The layer manager keeps an index of all screen objects registered with it and renders them on screen as required when calls are made to its paint() method. 0 as a subset of the larger Mobile Media API (MMAPI), developed under the Java Community Process JSR 135. When the MMAPI was developed it was recognized that smaller constrained devices, such as mobile phones, would not be able to accommodate its full complement. Wisely, it was recognized that not all mobile devices would, for example, have cameras so making this compulsory would be ineffective.

An UnsupportedEncodingException will be thrown if the specified converter is not present. CLDC does not support localization such as time and currency formatting. If necessary, these can be added to an application’s logic. Properties provides support for the limited set of properties available in CLDC. getProperty(String, key). This method returns some limited property information about the device itself, such as the configuration version, platform name, character encoding and supported profiles. It also returns the values of the properties defined by each optional package supported by the device.

There are numerous reasons, many of which are concerned with the device paradigm itself. AWT was designed for desktop applications. The desktop paradigm draws upon inherited usage from other applications: the purpose and use of certain components, and the navigation between them, is understood by the user and, therefore, doesn’t have to be re-learnt. It is also intuitive: more space allows the GUI to have fuller, more explanatory labels and a pointer device provides a convenient way to initiate those commands.

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