Wireless Java developing with J2ME by Jonathan Knudsen

By Jonathan Knudsen

This version is up-to-date to incorporate insurance of the subsequent model of courses for cellular Java units. MIDP 2.0 comprises many fascinating new beneficial properties, equivalent to sound HTTPS help, plenty of consumer interface API improvements, a video game API, and masses extra.

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By leveraging IoC, the framework manages which application-specific methods are called in response to user events. ■Note IoC means you have registered some part of your code with the framework, and the framework will call this code when the client requests it. This is also referred to as the Hollywood principle. (“Don’t call us. ”) In the previous retail software scenario (refer to Figure 1-1), frameworks can help increase developer productivity and ease of maintenance, but the frameworks are also incompatible with each other, which makes integration hard to handle.

Qxd 16 1/3/06 4:47 PM Page 16 CHAPTER 1 ■ THE FOUNDATION OF JSF: COMPONENTS Table 1-3. 1 ** This component has no associated renderer. For each combination of UIComponent and Renderer, there is a renderer-specific subclass, or convenience class. A standard JSF implementation, such as the Sun RI or the MyFaces runtime, comes with a set of HTML renderers (provided through the standard HTML RenderKit) and a set of HTML renderer-specific subclasses, such as HtmlSelectOneRadio. Renderer-Specific Component Subclass In most cases, this subclass creates an instance of the component at runtime.

ViewState so that alternative postback mechanisms, such as Ajax, can more easily be integrated with the JSF lifecycle. One of the drawbacks of saving state in the user session on the server is memory consumption. If scalability is an issue for application developers, the client-side implementation will prevent memory consumption from shooting through the roof and will have an advantage in clustered environments. But, since state will now have to be sent back and forth between the client and the server, response time might increase.

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