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BlackBerry Concepts

No change in size, 00:47, 22 February 2011
Configuring the Project
Base class for all device applications that provide a user interface.
* A UI application maintains a stack of Screen objects. As it pushes screens onto the stack, it draws them on top of any other screens already on the stack. When the application pops a screen off the stack, it redraws the underlying screens as necessary. Only the screen on the top of the stack receives input events.
* Each screen may appear only once in the display stack. The application throws a runtime exception if you attempt to push a single screen onto the stack more than once.
Note that a UI application must follow rules similar to those of traditional Swing applications.
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