March 2002
Intermediate to advanced
400 pages
8h 44m
English
Content preview from Wireless J2ME™ Platform Programming
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MIDP UI Component Hierarchy
The MIDP inheritance hierarchy diagram in Figure 5.1 reproduces the one you first saw in Figure 3.7 in chapter 3. You've already seen several of the MIDP UI components in this hierarchy, namely Displayable, Screen, Form, and Alert.
Figure 5.1. MIDP UI components belong to either the class of Displayable objects or to the class of Item objects, with the exception of the Ticker class, which derives from Object.
You know that the Displayable class defines the fundamental nature of any component that can be displayed, and that the Screen class defines the fundamental abstraction of the MIDP UI—the screen. The Screen class ...
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