March 2002
Intermediate to advanced
400 pages
8h 44m
English
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Screens and Screen Elements
The first example in this chapter shows you the fundamental difference between the two types of MIDP UI components: Displayable components and Item components. The inheritance hierarchy of Figure 5.1 clearly delineates these two categories. The Displayable hierarchy encompasses screens, which you display. The Item hierarchy classifies elements that can be aggregated within a screen. The ensuing examples demonstrate the use of the various MIDP UI components. We explain their use as we introduce each one.
Listing 5.1 shows the file named UIComponentDemo.java, which defines the source code of a new program that demonstrates the use of the MIDP widgets. This file uses code in other files that together comprise the complete ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.