March 2002
Intermediate to advanced
400 pages
8h 44m
English
Content preview from Wireless J2ME™ Platform ProgrammingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter Summary
This chapter introduced you to the full set of MIDP UI component classes. There are two general categories of UI components: those under the Displayable hierarchy and those under the Item hierarchy.
The Screen class derives directly from Displayable and defines the main abstraction in the MIDP. MIDP applications are fundamentally based on screens.
A Form, a kind of Screen, is the only kind of screen that can aggregate other components. A Form can contain String objects, images defined by the Image class, and objects whose types are subclasses of the Item class.
The typical MIDP application must be able to navigate between screens. Therefore, screens must be able to pass a reference to a valid instance of the screen object that ...
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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.