By Eric Gigu?re
ISBN-10: 0471437573
ISBN-13: 9780471437574
An in-depth educational on find out how to use Java 2 Micro version to application hand held devices
even though Java is among the hottest programming languages, it really is too robust for use on instant, hand-held units just like the Palm attached Organizer. A miniature model of Java, known as Java 2 Micro version, has now been created by means of solar Microsystems to run in particular on those units. Written by way of software program developer Eric Giguere, this publication offers an authoritative therapy of this new language. Readers will research what should be performed to make Java attainable on those units and what recommendations are required to put in writing courses that do not take in an excessive amount of reminiscence or run down the device's batteries. The publication additionally offers entire assurance of Java Micro variation, together with the profiles that outline the services on hand to numerous devices.
CD-ROM comprises authorized models of the Java 2 Micro variation SDK, Waba, and Kaffe. Examples are only if run on a number of instant systems.
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Additional info for Java 2 micro edition : professional developer's guide
Sample text
A JavaBean component (usually referred to simply as a bean) is a self-describing Java class that exposes attributes such as properties (with accessor methods), operations as methods, and notifications as events. Beans are meant to be plugged into a development environment such as PowerJ, JBuilder, or Visual Café, which then asks the bean for a description of its features (through a process called introspection) and enables the user to manipulate the bean visually through development aids such as property lists.
For example, strings are stored in UTF-8 format, which is a multi-byte encoding of Unicode, while individual data values that are larger than a single byte are always stored in big-endian (high bytes first) format. Class files are not compact because they store a lot of symbolic information: the name of the class, the names (including the parameter and return types) of methods, field names, the names of other classes and methods referenced by the class, and so on. Some of this information is optional and can be stripped out (debugging information, for example).
Even if the communication method supports higher speeds, the device itself will always be a limiting factor because it can only process so much information at a time with its slower CPU. Throughput limitations aside, there can also be cost limitations associated with network communication. This situation is particularly true with wireless communications that use public data networks, such as Mobitex or ARDIS, where charges are based in part on the amount of data sent. There is also the cost of including the networking hardware itself in the device and keeping power consumption at acceptable levels.
Java 2 micro edition : professional developer's guide by Eric Gigu?re
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