Mobility Tech Tips

Have you ever wanted to log from your MIDlet? You may have considered doing your own logging facility. Why not use an existing solution: The Microlog open-source logging library. It is based on the well known Log4j API or logging library, but has been created from the ground up with Java ME limitations in mind.

On-device debugging isn ' t useful when your MIDlet is running on a client ' s phone. This tech tip presents one approach to developers who want a fast and simple way to debug their apps remotely in real environments.

Bruce Hopkins briefly answers the questions that were submitted in the Comments section of his article Three Reasons Why Your Next Java ME Mobile Application Should Include JavaFX Mobile  

Have you been seeing a newly worded warning message appear when you access JavaFX.com samples or documentation examples on your Mac? This tech tip explains how to turn off the message.

The ? Working with Bluetooth and GPS ? series on the Bluetooth API (JSR-82) spawned a number of questions, which author Bruce Hopkins addresses in this follow-up tech tip.

Here are notes from the presentations I attended at the Java Mobile, Media & Embedded Developer Days (M3DD) today, at the Sun campus in Santa Clara, California.

In this tech tip, Vikram Goyal shows you how to mix and play multiple media content at the same time. He uses the Mobile Media API (MMAPI) and the NetBeans IDE.

Bruce Hopkins serves up Part 2 of his series on Blu-ray Disc Java development. Part 2 extends the code that was used in the Part 1, so that the application can respond to user input. Of course, since a Blu-ray Disc player is a set-top device, you can ' t expect users to interact with it with a keyboard and mouse. So we ' re going to look at the APIs involved in responding to input from a remote control, regardless of whether the user used an infrared remote control or Bluetooth remote control (such as the one used on the Sony Playstation 3, or PS3, gaming console).

The new Java On Device Portal (ODP) lets developers use Java technology to
create and deploy widgets on mobile devices. Register now to join the
Early Access program.

This tech tip by Sun software engineer Thomas Ng describes how to run Java Network Launch Protocol (JNLP) files offline, such as for debugging or testing applets or applications developed with JavaFX.

In this article, the authors describe the process of developing a user-generated localization MIDlet for an application that connects people to community radio stations -- important purveyors of information in technology-challenged Africa.

Bruce Hopkins describes how to use Java ME technology and its Bluetooth API (JSR-82) to access location data from wireless GPS devices, in this second of a two-part series. The JSR-172 (XML Parsing and Web Services) API is used to parse the result.

Java technology is a critical part of the new high-definition video standard, the Blu-ray Disc standard. In this first of a two-part series, Bruce Hopkins covers several aspects of using the Java language to create applications for your Blu-ray disc player, which includes the very popular PlayStation 3 gaming console.

In this code-rich article, mobility technologist C. Enrique Ortiz introduces the lightweight JSON Java ME APIs as an alternative to XML.

During the week of August 18, 2008, we encouraged you to " Ask the Experts " your questions about the recent JavaFX Preview SDK release. Our experts were Joshua Marinacci, Martin Brehovsky, and Lawrence McDonough of the JavaFX engineering team, plus Jeff Dinkins. Here ' s a list of the question-and-answer topics.

JavaFX expert Jim Weaver continues his series of articles with this latest one, TableNode: Creating a Custom Scrollable Table in JavaFX .

The recently released JavaFX Preview helps early adopters become familiar with JavaFX. Got a question about it? Post it during this session and get answers from three key members of Sun ' s JavaFX engineering team.

In August and September 2007, the Sun Developer Network staff started a Learning Curve Journal, a series designed to help users get started with the JavaFX Script programming language. A number of significant advances have been made to the language since then. The Learning Curve Journal has been updated to show you how to use the compiler-based version of the language. Other changes have been made to make the articles current.

In the first of this multi-part series, Bruce Hopkins describes how to construct a low-cost solution that allows you to install, debug, and test your JSR-82 applications on your computer, and how to read data from a Bluetooth-enabled GPS device.

Sun ' s Jennifer Yonemitsu interviews Digisoft.tv CEO John Allen to discuss the Java ME-based client platform for IPTV set-top boxes, using Sun ' s Java technology-based media client and Digisoft.tv ' s middleware/SDK.

NFC is a short-range radio technology that operates on the 13.56 MHz frequency, with data transfers of up to 424 kilobits per second. NFC communication is triggered when two NFC-compatible devices are brought within close proximity, around four centimeters. The Contactless Communication API allows you to discover and exchange data with contactless targets such as NDEF tags, RFID tags, and external smartcards. C. Enrique Ortiz dissects a Contactless Communication API MIDlet.