Java Mobile Programming: J2ME Using RecordStore (RMS)

Posted on August 12, 2010 under Programming. This post currently has 0 comment(s).

Here’s a quick code demo on how to use J2ME’s RecordStore feature under the record management store (RMS). With RMS, you can add, delete, and update/edit data via the MIDlet interface. This sample code was created during my 3rd year CS elective class (CS Elect 1 – Mobile Application Development) in ADZU. It is a simple phone address book with the following functions:

Adding of new entries to your phonebook
Updating / Editing of entries in your phonebook
Deleting of entries from your phonebook
Sending querries to your phonebook (sorting and filtering)

Click here to download the source code.

Java Mobile Programming (J2ME): Menu, List and Alert

Posted on March 17, 2010 under Uncategorized. This post currently has 0 comment(s).

Here’s a short sample application implementing List, Menu, and Alert items using J2ME Mobile Application programming. I use Netbeans with Java Wireless Toolkit (comes with mobile phone emulators) in developing J2ME-based applications. And if you want to install this on your Java-enabled phones, you can do so by copying the JAR file to your phone and run it.

Below is the screenshot and the source code:

Click here to download/view source code for this demo.

Connecting Java Applications to MySQL Database

Posted on March 13, 2010 under Applications, Programming. This post currently has 0 comment(s).

So you’re creating a Java application and want it to work and get connected to a MySQL database. Here’s a quick tutorial on how to get your Java App working with MySQL database.

First, you need to identify your MySQL connection properties like your host address, username, password and database name (assuming that you have your MySQL already up and running.) Also, make sure that you have your Java MySQL Connector installed in your Java JDK library path. You can download Java MySQL Connector here, if you do not have one.

Now, having those information, you need to initiate a new instance of the Java MySQL Connector using these lines:

Class.forName(“com.mysql.jdbc.Driver”).newInstance();
conn = DriverManager.getConnection (ConnectionURL, dbUsername, dbPassword);

You can replace the parameters for the connection for example:

String ConnectionURL = “jdbc:mysql://hostAddress/dbName”;

… where hosAddress is your MySQL host address and dbName for your database name. For example, if you have your MySQL running under localhost (or IP Address if you have it somewhere else) and you want to connect to accounts database, you can connect with this:

String ConnectionURL = “jdbc:mysql://localhost/account”;

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J2ME: Java Mobile Application Programming

Posted on May 4, 2009 under Programming. This post currently has 10 comment(s).

Fascinated with those mobile applications you have in your mobile phone? The pre-installed utility tools and games, so called mobile application, are perhaps developed using Java’s Micro Edition – J2ME. J2ME is a subset of the Java platform, along side with J2SE and J2EE.

Since Java is platform independent, developing mobile applications with J2ME is portable as long as your device supports Java. So, check your phone specification if it supports Java (usually stating the version of your MIDP and CLDC). And if it does, you’re good to go or if you do not have it, we can use emulators.

Let us setup your IDE and try to develop a simple application. The IDE I use in developing Java Mobile applications is Netbeans (you can also use Eclipse, JCreator, etc). With Netbeans, you have a complete tools for J2ME mobile programming – editor, debugger and emulators. Just download and install Netbeans and be sure to have the Java Wireless Toolkit with it. This will provide you the capability to run and debug mobile application, assuring that the application you will soon deploy is compliant to your target devices.

So, if your Netbeans is ready to go, check out for some examples to work on at this site – Sun Mobile Device Technology – Code Samples and Apps. Please take note that it is good that you have Java programming experience to be able to understand the code or at least a programming experience.

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Bluehop: Data Transfer using Bluetooth Multi-Hopping Technique

Posted on March 5, 2009 under Programming. This post currently has 2 comment(s).

I am currently finishing my undergraduate thesis entitled Bluehop (Data Transfer using Bluetooth Multi-Hopping Technique). And, the deadline for final defense is set to next week and I am still roughly 40%-60% in progress with the application development. I am not really worried with the paper documentation because it won’t take that much time to write if I have the application ready and tested.

Well, doing this project is quite exciting because I have to study Bluetooth API Programming by just reading and with a thorough research. With that, I learned the foundations about the Java Bluetooth API (JSR-82). I also enrolled to an elective subject last year to learn about Mobile Programming using J2ME.

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Java Mobile Programming: J2ME Using RecordStore (RMS)

Java Mobile Programming (J2ME): Menu, List and Alert

Connecting Java Applications to MySQL Database

J2ME: Java Mobile Application Programming

Bluehop: Data Transfer using Bluetooth Multi-Hopping Technique

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