Java ME - Tips, Tricks & Code Archive

This section contains Tips, Tricks and Code samples for creating Java™ ME Platform applications for Sony Ericsson phones. Tips specifically addressing Mobile 3D development have been gathered under the Mobile 3D Tips, Tricks & Code section. This page includes the categories:

Media
Communication
UI & components
Tools & SDK
Other

LATEST ARTICLES

New Java ME Tips, Tricks & Code articles are published in the Developer World community wiki here

COMMUNICATION

Here are Tips, Tricks & Code describing different types of communication such as http, Bluetooth™, IR, SMS and much more.

January 2008

JSR 238, localize your data with Internationalization API

December 2007

Creating MIDlets for HGE-100 GPS enabler accessory

April 2007

Serial port connection using Java ME for P990, M600 and W950

October 2006

Post Java ME file to web server

February 2006

JSR 82 example, Bluetooth probe

December 2005

Advice on managing connections between Bluetooth SDP records and a game server

December 2005

How to send an MMS using JSR 205

November 2005

Measure Bluetooth connection performance

August 2005

Part two: The server side of using irDA with the OBEX protocol

July 2005

Connecting to a GPS receiver using Bluetooth (JSR 82)

June 2005

Part one: Using irDA with the OBEX protocol to create a client application

January 2005

Go streaming with V800

October 2004

Easy web browsing without GPRS

December 2003

Using PushRegistry with SMS Communication

December 2003

BluePad - a Bluetooth Based Sketch Board for P900 Phones

November 2003

Controlling Bluetooth Mini Race Car from the P900

December 2003

Class Headlines

November 2003

Collecting News Headlines Over the Internet

September 2003

J2ME Networking with the MicroGraph Application

September 2003

Avoid Connection Problems with Your Java Applications on the T6xx and Z600 devices

August 2003

Understanding Networking in CLDC

March 2003

Fast stream reading in Java

February 2003

Ensure correct HTTP response code handling for your Java app

OTHER

Topics included here are RMS, memory issues, MIDlet properties and many more that don't fit into the other Java categories.

Updated January 2008
November 2007

Changed Java™ ME permission settings

September 2007

Alerting the user from a minimized MIDlet, JP-7 and above

August 2007

Utilize the W910 accelerometer in the Java ME Platform using JSR 256 - The Bouncing Ball Game

December 2006

System font effects for MIDP 2.0 phones

November 2006

Minimizing MIDlets

September 2006

Autostarting MIDlets in JP-7 phones

May 2006

How to create a standby MIDlet for Java Platform 7 (JP-7) phones

October 2005

JSR 75: Accessing the PIM database and File system
Part two: The PIM API

September 2005

JSR 75: Accessing the PIM database and File system
Part one: The FileConnection API

July 2005

Introducing XML Parsing with JSR 172

January 2005

Common failures in Java Verified

November 2004

Hardware Java acceleration with Jazelle

November 2004

Compliments of DataMirror: JDBC access for J2ME MIDP based Java applications

October 2004

Designing your MIDlet for JavaVerified

October 2004

Getting MIDlet firmware version info

October 2004

Using JAD file to configure screen size on V800

September 2004

How to make a winner - Tips from Sony Ericsson Game Developers Challenge 2004 jury

September 2004

Dividing big MIDlets into two parts

September 2004

Game ideas and common genres

September 2004

Getting started with games development

August 2004

Application using platform request

July 2004

Localizing your MIDlet

June 2004

Image memory handling on K700

May 2004

Serializing an image in MIDP 2.0

May 2004

Adding cryptographic to your MIDlet

April 2004

Sorting the records from the RecordStore

April 2004

Importing data to a MIDlet

March 2004

Z1010 supports CLDC1.1

February 2004

Larger canvas size and access to restricted API's

February 2004

Make your Java games go global

February 2004

Running MIDlets in flip-closed mode

February 2004

Is ServiceRepaints() really a blocking call?

January 2004

Deadlock drawing in Java applications

January 2004

Use OTA for PushRegistry in MIDP 2.0

January 2004

Optimize method signature in MIDlets for performance

December 2003

Reading System Properties in MIDlets

November 2003

How to Optimize Loops in Java MIDlets

November 2003

Avoiding Memory Fragmentation

November 2003

RealtimeClock in J2ME Applications

November 2003

InfoTest - Querying the Supported Media Types and Protocols (MMAPI)

October 2003

How to Make a J2ME MIDlet Sleep (all Sony Ericsson J2ME devices)

October 2003

RecordStore in J2ME MIDlets

September 2003

Avoid Connection Problems with Your Java Applications on the T6xx and Z600 devices

August 2003

Understanding Record Management System in J2ME

July 2003

Recordstore Size Information for the T6xx and Z600 devices

June 2003

Launching Applications from Java on the Sony Ericsson P80x and P90xs

May 2003

How to create a Java MIDlet using a simple Hello World example

May 2003

Approximating floating point values using integers in J2ME/MIDP applications

May 2003

Improving performance on constant multiplications in J2ME/MIDP applications

May 2003

Using sine and cosine math calculations in J2ME/MIDP applications

May 2003

Efficient RMS data management in J2ME applications

April 2003

How to handle interruptions such as incoming calls on Sony Ericsson J2ME devices

March 2003

Fast stream reading in Java

March 2003

Fast iterating through an array or vector in Java

MEDIA

February 2008

These Tips, Tricks & Code are relating to graphics and sound such as media capturing or playback, image handling, Canvas issues and so on.

February 2008

JSR 234 Advanced Multimedia Supplements API, controls overview & examples

January 2008

JSR 135, recording PCM (.wav) sound in JP-8

December 2007

Hide files from JP-8 Media UI using JSR 75

October 2007

Use GameCanvas for more than games

March 2007

Interrupt the screen saver on Java ME phones

February 2007

FM radio player using JSR 135 on UIQ 3-based phones

January 2007

Getting started with SVG and JSR 226

July 2006

Camera control using JSR 234 in Java Platform 7 (JP-7) phones

April 2006

Stream and play music from the web using Java ME

January 2006

Collect meta data from a media stream with MetaDataControl

November 2005

New features in the Mobile Media API (JSR 135): progressive download and audio capture

May 2005

How to control sound volumes in Java

April 2005

Using simultaneous sounds

December 2004

Image optimization in more ways than one

October 2004

A case study:
Porting Java applications from Nokia - The Pocket Panic experience

October 2004

Using JAD file to configure screen size on V800

September 2004

Designing horizontal mode games for the S700 series

August 2004

Full canvas on Sony Ericsson P910

June 2004

Image memory handling on K700

May 2004

Serializing an image in MIDP 2.0

April 2004

Taking snapshots with the Z1010 camera

May 2004

Optimization of Z1010 image handling

April 2004

Graphic memory on the Z1010

March 2004

Display a Java splash screen

February 2004

Larger canvas size and access to restricted API's

February 2004

Is ServiceRepaints() really a blocking call?

January 2004

Deadlock drawing in Java applications

December 2003

Compliments of Sumea: Java Optimization Tips & Tricks

November 2003

Using GameCanvas in MIDP 2.0

November 2003

Paddleball - Simple "Pong" Type Game

November 2003

Scribble Drawings on the P800/P900 Screen

November 2003

PlayAudio - Demonstrating the MIDP 2.0 Media API and MMAPI (JSR-135)

November 2003

InfoTest - Querying the Supported Media Types and Protocols (MMAPI)

September 2003

How to Reduce Jerky Animations and Delayed Sound Playback When Using the MMAPI on the Sony Ericsson T610 and Z600

August 2003

Optimization of Speed and User Experience on J2ME devices with the Dancer Application

July 2003

Image Sizes and Transparency on the T610

July 2003

How to create a Java MIDlet using a simple Hello World example

April 2003

Basic Mobile Media API snippet (Audio) for the Sony Ericsson T610

April 2003

Writing a J2ME application that adapts to the screen size

April 2003

Using images on the Sony Ericsson T6xx and Z600 devices

UI & COMPONENTS

This section deals with user interfaces, components, user interactions such as event handling. key presses and so on.

March 2006

May 2003

TOOLS & SDK

Here are Tips, Tricks & Code relating to different tools, which may or may not be part of the J2ME SDK, but are aimed at making life easier for developers.