Motorola C450 User Manual

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Developing and Packaging J2ME Applications  
 

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3 

Developing and Packaging 

J2ME Applications 

Guide to Development in J2ME 

 
Introduction to Development 
This appendix assumes the reader has previous experience in J2ME development and 
can appreciate the development process for Java MIDlets. This appendix will provide 

some information that a beginner in development can use to gain an understanding of 
MIDlets for J2ME series of handsetss. 
There is a wealth of material on this subject on websites maintained by Motorola, Sun 
Microsystems and others. Please refer to the following URLs for more information: 

! 

http://www.motocoder.com

 

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http://www.java.sun.com/j2me

 

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http://www.corej2me.com/

 

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http://www.javaworld.com/

 

As an introduction, brief details of J2ME are explained below. 
The MIDlet will consist of two core specifications, namely Connected, Limited Device 
Configuration(CLDC) and Mobile Information Device Profile (MIDP). Both of these 
specifications (Java Specification Requests) can be located at the 

http://www.jcp.org/

 site 

for reading. 

! 

For MIDP 1.0; JSR 37 should be reviewed. 

! 

For CLDC 1.0.4; JSR 30 should be reviewed. 

! 

For CLDC 1.1; JSR 139 should be reviewed. 

To determine what implementation is on Motorola series of handsets, review the “Java 

System” details through the menu on the Motorola series of handsets (located under Java 
Settings).