J2Me Introduction; The Java 2 Platform, Micro Edition (J2Me); Figure 1 Java Platform - Motorola C381P J2ME Technical Manual

J2me developer guide

Table of Contents

J2ME Introduction

The Motorola C381p handset includes the Java™ 2 Platform, Micro Edition, also known

as the J2ME platform. The J2ME platform enables developers to easily create a variety of

Java applications ranging from business applications to games. Prior to its inclusion,

services or applications residing on small consumer devices like cell phones could not be

upgraded or added to without significant effort. By implementing the J2ME platform on

devices like the Motorola C381p handset, service providers, as well as customers, can

easily add and remove applications allowing for quick and easy personalization of each

device. This chapter of the guide presents a quick overview of the J2ME environment and

the tools that can be used to develop applications for the Motorola C381p handset.

The J2ME platform is a new, very small application environment. It is a framework for the

deployment and use of Java technology in small devices such as cell phones and pagers.

It includes a set of APIs and a virtual machine that is designed in a modular fashion

allowing for scalability among a wide range of devices.

The J2ME architecture contains three layers consisting of the Java Virtual Machine, a

Configuration Layer, and a Profile Layer. The Virtual Machine (VM) supports the

Configuration Layer by providing an interface to the host operating system. Above the VM

is the Configuration Layer, which can be thought of as the lowest common denominator of

the Java Platform available across devices of the same "horizontal market." Built upon this

Configuration Layer is the Profile Layer, typically encompassing the presentation layer of

the Java Platform.

CLDC

Native System Software

Mobile Information Device

J2ME Introduction

MIDP-Compliant

Apps

MIDP

Native

OEM

Apps

OEM

Classes

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