Motorola C550 ユーザーズマニュアル
2
J2ME Introduction
The C370, C450, and C550 series of handsets includes the Java™ 2 Platform, Micro
Edition, also known as the J2ME platform. The J2ME platform enables developers to
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
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 C370, C450, and C550 series of handsets, service
providers, as well as customers, can easily add and remove applications allowing for
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 C370, C450, and C550.
overview of the J2ME environment and the tools that can be used to develop applications
for the C370, C450, and C550.
The Java 2 Platform, Micro Edition (J2ME)
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
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
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
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.
Configuration Layer is the Profile Layer, typically encompassing the presentation layer of
the Java Platform.