Network Programming with J2ME Wireless Devices

by Yu Feng
Overview
The wireless devices such as cell phones and two-way pagers keep their owners
connected to the outside world at anytime from anywhere. They offer great
connectivity that other types of devices couldn’t offer. Application development for
these wireless devices is going to be in great demand for the next couple years.
Network programming plays an important role in wireless application development
to take advantage of the connectivity these devices have to offer.
Sun’s Java 2 Micro Edition (J2ME) offers a great development platform for
developing applications for the embedded electronics and mobile devices. In Java 2
Micro Edition (J2ME ), the Connected Limited Device Configuration (CLDC) defines a
generic "configuration" for a broad range of handheld devices. On top of CLDC, the
Mobile Information Device Profile (MIDP) is defined specifically for wireless devices
such as cell phones and two-way pagers. Wireless device manufacturers need to
implement MIDP in order to support Java applications on their devices. For
example, Motorola is going to release the MIDP implementation for its iDEN mobile
phone family in the Q1 of 2001. Research In Motion is also going to release the
MIDP implementation for its Blackberry pager family soon.
In the next section, we will take a look what’s new in J2ME network programming.
Later in this article, we will examine the HttpConnection class in J2ME MIDP. We will
conclude with a complete example of how to use the HttpConnection class.

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