Embedded Section Index | Page 2
What is the purpose of the unconditional parameter passed into the destroyXlet() method of an Xlet?
If the unconditional parameter is false, the Xlet can tell the Xlet application manager that it doesn't want to be killed by throwing an XletStateChangeException.
What are the differences between the startXlet() and initXlet() methods of an Xlet?
The initXlet() method is called once, and only one. The startXlet() method can be called multiple times. If an Xlet has been paused (by having pauseXlet() called on itself), the system will call s...more
What's an Xlet?
Xlets are an application model defined in the Personal Basis Profile (PBP) based on the Connected Device Configuration (CDC). It is more similar to applets, but offers an interface defining the me...more
What system properties are available under J2ME?
Sun maintains a list at http://developers.sun.com/techtopics/mobility/midp/questions/properties/. The exact set depends upon the optional packages installed.more
What is the mime type for JAD files?
text/vnd.sun.j2me.app-descriptor
What is the mime type for JAR files?
application/java-archive
What certifications are available for mobile Java developers?
Sun offers a Sun Certified Mobile Application Developer (SMAD) certification for J2ME developers. For more information, see http://www.sun.com/training/certification/java/java_j2me.html.more
What's new in Java Card 2.2? - 07.30.02
What's new in Java Card 2.2 ?
Do the MIDP APIs support server sockets or HTTP connections?
The MIDP 1.0 specification requires all compliant implementations to support the client portion of the HTTP 1.1 protocol. MIDP 1.0 does not require that any other particular protocol(s) be implem...more
What is "3G" wireless technology? How does it relate to J2ME?
Cellular phone technologies have evolved in several
major phases, denoted by "Generations", or "G" for
short.
"3G" refers collectively to third generation
cellular technologies. These technolog...more
What is "2.5G" wireless technology? How does it relate to J2ME?
Cellular phone technologies have evolved in several
major phases, denoted by "Generations", or "G" for
short.
"2.5G" is an acronym which represents various
technology upgrades for existing secon...more
What is "2G" wireless technology? How does it relate to J2ME?
Cellular phone technologies have evolved in several
major phases, denoted by "Generations", or "G" for
short.
"2G" stands for second generation cellular technology.
2G systems use circuit-based,...more
What is "1G" wireless technology? How does it relate to J2ME?
Cellular phone technologies have evolved in several
major phases, denoted by "Generations", or "G" for
short.
"1G" is short for first generation analog cellular technology (AMPS is
one example o...more
What is GPRS?
General Packet Radio Service (GPRS)
is a 2.5G cellular technology designed to be overlayed on top of existing infrastructure in 2G GSM cellular networks. Carriers will leverage all of their pre-e...more
What is SMS?
Short Message Service (SMS) allows GSM-based mobile phones to send and receive short text messages. These email-like messages are of very limited length, often 160 characters or less.
SMS is ...more