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Did You
Know?
OTA support
in WTK 1.0.3
Did you
know that there is OTA support in WTK 1.0.3 and WTK 1.0.4.
This is a hidden support given by WTK1.0.3/WTK1.0.4 at command
line unlike the OTA support given at the GUI level in WTK2.2
- In
the Command prompt go to "<WTKHOME>\bin"
- Enter
command "emulator -Xjam" and press enter
- Emulator
with OTA support opens up
First
device to be J2ME enabled
Palm OS
device was the first device to support J2ME. In one of them
SunOne Conferences J2ME was released and the attendants where
told to hotsync their devices with J2ME at the booths. These
guys then Hotsynced their Palm tops but didn’t know what
to do with it as there where no applications for them to install.
But now after a few years there are millions of applications
out there.
Virtual
Machine Logs
Virtual
Machine logs can be used to see the logs due to System.out.println’s
for an application running on the mobile. This is supported
by select devices.
Cursors
disappear due to themes
Themes
could some times make cursors disappear. This happens when
the cursor color is same as the theme color.
J2ME Java Native Interface
Inter
Process communication has always been an issue with J2ME but
there is a workaround for this issue. Your J2ME application
can communicate with the Mobile’s Native OS using Sockets.
Create a Client Socket in J2ME and a Server Socket in device’s
native OS. A fabulous proof of concept for this approach is
at http://www.midpjni.com/ . This proof of concept is for
Symbian OS.
Concurrently
run Multiple J2ME Applications
Palm OS
started a trend of having only one application running at
a time due to memory constraints in those days. This was followed
by number of other technologies like J2ME and Brew following
suite. But there are some KVM’s that run multiple MIDlets
concurrently. Motorola iDen series for one can run three MIDlets
at a time.
First
J2ME Virus
The first
J2ME virus is supposed to be Redbrowser.A, This midlet pretends
to be a WAP browser and sent SMS messages to premium Russian
service which charged 5 US$. This was a dumb virus and could
not propagate by itself. This virus was detected in February
2006.
Know
where your mobile is manufactured
The source
of this article is chain mails and may not be true. This may
be just an urban legend. Type *#06# to get a serial number
like “355023007165261”. Now comes the urban legend
part(country of manufacturing).
- If
the 7th and 8th number is 02 or 20, then your mobile is
assembled in Emirates.
- If
the 7th and 8th number is 08 or 80, then your mobile is
assembled in Germany.
- If
the 7th and 8th number is 01 or 10, then your mobile is
assembled in Finland.
- If
the 7th and 8th number is 00, then your mobile is assembled
in France.
Know
when your Nokia mobile was assembled
Type *#0000#
to get your Nokia’s manufacturing date and version.
To know
warranty information type *#92702689#, some of the fields
can be edited.
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