J2ME/MIDP GUI development issues

Hello,
I'm newbie to J2ME/MIDP development .
And I'm curoius about main GUI issues when developing games for mobile phones.
Such as different screen sizes, sprites, etc.
How ppl target for different screen sizes and resolution?
Links for usefull reading is appriciated very much.
Thank you.
Alexei.

There are two configuration
1.CDC
2.CLDC
and Following profiles for the developers to choose from while developing the application for a wireless deveice
for CLDC-
1.MIDP
2.PDAP
for CDC-
1.Foundation Profile
2.Personal basis Profile
3.Personal Profile
Apart from these profiles (JAVA APIs) development can be done in
1.c/c++
2.net
Now my questions or rather the issues that i always face or rather i always get confused over it
1.How to know that a particular device supports which Configuration
Check the device Specifications, Nokia supports maybe java, while motorola supports may be .NET
2.After the configuration is known, which profile is to be used.
Depends on what you want to develop, once you know that then you will read the profile spec. and then go for development, let say if you wanted to develop a simple game, it can be done in MIDP only, while if you need advanced multimedia, u need implementation of MMAPI also, on the other hand if you want to develop diary of contact managment software you will yous PIM.You should know the wanter in pool before taking of your clothes and going for a swim.
3.For developing the application in c++, do different device category give different set of APIs for development.,plz explain.
Most of the C++ api's are devices specific(after all that is when java wins)
4.What about the development platform for PALM and POCKET PC devices.what profiles from the above listing do they use .
they use the CDC configuration, and Personal Profile
5.can development on POCKET PC be done only on compact .net framework???
No, Commercial JVM are available, infact a free one is also available, search this forum you will find out.
Hope this help

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J2ME Polish have licensing costs associated with it:
http://www.j2mepolish.org/licenses.html
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Image offscreen = isDoubleBuffered () ? null :
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Hi,
I am new to developing for J2ME/MIDP and have not been successful in finding any language documentation to help me further my knowledge.
As a case in point, I have a sample app that I have been playing with, it is very simple and uses an object of type TextBox as follows...
private TextBox t;
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The documentation is part of the SDK when you download it.
If you downloaded the Wireless Toolkit or any other SDK, there should be a docs directory there with all the documentation (and if you don't have any SDK you can't do much development in any case).
As for the TextBox issue you would need something like:
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shmoove

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Did you see netbeans site?
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I am currently in a process of evaluating the IDEs, Eclipse and NetBeans on Linux desktop environment (SuSE 10.3).
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atomodachi wrote:
Now I ask a question, what is the best practice to adopt for starting the GUI development ?
NetBeansThis is my preference for IDE's. Please note that as I stated that is my preference. There isn't any best, some are clearly better than others for one reason or another, but once again, that boils down to personal preference.
EclispseNot my preference.
IDE-less development ?IMO: that is just silly. Unless you just enjoy tons of typing; why would you ever embark on doing something without a tool to speed up the process. Now that is not to say that in using your IDE you should start out by just dragging and dropping up a storm and merrily running down the road in ignorance until you hit a rough spot and have things dramatically pointed out that you've really not a clue about what is happening. Use the IDE, but learn how to do the manual processes along with it. That means that sometimes you'll not drag and drop to build your GUI, you'll actually code the entire thing. And you really should learn to do things command-line like compile. Do yourself a really big favor too, learn the debugger. The integrated debuggers is, perhaps, one of the best inventions in productivity tools that has as of yet been invented for developers.
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Oracle 11g - External Table/SQL Developer Issue?
==============================
I hope this is the right forum for this issue, if not let me, where to go.
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======================
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ACCESS PARAMETERS (
RECORDS DELIMITED by NEWLINE
SKIP 1
FIELDS TERMINATED BY "," OPTIONALLY ENCLOSED BY '"' LDRTRIM
REJECT ROWS WITH ALL NULL FIELDS
MISSING FIELD VALUES ARE NULL
DATE1 CHAR (10) Terminated by "," ,
DATE2 CHAR (10) Terminated by "," ,
POL_PRTY CHAR (30) Terminated by "," ,
P_NAME CHAR (30) Terminated by "," OPTIONALLY ENCLOSED BY '"' ,
P_ROLE CHAR (5) Terminated by ","
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It is loading all NULL value record (Rec # 6)
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Log file has
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KUP-04036: second enclosing delimiter not found
KUP-04101: record 2 rejected in file ....
Our questions
Why did "REJECT ROWS WITH ALL NULL FIELDS" not working?
Why did Terminated by "," OPTIONALLY ENCLOSED BY '"' not working?
Any idea?
Thanks in helping.

I don't think this is a SQLDeveloper issue. You will get better answers in the Database - General or perhaps SQL and PL/SQL forums.

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Hi everybody!
I'm quite new in ALBPM and I have some questions about it, especially about user interfaces.
I've been developing JSP aplications (using MVC frameworks) for a long time, and I can't figure out how does it fit in the ALBPM world.
What's the paradigm for GUI development? At first, I believe the screenflow should act like the controler, the BPM object is the model, and the custom JSPs are the views.
But... sincerely for me, the Screenflow/BPM object/Custom JSPs seem less flexible than a regular MVC (Struts, JSF, ...)
My question is: Is it mandatory to use screenflows, or I'm able to use a MVC architecture inside ALBPM? If it's possible how should I implement it?
For example: I have a custom JSP with some menu items, and this items are links to other JSP pages. This behaviour should
be modeled using screenflows or can I use another approach? What's the best practice for this task?
In MVC architecture, the menu will be inside an html form with an action pointing to a servlet (a controller). And what about screenflows?
Well, I'd like to hear some opinions about this, especially because i'm triyng to get used to BPM paradigm, and in my opinion the best approach for this is hearing from people who had experienced this situation.
Thanks in advance,
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Hi Thiago,
I think I see what you're asking. Let me know if I'm missing your point.
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At this point, you'll have a clean Model BPM Object - uncluttererd by presentations and presentation methods. You'll have View BPM Objects that will be used exclusively inside Global, Interactive, Global Creation and Interactive activity screenflows.
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Second, after creating this process with the BPM Object (usually the process at this stage just shows the "Happy Path") I'll add the necessary Interactive activities used in the process. (finally getting to your question) I then create screenflows for each of the Interactive activities (right click the activity -> Main task -> pick screenflow from the dropdown -> New). As you're doing this from this panel, be sure to map the Model object as both an incoming and outgoing variable into and out of the screenflow. Some people also map the "result" predefined variable as an outgoing variable from the screenflow. If you do it this way, you'll not have to do any of the 4 argument mappings you'd have to do had you added the incoming and outgoing variables manually. If you decide to do this manually, many times you'll find yourself spending an hour tracing down where you lost the contents / changes made inside screenflows.
This best practice makes it easy to pass in and get back the Model object to and from the screenflow. Once inside the screenflow, you'd do the Model to View to Model object mapping described in my earlier post.
hth,
Dan

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Introducing JavaStates - a new API for state based GUI development in Swing

JavaStates partially implements the semantics of D Harel' statecharts.
It is currently hosted as source forge project:
[https://sourceforge.net/projects/javastates/]
, and has been used for several years for teaching Java Swing and the specification of man machine interfaces at ESIL
[http://www.esil.univmed.fr]
[http://laurent.henocque.com]
The project provides several demos, including a full fledged swing text editor, and is stable.
Details can be found here too:
[http://javastates.posterous.com/]
I'd be very happy to interact with both experts and users.
I claim that Javastates tremendously improve the quality and speed of GUI development.
Do you agree?
Edited by: lhenocque on Mar 4, 2010 4:18 AM

Thanks for the good practise hint, and many more thanks for your interest.
I haven't tried anything but don't you get an explosion of states?
explosion of states is controlled by concurrent regions. Two states in two concurrent regions can be active at the same time.
There can be no 'explosion' anyway since the states are programmer declared. The list is finite, and under control.
For example the program I'm working on has a table and actions are enabled based on:
-no selection/single selection/multi selection
-top/bottom row selected (move up/down action)
-user read/write permission
-properties of the object of the selected row
The situation you describe is handled by (at least) four concurrent regions.
The typical error is usually forgetting a particular one which result in action being enabled/disabled when the shouldn't. Currently solving that by having a callback method which enables all the action correctly and gets called whenever there is a selection/security/etc update.
Javastates cares for both setting the properties of the states (including the callbacks to fire) and for the cleanup. Using this allows for defect free interfaces in the sense that nothing can be left over.
Using Javastates helps you to separate your logic in the same way as object programming with virtual functions does. You should end up replacing a code with many if/thens by separate listeners, dynamically set by callbacks.
Also fluent interface method chaining is nice until it becomes a flood in my opinion - similar to how GroupLayout is better handled by Matisse GUI builder than by hand, JavaStates might benefit more from a graphical tool.
You are right. Both apis exist. The fluent api is provided for simplicity, since it prevents from declaring useless local variables.
Also for a GUI builder. I created the foundation of Javastates for an interpreted language called WIZ in the IDE Openside around 1990 (that was in C).
Then later I implemented a subset of the current Java features in C++, that were interfaced in the GUI Builder called ILOG Views.
So yes I agree a GUI can help, but anyway the Java code resulting from using states is mare more concise and structured than it would otherwise.

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