Database In Java ME For Palm
Database In Java ME For Palm I'm developing a program written in Java ME for Palm OS that creates a DB, read and write on it too, but I need to know somethings: How can I create PDB files using Java ME? When I use a RecordSet on Java ME I'm acessing a PDB? How to access a PDB in Java ME? Thanks

Java ME libraries
Java ME libraries Java ME is quite sparse on features. Are there any libraries you use to add missing features? I don't want to focus on UI libraries - these are better discussed here. I am aware of that there exists JSRs with optional features. Java ME was intentionally designed to be based on JDK 1.3, so yes it is quite old and sparse. But a lot of handset manufacturers (like Nokia) have their custom API that provide some valuable functionality. There are ways to provide support to more standard Java like features like enums by using tools like Retroweaver, which allow us to compile them with Java ME. I have also heard that J2ME Polish like frameworks have custom implementations that are more sophisticated. Hope this helps. There is some useful stuff at j4me.org. For various crypto functions, The Legion of the Bouncy Castle Lightweight API for J2ME

java me textfield
java me textfield i want to have default text in a textfield which disappears when the textfield gets focus. similar to the google search box in firefox. also with java me is it possible to set a background image for a display. The answer of your second question is easy. Unless you use canvas, it is not possible. AFAIK you cannot handle focus events on a textfield in J2ME so it is not possible

Java ME draw rectangle.
Java ME draw rectangle. How can I draw rectangles with Java ME? Sorry, but I am new to Java and have to use Java ME for this project. It's hard to know exactly how much detail to go into because you don't mention what you've done with ME so far, but the basic idea is: Override the Canvas class with your own class Override the paint() method Inside the paint() method, you can call drawRect() or fillRect() on the Graphics object that's passed in Elsewhere (e.g. in the startApp() method of your MIDlet class), set an instance of your canvas to be the current display So example code looks... = new MyCanvas(); Display.getDisplay(this).setCurrent(c); } ... } Good guides to Java ME should give you an overview of other methods available on Graphics, other code you'll need in your MIDlet class, how to handle Commands (for handling button presses) etc

Animation in Java ME
Animation in Java ME How could I implement animation in Java ME? I would want to achieve the following, I want to make a List the items in the List are animated icons with some related text description... I would like to animate all these Icons simultaneously... I'm afraid you cannot do that with the standard List component. You will need to implement your own or use a third-party component. UPDATE I was wrong actually: you can use a CustomItem and have a timer call repaint() every x milliseconds

pauseApp Java ME
pauseApp Java ME what actions should be taken in the pauseApp method of a Java ME midlet. what is the purpose of having this method. This is a pretty good description. Say you are writing a Tetris game, you would stop the brick from falling when paused. On a phone, interruptions happen and resources are limited, so you need to write your code to accommodate them. Midlet javadoc tells us that this method is called when the application is set in paused mode. Paused mode corresponds to the event of the user pausing the application, or the application being paused by something more urgent, like a phone call

Java (ME) on Windows Mobile
Java (ME) on Windows Mobile Does anyone have experience deploying Java ME apps to Windows Mobile? What are the high-level steps to getting started with this, and are there any major drawbacks? Just beginning with the Samsung i900. FileConnection seems all bad with no obvious access to the internal hard drive or the memory card. Worried about the Applix jBlend base port. I hope others have a better experience of java on windows mobile. Well at first you need to install a JVM on your device (if one isn't already installed). There are currently two players for this: NSI Creme... for older devices. Windows Mobile 5 and 6 come with a pre-installed Microsoft Java VM which works. Basically. You can actually just compile your J2ME application to a jar file, copy it on your Windows Mobile device and start it. That's pretty much it. As with all generic JavaME VM's you

Yes/No dialog in Java ME
Yes/No dialog in Java ME I'm looking for a simple solution for a yes/no dialog to use in a Java ME midlet. I'd like to use it like this but other ways are okey. if (YesNoDialog.ask("Are you sure?") == true) { // yes was chosen } else { // no was chosen } I dont have programed in Java ME, but i found in it's reference for optional packages the Advanced Graphics and User Interface API, and it's used like the Java SE API to create these dialogs with the JOptionPane Class int JOptionPane.showConfirmDialog(java.awt.Component parentComponent, java.lang.Object >message, java.lang.String title, int optionType) Return could be JOptionPane.YES_OPTION, JOptionPane.NO_OPTION, JOptionPane.CANCEL_OPTION ... Using the JOptionPane Class in Advanced Graphics and User Interface API (JSR-209) is a good suggestion. Unfortunately mobile phones do not implement that particular JSR yet so

Is the situation with Java ME improving?
Is the situation with Java ME improving? It seems to be the consensus that developing for Java ME is not as cross platform as you might expect, particularly compared to say java SE, but it is difficult to assess how the situation is evolving. Is the situation improving significantly? Are problematic implementations being patched? Are problematic implementations dying out as a proportion of mobile devices? Is the tool chain improving? Are there ways to identify at least some cross platform 'errors' without necessarily deploying to each and every device? I think the main improvment happening in J2ME is that the number of different implementations is decreasing. Sony-Ericsson, Samsung and Nokia all release J2ME platforms that are consistant across a large number of device models. This means that by testing on under 10 devices, you can actually deploy to many millions of handsets

Java ME object persistence
Java ME object persistence I know that Serialization (Serializable) is not available in the Micro Edition of Java. It's kinda straight forward to save primitives like int and java.lang.String objects with the RMS. But if I want to save (make persistant) an arbitrary object? Is that possible? Unfortunately there's no way to save an arbitrary object without writing code for it, since reflection is severely limited in J2ME (you can look up classes, but can't look up their fields and methods). You can use the Connection API to write the data to a File/Stream. Please keep in mind that it is easy to persist the data in to a Stream but inorder to restore the data from the Stream you will have to write your own code. Usually reflection is used for this purpose and it becomes a bottle neck on many devices. So instead of re-inventing the wheel I would advise using Floggy (http

Java ME out of memory
Java ME out of memory Hello everybody, Im making Java me application for Symbian S60 5th edition and I have problem with the memory. After some time of running the app I recieve the out of memory exception. So,Im getting images from GoogleMaps(by the integrated GPS in nokia 5800) and showing them. I have this implemented like this: class MIDlet with metod setForm() class Data which has thread that collects info about the coordinates, gets image from google maps, create new form, append the image, and call the method setForm(f) from the Midlet. Probable the Display.setCurrent(Form f) keeps references on the forms and like this the memory gets fast full. I tried with Canvas but it has some stupid UI(some circle and some 4 buttons) that I dont like. Any idea how to solve the problem? thanks in advanced, Milan PS: the code.... In class MIDlet public void setInfo(Form f

Java ME UI libraries
Java ME UI libraries Guys, I'm developing a Java ME app & need pointers to some really good UI libraries. I did see a few such as JavaME Polish. Are there any more out there? For e.g. ebuddy's java ME app has an amazing UI and so is gmail's java ME app. What libraries would they have been using or would have they have developed it on their own? Please help me. Thanks. I've used SWT when deploying to a full profile J2ME (IBM J9 on PocketPC), I don't know if it is usable by MIDlets however. It's quite a nice GUI library in its own way, and far better than AWT. eSWT would be available for MIDlets on the latest J9 VM, as used by the Series60 3rd Edition feature Pack 2 handsets (Nokia N78, 6210, N96...) but we're mainly talking about nicer looking UI controls. Basically, a MIDlet can look much more like a native application now. Sun has recently open-sourced LWUIT.That could also

Networking problem in Java ME
Networking problem in Java ME Ok, so I'm using Java ME to connect to a PHP script on my server, but for some odd reason the networking will only work the first time the app is run on the phone after installation. Any other time, it won't even ask permission to use the network. Here's the method...(); } } catch (IOException ignored) { } } return messagebuffer.toString(); } Any ideas? For me this code seems not to be the problem. Created a quick test MIDlet and everything worked on emulator and SonyEricsson W960. My test form: class TestForm extends Form implements... only once per application run. Check that this method is even called after initial calling :) /JaanusSiim The use of "static" reminds me that JavaME virtual machines usually don't unload classes. I know that at least the Series40 platform leaves the VM process running all the time so static

Class.getSuperclass() replacement on Java ME?
Class.getSuperclass() replacement on Java ME? How can I get the the superclass of a Class instance in Java ME. That is, fake the Class.getSuperclass() functionality with the limited functionality available in CLDC 1.1? What I want to do is to let the abstract super class do something like this: public Styler getStylerForViewClass(Class clazz) { Styler s = stylers.get(clazz); if (s == null) { for (Class c = clazz; s == null; c = c.getSuperclass()) { if (c == Object.class) { throw new IllegalArgumentException("No Styler for " + clazz.getName()); } s = createStylerForViewClass(c); } stylers.put(clazz, s); } return s; } public Styler createStylerForViewClass(Clazz clazz) { if (clazz == View.class) { return new DefaultStyler(); } else { return null; } } Sub classes could then add specializations like this: public

Advertising API for Java ME applications?
Advertising API for Java ME applications? Hello, I know AdMob is not for Java ME. Do you know any other advertising API or services that can be used in Java ME application? It might be really good if I can earn some money with my free Java ME applications. http://adfonic.com/ Adfonic is what can I find now. You can follow it's instruction from http://developer.adfonic.com/index.php/Getting_Started to allow mobile advertising from Java ME application