Getting Started with J2ME

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A brief introduction of  what is J2ME? is a good place to getting started. As with any other technology J2ME has its own set of toolkits and IDEs.

Sun Java Wireless Toolkit
A free development environment directly from SUN is the Sun Java Wireless toolkit. It is a free IDE which can be downloaded at http://java.sun.com/products/sjwtoolkit/index.html 

Netbeans mobility pack
If you are more comfortable with Netbeans development, this is another free toolkit which you can use to develop J2ME applications. This is downloadable from http://developers.sun.com/prodtech/javatools/mobility/downloads/index.jsp

If you are familiar with other Java development tools such as Code Warrior or Borland JBuiler etc, then you can search for an extention for developing J2ME applications using your existing IDEs.

There are other device specific J2ME toolkits provided by the device manufacturers. An important point to note here is that if you are using one of these toolkits such as Motorola's or Nokia's toolkit, is that there is a tradeoff in using these proprietary toolkits.

The advantage of using these proprietary toolkits is they are API rich and have many inbuilt device specific apis that can be used in your J2ME application. Motorola for example provides rich APIs to support their GPS enabled J2ME phones. Nokia's toolkit has many Games APIs to support their Nokia phones.

The disadvantage of using proprietary toolkits is that they are no more portable. But if you are targeting a specific model or make of phones or devices then using these toolkits are the way to go. However, if you are developing a J2ME program targeted towards a wide range of phones and devices then it is best to use the Sun Wireless toolkit.

In addition to these toolkits and manufacturer specific APIs, there are other third party APIs for specific functionalities. For instance, Symbol provides the APIs for its Barcode scanners. A J2ME device when attached to these barcode scanner will have to use this third party API to control it from a J2ME program


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Comments(10)


1. View Comment

good

View Tutorial          By: yeoh at 2009-04-18 21:32:36
2. View Comment

really good

View Tutorial          By: ammu at 2009-11-04 05:07:14
3. View Comment

really really very good
thanks all
and always forward >>>>>>>


View Tutorial          By: bade3 at 2010-01-01 18:52:15
4. View Comment

i need How to connect with database connection in j2me Apps

View Tutorial          By: Renjit at 2010-01-04 01:54:25
5. View Comment

I need how to connect with database connection in j2me too, but i need this sample with Netbeans 6.7.1 project, thanks

elplasencia@yahoo.es


View Tutorial          By: BenGunn at 2010-01-12 03:33:44
6. View Comment

Thank you , It is really good for beginners.

View Tutorial          By: Satish Kumar at 2010-01-18 03:06:49
7. View Comment

good one

View Tutorial          By: yogesh at 2010-07-24 21:18:24
8. View Comment

Verrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrry
Guuuuuuuuuuuuuuuuuuuuudddddddddddddddd.............


View Tutorial          By: Amarnath.A at 2011-07-14 00:32:08
9. View Comment

i build j2me application for reading text file.......
it runs on emulator but when i deployed it on device it does not
work......
why this is ....happening.....
my mobile is Nokia 3110C
code...is......

import java.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class ReadFile extends MIDlet implements CommandListener{
private Display display;
private Form form;
private Command read, exit;
private Alert alert;

public ReadFile(){
display = Display.getDisplay(this);
read = new Command("Read", Command.SCREEN, 1);
exit = new Command("Exit", Command.EXIT, 1);
form = new Form("Read File");
form.addCommand(exit);
form.addCommand(read);
form.setCommandListener(this);
}

public void startApp(){
display.setCurrent(form);
}

public void pauseApp(){}

public void destroyApp(boolean unconditional){
notifyDestroyed();
}

public void commandAction(Command c, Displayable s){
String label = c.getLabel();
if (label.equals("Read")){
String string = null;
try {
string = file();
} catch (UnsupportedEncodingException ex) {
ex.printStackTrace();
}
if (string != null){
alert = new Alert("Reading", string, null, null);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert, form);
}
} else if (label.equals("Exit")){
destroyApp(false);
}
}

private String file() throws UnsupportedEncodingException{
InputStream is = getClass().getResourceAsStream("/data/aardvark.txt");
InputStreamReader isr=new InputStreamReader(is,"Unicode");
StringBuffer sb = new StringBuffer();
try{
int chars, i = 0;
while ((chars = isr.read()) != -1){
sb.append((char) chars);
}
return sb.toString();
}catch (Exception e){}
return null;
}
}


View Tutorial          By: ganesh at 2012-10-17 10:34:00
10. View Comment

really nice and perfect ! thnak you very much for J2ME section !

View Tutorial          By: arash at 2013-07-16 10:58:45

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