Most probably 2 years ago I had decided to swap from C#.NET to Java.But at the time of its beginning I found it so messy than that of C#.As I desired to develop applications for my famous China Phone(Network down most of the time but supports java) at last I did it at the end of 2010.Now I'll discuss how to prepare your desktop to develop your first j2me applications .
We can divide J2ME framework into three main parts namely Configurations, profiles and optional packages
Configurations: A configuration contains the KVM and important class libraries, It defines the minimum hardware specifications required for your applications. There are two types of configurations CLDC and CDC, CLDC(Connected Limited Device Configuration ) is used for lower level devices while CDC(Connected Device Configuration) aims at relatively high end devices like smartphones.
Profiles: A Profile lies on top of the configuration layer and provides useful set of API-s and important packages. several profiles can target same configuration for example MIDP profile targets CLDC
Optional Packages: As the name suggests this layer contains the optional packages which may be included in J2ME enabled device for e-g, Bluetooth package.
Required Software as well as IDEs:
1.Java Development Kit (JDK), download the latest jdk and install it.
2 Java Wireless Toolkit, download latest version of Sun java Wireless toolkit and install it.
3.Then Install IDE as you wish (e.g. Ecllipse or Netbeans)(I will use Netbeans 7.0 in this post but I prefer Ecllipse)
Let the following instructions be followed:
1.Open Netbeans IDE(e.g.Start menu>>All Programs>>Netbeans>>Netbeans 7.0.exe)
2.Under the File menu select New Project...>>Java ME(Category)>>Mobile Application(Projects)
3.Click Next.Then Set Project's name click Next.Select Device & its Configuration(CLDC 1.0,Profiles:MIDP 2.1 ).The Next and Finish.
4.From Run menu Run Main Project.
5.Your display should contain the figure(or like this) given below:
Deployment of your Project as *.jad or *.jar:
To deploy as *.jad or *.jar simply Go to the Run Menu click on Clean and Build Main Project or press Shift+F11.These file will take place in Documents>>NetBeansProjects>>[Your Project name]>>dist>>(your project name.jad & your project name.jar)
What is actually J2ME?
J2ME stands for Java 2 Micro Edition, also known as Java ME. J2ME is a stripped down version of Java targeting devices with lower processing capabilities, like mobile phones, pagers.J2ME runs on a highly optimized version of Java Run-time Environment called KVM which comes pre-installed on devices(mobile phone,hand-held devices) supporting J2ME apps.
Basic Concepts on J2ME:
We can divide J2ME framework into three main parts namely Configurations, profiles and optional packages
Configurations: A configuration contains the KVM and important class libraries, It defines the minimum hardware specifications required for your applications. There are two types of configurations CLDC and CDC, CLDC(Connected Limited Device Configuration ) is used for lower level devices while CDC(Connected Device Configuration) aims at relatively high end devices like smartphones.
Profiles: A Profile lies on top of the configuration layer and provides useful set of API-s and important packages. several profiles can target same configuration for example MIDP profile targets CLDC
Optional Packages: As the name suggests this layer contains the optional packages which may be included in J2ME enabled device for e-g, Bluetooth package.
Required Software as well as IDEs:
1.Java Development Kit (JDK), download the latest jdk and install it.
2 Java Wireless Toolkit, download latest version of Sun java Wireless toolkit and install it.
3.Then Install IDE as you wish (e.g. Ecllipse or Netbeans)(I will use Netbeans 7.0 in this post but I prefer Ecllipse)
Let the following instructions be followed:
1.Open Netbeans IDE(e.g.Start menu>>All Programs>>Netbeans>>Netbeans 7.0.exe)
2.Under the File menu select New Project...>>Java ME(Category)>>Mobile Application(Projects)
4.From Run menu Run Main Project.
5.Your display should contain the figure(or like this) given below:
Deployment of your Project as *.jad or *.jar:
To deploy as *.jad or *.jar simply Go to the Run Menu click on Clean and Build Main Project or press Shift+F11.These file will take place in Documents>>NetBeansProjects>>[Your Project name]>>dist>>(your project name.jad & your project name.jar)
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