Familja Java dhe J2ME

Pasi projekti kompilohet, NetBeans krijon Suitën MIDlet për projektin e cila gjendet në folderin HelloWorld/dist. Në polder gjenden dy skedarë HelloWorld.jad dhe Helloworld.jar. Skedari i dytë është arkivi që ka të gjithë skedarët që i duhen aplikacionit që të punojë. Rrjedhimisht për të instaluar MIDlet-in në telefon ky arkiv duhet të transferohet fillimisht në telefon. Në disa raste të veçantë duhet të transferohet edhe skedari .jad. Pasi dërgohet skedari në telefon, fillohet instalimi duke hapur këtë skedar.

• Pasi projekti kompilohet, NetBeans krijon Suitën MIDlet për projektin e cila gjendet në folderin HelloWorld/dist. Në polder gjenden dy skedarë HelloWorld.jad dhe Helloworld.jar. Skedari i dytë është arkivi që ka të gjithë skedarët që i duhen aplikacionit që të punojë. Rrjedhimisht për të instaluar MIDlet-in në telefon ky arkiv duhet të transferohet fillimisht në telefon. Në disa raste të veçantë duhet të transferohet edhe skedari .jad. Pasi dërgohet skedari në telefon, fillohet instalimi duke hapur këtë skedar.

The emergence of genuinely portable devices which contain sufficient computing power to support a range of applications, many of which were originally developed for conventional personal computers, is one of the major changes in the world of technology in recent years.

• The emergence of genuinely portable devices which contain sufficient computing power to support a range of applications, many of which were originally developed for conventional personal computers, is one of the major changes in the world of technology in recent years.

• It has accompanied the emergence of very widespread adoption of mobile phones and these technologies are now merging, creating mobile information devices (MIDs) with the ability to connect with each other and with conventional computer networks

• Palm OS

• J2ME

• Other Java environments

• .Net Compact

• Symbian

• Linux

C/C++

• C/C++

• Palm OS
• Symbian
• .NET
• Linux

• Java

• J2ME
• Other Java environments

• C#

• .NET

Screen Size

• Screen Size

• Most Palm Powered handheld screens are only 160x160 pixels, so the amount of information you can display at one time is limited.

• Quick Turnaround Expected

• On a PC, users don’t mind waiting a few seconds while an application loads because they plan to use the application for an extended amount of time. By contrast, the average handheld user uses a handheld application 15 to 20 times per day for much briefer periods of time, usually just a few seconds.

PC Connectivity

• PC Connectivity

• PC connectivity is an integral component of the Palm Powered handheld. The handheld comes with a cradle that connects to a desktop PC and with software for the PC that provides “one button” backup and synchronization of all data on the handheld with the user’s PC.

• Input Methods

• Most users of Palm Powered handhelds don’t have a keyboard or mouse. Users enter data into the handheld using a pen. They can either write characters in the input area or use the keyboard dialog provided on the handheld.

Power

• Power

• Handhelds run on batteries and thus do not have the same processing power as a desktop PC. The handheld is intended as a satellite viewer for corresponding desktop applications. If your application needs to perform a computationally intensive task, you should implement that task in the desktop application instead of the handheld application.

• Memory

• Palm Powered handhelds have limited heap space and storage space. Different versions of the handheld have between 512K and 8MB total of dynamic memory and storage available. The handheld does not have a disk drive or PCMCIA support.

File System

• File System

• Because of the limited storage space, and to make synchronization with the desktop computer more efficient, Palm OS does not use a traditional file system. You store data in memory chunks called records, which are grouped into databases.

• Backward Compatibility

• Different versions of Palm Powered handhelds are available, and each runs a different version of Palm OS. Users are not expected to upgrade their versions of Palm OS as rapidly as they would an operating system on a desktop computer.

• Binary executable files on the device.

• Can access all API’s made available by OS vendor.

• SDK’s are platform-specific.

• Each mobile OS comes with its own unique tools and GUI toolkit.

Separates build environment from target environment.

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