DoJa profile is aJava application environment specification forDoCoMo'si-modemobile phone.

DoJa is based on theJava MECLDC API that is defined in theJava Community Process (JCP). DoJa is a profile defined byNTT DoCoMo to provide communications and other input-output processing, user interface (GUI) and other application features/functions unique toi-mode, and extension libraries defined by individual phone terminal makers to add original functions. However, in contrast with otherJava ME profiles likeMobile Information Device Profile (MIDP) orInformation Module Profile (IMP), DoJa is not defined as aJava Specification Request (JSR), hence it is often called a "proprietary" Java ME profile.

DoJa allows i-mode to offer more dynamic and interactive content than conventional HTML-based i-mode content. Java for i-mode consists of support for a version of CLDC and a version of the DoJa profile. CLDC support can be 1.0 or 1.1 depending on the handset. The DoJa profile was originally created for the local Japanese market with version 1.0 and version 2.0 more or less corresponding to MIDP 1.0 and MIDP 2.0. For the market outside Japan a new API has been created, which is referred to as the Overseas Edition. CurrentlyDoJa 1.5oe andDoJa 2.5oe are implemented on handsets sold in Europe. (The first DoJa handset with DoJa1.5oe is N341i launched in 2003 fromNEC, and the first DoJa 2.5 handset is M430i launched in the beginning of 2005 fromMitsubishi.) The DoJa Profile provides for use with i-mode extension library (Java for i-mode profiles), including user interfaces and HTTP communications.

"Star"^[1] is the successor to DoJa, rather than being part of it, with access to modern hardware and services such as the accelerometer.

• NTT Docomo i-appli Development Page
• DoJa developers mailing list archive

• Java device platform

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