JAD file

Java ME MIDlets consist of the JAR file that contains the software and the Java Descriptor (JAD) file that contains the information for the Java ME container describing the contents of the source file. MTJ is equipped with a built-in JAD editor, called the Application Descriptor Editor.

Note: Any attempt to send an invalid JAD file to a phone results in a JAR download error.

The following attributes are required from a JAD file:

• MIDlet Jar URL
  This the URL from which the JAR file can be loaded.
• MIDlet name
  The name of the MIDlet suite that identifies the MIDlets to the user.
• MIDlet vendor
  The name of the organization that provides the MIDlet.
• MIDlet version
  This is the version number of the MIDlet suite. The format is <major>.<minor>.<micro> as described in the Java Product Versioning Specification. The Java ME container can use this for install and upgrade purposes, as well as for communication with the user.
• Microedition configuration
  The Java ME Configuration (CLDC version) required by this MIDlet suite.
• Microedition Profile
  The Java ME profile required by this MIDlet suite.

The following attributes are optional:

• MIDlet permissions
  These are the permissions that your MIDlet must have in order to operate correctly. Permissions are usually only provided for signed MIDlets.
• Optional MIDlet permissions
  These are permissions that your MIDlet would like, but can work without.
• MIDlet data size
  This is the minimum number of bytes of persistent data required by the MIDlet. The device may provide additional storage according to its own policy. The default is zero.
• MIDlet description
  This is the description of the MIDlet suite.
• MIDlet icon
  This is the name of a PNG file within the JAR file used to represent the MIDlet suite. It is the icon used by the Java Application Manager to identify the suite. This icon is for the suite as a whole, as distinct from the individual MIDlet icons.
• MIDlet information URL
  This is the possible URL for information further describing the MIDlet suite

These attributes can be edited in the Application Descriptor Editor, which you can access by double-clicking the source JAD file for the desired project in the Package Explorer view.

Java ME projects

Managing applications
Editing the JAD file

Editors