System Properties
MIDP inherits the system property mechanism from CLDC (see Section
5.2.10, "Property Support"). In addition to the properties provided by the
CLDC, the MIDP Specification defines the following additional
properties that can be retrieved by calling the method
java.lang.System.getProperty (see Table 20.1).
The microedition.locale property is a String
that consists of the language, country code, and variant separated by
"-" (Unicode U+002D), for example, "fr-FR" or
"en-US". Note that this is different from the J2SE definition for
Locale printed strings where fields are separated by "_" (Unicode U+005F).
Table 20.1. System properties defined by
MIDP
|
microedition.locale |
The current locale of the device; may be
null. |
|
microedition.profiles |
A blank (Unicode U+0020) separated list of the J2ME profiles
that this device supports. For MIDP 2.0 devices, this property MUST contain at
least "MIDP-2.0". |
|
microedition.commports
|
A comma separated list of ports that can be combined with a
"comm:" prefix as the URL string to be used to open a serial port
connection (see Section 15.8,
"CommConnection"). |
|
microedition.hostname |
The local hostname (if
available). |
This locale string can be used by a MIDlet to determine the
locale for which the underlying device is configured.
The microedition.profiles property can be used by a
MIDlet to ensure that the underlying platform supports the necessary profile(s)
and profile version(s) that the application requires.
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