B System Properties

This appendix describes system properties supported by the Oracle Java Micro Edition Embedded Client.

In addition to the standard base Java SE system properties (see Table B-2), Oracle Java Micro Edition Embedded Client supports the additional system properties described in Table B-1.

Table B-1 Oracle Java Micro Edition Embedded Client System Properties

System Property	Default Value	Description
`cdcams.decorations`	`false`	Display native window decorations.
`cdcams.presentation`	No default	Top-level presentation mode class.
`cdcams.repository`	CVMHOME`/repository`	Location of application repository.
`cdcams.verbose`	`false`	Display extra diagnostic information.
`com.sun.midp.implementation`	No default	For dual-stack builds only, a space-separated list of jar files that provide a MIDP implementation.
`com.sun.package.spec.version`	"1.4.2"	Indicates the Java SE equivalent version for core class interfaces. Example: `"1.4.2"`
`file.encoding`	UTF-8	Character encoding for the default locale.
`file.encoding.pkg`	`sun.io`	Package that contains the converters that handle converting between local encodings and Unicode.
`java.ext.dirs`	CVMHOME`/lib`	Specifies one or more directories to search for installed optional packages, each separated by `File.pathSeparatorChar`.
`java.vm.info`	`"mixed mode"`	Indicates if virtual machine was built with just-in-time-compiler support.Values: `"mixed mode"` or `"interpreter loop`"
`microedition.commports`	No default	Comma-delimited list of available communications ports
`microedition.configuration`	`cdc`	Java ME configuration
`microedition.encoding`	`ISO_LATIN_1`	Unicode character encoding
`microedition.hostname`	No default	Host platform
`microedition.locale`	`en-US`	System locale
`microedition.platform`	`j2me`	Java platform
`microedition.profiles`	No default	Java ME profile
`microedition.securerandom.nofallback`	`false`	Disable the mechanism that allows the CDC Java run-time environment to fallback to using `/dev/urandom` if `/dev/random` does not have enough entropy to work properly. See the Oracle Java Micro Edition Embedded Client Customization Guide for more information.
`sun.arch.data.model`	Platform-specific	Platform word size. Examples: `"32"`, `"64"`, `"unknown"`
`sun.boot.class.path`	No default	Default boot class path. In particular, includes jar files from the `lib` directory. It includes jar files for removable modules. Read-only property.
`sun.boot.library.path`	Specified on command line	From here, the VM loads VM libraries (like those related to JVMTI) and any libraries needed for classes on the `-bootclasspath`. Read-only property.
`sun.cpu.endian`	Platform-specific	Endianess of CPU, `"little"` or `"big"`.
`sun.io.unicode.encoding`	Platform-specific, follows `sun.cpu.endian`	For example `"unicodeLittle"`.
`sun.java2d.fontpath`	No default	User-defined path to fonts. Prefix the path value with `"append:"` or `"prepend:"` to specify if it should be searched before or after the JRE-defined font directories. Read-only property.
`sun.misc.product`	"Oracle Java Micro Edition Embedded Client"	`"Oracle Java Micro Edition Embedded Client"`
`user.country`	US	Country (system dependent).
`user.language`	en	Two-letter language code of the default locale (system dependent).
`user.region`	US	Two-letter country code of the default locale (system dependent).
`user.timezone`	UTC	Time zone (system dependent)
`user.variant`	No default	Variant (more specific than country and language).

Table B-2 lists the base Java SE properties defined by the CDC specification and supported by Oracle Java Micro Edition Embedded Client. These properties have no default values.

Table B-2 Base Java SE System Properties in Oracle Java Micro Edition Embedded Client

System Property	Description
`file.separator`	File separator ("/" on UNIX)
`java.class.path`	Java class path
`java.class.version`	Java class format version number
`java.compiler`	Name of JIT compiler to use
`java.ext.dirs`	Path of extension directory or directories
`java.home`	Java installation directory
`java.io.tmpdir`	Default temp file path
`java.library.path`	Path from which to load native libraries. Default is absolute path to `lib` directory.
`java.specification.name`	Java Runtime Environment specification name
`java.specification.vendor`	Java Runtime Environment specification vendor
`java.specification.version`	Java Virtual Machine specification version
java.vendor	Java Runtime Environment vendor
`java.vendor.url`	Java vendor URL
`java.version`	Java Runtime Environment version
`java.vm.name`	Java Virtual Machine implementation name
`java.vm.specification.name`	Java Virtual Machine specification name
`java.vm.specification.vendor`	Java Virtual Machine specification vendor
`java.vm.vendor`	Java Virtual Machine implementation vendor
`java.vm.version`	Java Virtual Machine implementation version
`line.separator`	Line separator ("\n" on UNIX)
`os.arch`	Operating system architecture
`os.name`	Operating system name
`os.version`	Operating system version
`path.separator`	Path separator (":" on UNIX)
`user.dir`	User's current working directory
`user.home`	User's home directory
`user.name`	User's account name