SystemProperty (Molindo Utils 1.1.4 API)

java.lang.Object
- java.lang.Enum<SystemProperty>
- - at.molindo.utils.properties.SystemProperty

All Implemented Interfaces:

Serializable, Comparable<SystemProperty>
```
public enum SystemProperty
extends Enum<SystemProperty>
```
This enum is supposed to be a complete list of available system properties on different JVM and Java versions. And with complete I don't mean the list documented at System.getProperties(). I mean properties that are specific to different verndors, versions and operating stystems.

Use get() or toString() to access the property values or set(String) to update them - but only those that aren't read-only ( isReadOnly()).

If you discover some new properties in your environment, please run the contained main(String[]) method and send the output to me:

You may want to check for updates once in a while: SystemProperty.java and Molindo Techblog: The Final Take On Java System Properties

List of tested JVMs
If your JVM is missing, please send me your output of the included main(String[]) method
- Sun JVM 1.6
  - Ubuntu Hardy
  - Cent OS
  - Mac OS X
  - Windows XP
  - Sun JVM 1.5
    - Ubuntu Hardy
  - Open JDK 6
    - Ubuntu Hardy
  - IBM JVM 1.4.2
    - Windows XP
Author:

Stefan Fussenegger

See Also:
System.getProperties()

Enum Constant Summary

Enum Constants
Enum Constant and Description
`AWT_NATIVE_DOUBLE_BUFFERING` Mac only: true or false
`AWT_TOOLKIT` Mac only: known values: apple.awt.CToolkit
`COM_IBM_CPU_ENDIAN` AIX only: known values: big
`COM_IBM_OTI_CONFIGURATION` AIX only: known values: scar
`COM_IBM_OTI_JCL_BUILD` AIX only: known values: 20081111_1646
`COM_IBM_OTI_VM_BOOTSTRAP_LIBRARY_PATH` AIX only: known values: /prj/was/java/jre/bin
`COM_IBM_OTI_VM_LIBRARY_VERSION` AIX only: known values: 23
`COM_IBM_UTIL_EXTRALIBS_PROPERTIES` AIX only: known values:
`COM_IBM_VM_BITMODE` AIX only: known values: 32
`FILE_ENCODING` Known values: "MacRoman": Mac OS X "Cp1252": Windows XP "UTF-8": CentOS, Ubuntu Hardy/JVM 1.5, Ubuntu Hardy/Open JDK 6 "ISO-8859-1": Ubuntu Hardy/JVM 1.6
`FILE_ENCODING_PKG` This property is available on all
`FILE_SEPARATOR` `System.getProperties()` doc: File separator ("/" on UNIX)
`FTP_NON_PROXY_HOSTS` Mac only: known values: local\|.local\|169.254/16\|.169.254/16
`GNU_CLASSPATH_HOME` GCJ only: known values: /usr
`GNU_CLASSPATH_HOME_URL` GCJ only: known values: file:///usr/lib64
`GNU_CLASSPATH_VERSION` GCJ only: known values: 0.98
`GNU_CLASSPATH_VM_SHORTNAME` GCJ only: known values: libgcj
`GNU_CPU_ENDIAN` GCJ only: known values: little
`GNU_GCJ_PRECOMPILED_DB_PATH` GCJ only: known values: /usr/lib64/gcj-4.4.1/classmap.db
`GNU_GCJ_PROGNAME` GCJ only: known values: SystemProperty
`GNU_GCJ_RUNTIME_ENDORSED_DIRS` GCJ only: known values: /usr/share/java/gcj-endorsed
`GNU_GCJ_USER_REALNAME` GCJ only: known values:
`GNU_JAVA_UTIL_ZONEINFO_DIR` GCJ only: known values: /usr/share/zoneinfo
`GOPHER_PROXY_SET` Mac only: true or false
`GROOVY_HOME` Groovy only: known values: /opt/groovy-1.6.4
`GROOVY_STARTER_CONF` Groovy only: known values: /opt/groovy-1.6.4/conf/groovy-starter.conf
`HTTP_AGENT` GCJ only: known values: gnu-classpath/0.98 (libgcj/4.4.1 20090725 (Red Hat 4.4.1-2))
`HTTP_NON_PROXY_HOSTS` Mac only: known values: local\|.local\|169.254/16\|.169.254/16
`IBM_SIGNALHANDLING_RS` AIX only: known values: false
`IBM_SIGNALHANDLING_SIGCHAIN` AIX only: known values: true
`IBM_SIGNALHANDLING_SIGINT` AIX only: known values: true
`IBM_SYSTEM_ENCODING` AIX only: known values: ISO8859-1
`INVOKEDVIAJAVA` AIX only: known values:
`JAVA_ASSISTIVE` AIX only: known values: ON
`JAVA_AWT_FONTS` AIX only: known values:
`JAVA_AWT_GRAPHICSENV` Known values: "sun.awt.X11GraphicsEnvironment": Ubuntu Hardy "apple.awt.CGraphicsEnvironment": Mac OS X "sun.awt.Win32GraphicsEnvironment": Windows XP
`JAVA_AWT_HEADLESS` turns on headless mode
`JAVA_AWT_PRINTERJOB`
`JAVA_CLASS_PATH`
`JAVA_CLASS_VERSION`
`JAVA_COMPILER`
`JAVA_ENDORSED_DIRS`
`JAVA_EXT_DIRS`
`JAVA_FULLVERSION` GCJ only: known values: GNU libgcj 4.4.1 20090725 (Red Hat 4.4.1-2)
`JAVA_HOME`
`JAVA_IO_TMPDIR` path to temporary directory including trailing file separator
`JAVA_JCL_VERSION` AIX only: known values: 20090506
`JAVA_LIBRARY_PATH`
`JAVA_RUNTIME_NAME`
`JAVA_RUNTIME_VERSION`
`JAVA_SPECIFICATION_NAME`
`JAVA_SPECIFICATION_VENDOR`
`JAVA_SPECIFICATION_VERSION`
`JAVA_UTIL_PREFS__PREFERENCES_FACTORY` AIX only: known values: java.util.prefs.FileSystemPreferencesFactory
`JAVA_VENDOR`
`JAVA_VENDOR_URL`
`JAVA_VENDOR_URL_BUG`
`JAVA_VERSION`
`JAVA_VM_INFO`
`JAVA_VM_NAME` This property may be used to distinguis between a JVM running in defaul (client) and server mode known values: "Java HotSpot(TM) 64-Bit Server VM", "Java HotSpot(TM) Client VM"
`JAVA_VM_SERVER` returns true if VM is running in "Server Mode" (java -server).
`JAVA_VM_SPECIFICATION_NAME`
`JAVA_VM_SPECIFICATION_VENDOR`
`JAVA_VM_SPECIFICATION_VERSION`
`JAVA_VM_VENDOR`
`JAVA_VM_VERSION`
`JXE_CURRENT_ROMIMAGE_VERSION` AIX only: known values: 9
`JXE_LOWEST_ROMIMAGE_VERSION` AIX only: known values: 9
`LINE_SEPARATOR`
`MRJ_VERSION` Mac only: known values: 1060.1.6.0_15-219
`OS_ARCH`
`OS_FAMILY` windows if OS name contains the word "windows" os/2 if OS name contains the word "os/2" netware if OS name contains the word "netware" dos if OS family is not "netware", and its path separator is ";" mac if OS name contains the word "mac" tandem if OS name contains the word "nonstop_kernel" unix if OS family is not "openvms" and not "mac" which names does not end with "X", and its path separator is ":" win9x is OS family is "windows" and OS name contains "95", "98", "me", or "ce" z/os if OS name contains the word "z/os" or "os/390" os/400 if OS name contains the word "os/400" openvms if OS name contains the word "openvms" unknown if none of the above matches
`OS_NAME` see http://lopica.sourceforge.net/os.html for possible values
`OS_VERSION`
`PATH_SEPARATOR`
`PROGRAM_NAME` Groovy only: known values: groovy
`SOCKS_NON_PROXY_HOSTS` Mac only: known values: local\|.local\|169.254/16\|.169.254/16
`SUN_ARCH_DATA_MODEL`
`SUN_AWT_DISABLE_MIXING` TODO doc (hint: for Sun VM on Java 6u14+)
`SUN_AWT_NOERASEBACKGROUND` TODO doc
`SUN_AWT_XEMBEDSERVER` TODO doc
`SUN_BOOT_CLASS_PATH`
`SUN_BOOT_LIBRARY_PATH`
`SUN_CPU_ENDIAN`
`SUN_CPU_ISALIST`
`SUN_DESKTOP` Linux only: known values: gnome
`SUN_IO_UNICODE_ENCODING`
`SUN_JAVA_LAUNCHER`
`SUN_JAVA2D_FONTPATH` AIX only: known values:
`SUN_JNU_ENCODING`
`SUN_MANAGEMENT_COMPILER`
`SUN_OS_PATCH_LEVEL`
`USER_COUNTRY`
`USER_DIR`
`USER_HOME`
`USER_LANGUAGE`
`USER_NAME`
`USER_REGION` GCJ only: known values: US
`USER_TIMEZONE`
`USER_VARIANT` Windows only: known values: "" (empty string)
`USER_ZONEINFO_DIR` Linux only (seen on Sun an OpenJDK JVMs): known values: /usr/share/javazi

Method Summary

Methods
Modifier and Type	Method and Description
`String`	`get()`
`String`	`get(String def)`
`Boolean`	`getBoolean()`
`Boolean`	`getBoolean(Boolean def)`
`String`	`getDefault()` the default return value if property is not set.
`Double`	`getDouble()`
`Double`	`getDouble(Double def)`
`File`	`getFile()`
`File`	`getFile(String def)`
`Float`	`getFloat()`
`Float`	`getFloat(Float def)`
`Integer`	`getInteger()`
`Integer`	`getInteger(Integer def)`
`Long`	`getLong()`
`Long`	`getLong(Long def)`
`String`	`getName()`
`boolean`	`isDerived()`
`boolean`	`isReadOnly()` whether this property should not be modified (i.e.
`static void`	`main(String[] args)` a simple main method to list available system properties.
`String`	`set(String value)`
`String`	`setBoolean(Boolean value)`
`String`	`setDouble(Double value)`
`String`	`setFile(File value)`
`String`	`setFloat(Float value)`
`String`	`setInteger(Integer value)`
`String`	`setLong(Long value)`
`String`	`toDebugString()`
`static String`	`toEnumName(String property)` generate a new enum name from a system property
`String`	`toString()`
`String`	`unset()`
`static SystemProperty`	`valueOf(String name)` Returns the enum constant of this type with the specified name.
`static SystemProperty[]`	`values()` Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Enum Constant Detail
  - FILE_ENCODING
```
public static final SystemProperty FILE_ENCODING
```
    Known values:
    - "MacRoman": Mac OS X
    - "Cp1252": Windows XP
    - "UTF-8": CentOS, Ubuntu Hardy/JVM 1.5, Ubuntu Hardy/Open JDK 6
    - "ISO-8859-1": Ubuntu Hardy/JVM 1.6
    Note: This property is not part of System.getProperties() doc.
  - FILE_ENCODING_PKG
```
public static final SystemProperty FILE_ENCODING_PKG
```
    This property is available on all
    Known values:
    - "sun.io"
    Note: This property is not part of System.getProperties() doc.
  - FILE_SEPARATOR
```
public static final SystemProperty FILE_SEPARATOR
```
    System.getProperties() doc: File separator ("/" on UNIX)
    
    Known values:
    - "\" (Windows)
    - "/" (Mac OS X, Linux)
    - "\\" (Windows, IBM JVM)
  - JAVA_AWT_GRAPHICSENV
```
public static final SystemProperty JAVA_AWT_GRAPHICSENV
```
    Known values:
    - "sun.awt.X11GraphicsEnvironment": Ubuntu Hardy
    - "apple.awt.CGraphicsEnvironment": Mac OS X
    - "sun.awt.Win32GraphicsEnvironment": Windows XP
    Note: This property is not part of System.getProperties() doc.
  - JAVA_AWT_PRINTERJOB
```
public static final SystemProperty JAVA_AWT_PRINTERJOB
```
  - JAVA_CLASS_PATH
```
public static final SystemProperty JAVA_CLASS_PATH
```
  - JAVA_CLASS_VERSION
```
public static final SystemProperty JAVA_CLASS_VERSION
```
  - JAVA_COMPILER
```
public static final SystemProperty JAVA_COMPILER
```
  - JAVA_ENDORSED_DIRS
```
public static final SystemProperty JAVA_ENDORSED_DIRS
```
  - JAVA_EXT_DIRS
```
public static final SystemProperty JAVA_EXT_DIRS
```
  - JAVA_HOME
```
public static final SystemProperty JAVA_HOME
```
  - JAVA_IO_TMPDIR
```
public static final SystemProperty JAVA_IO_TMPDIR
```
    path to temporary directory including trailing file separator
  - JAVA_LIBRARY_PATH
```
public static final SystemProperty JAVA_LIBRARY_PATH
```
  - JAVA_RUNTIME_NAME
```
public static final SystemProperty JAVA_RUNTIME_NAME
```
  - JAVA_RUNTIME_VERSION
```
public static final SystemProperty JAVA_RUNTIME_VERSION
```
  - JAVA_SPECIFICATION_NAME
```
public static final SystemProperty JAVA_SPECIFICATION_NAME
```
  - JAVA_SPECIFICATION_VENDOR
```
public static final SystemProperty JAVA_SPECIFICATION_VENDOR
```
  - JAVA_SPECIFICATION_VERSION
```
public static final SystemProperty JAVA_SPECIFICATION_VERSION
```
  - JAVA_VERSION
```
public static final SystemProperty JAVA_VERSION
```
  - JAVA_VENDOR
```
public static final SystemProperty JAVA_VENDOR
```
  - JAVA_VENDOR_URL
```
public static final SystemProperty JAVA_VENDOR_URL
```
  - JAVA_VENDOR_URL_BUG
```
public static final SystemProperty JAVA_VENDOR_URL_BUG
```
  - JAVA_VM_INFO
```
public static final SystemProperty JAVA_VM_INFO
```
  - JAVA_VM_NAME
```
public static final SystemProperty JAVA_VM_NAME
```
    This property may be used to distinguis between a JVM running in defaul (client) and server mode known values: "Java HotSpot(TM) 64-Bit Server VM", "Java HotSpot(TM) Client VM"
  - JAVA_VM_SPECIFICATION_NAME
```
public static final SystemProperty JAVA_VM_SPECIFICATION_NAME
```
  - JAVA_VM_SPECIFICATION_VENDOR
```
public static final SystemProperty JAVA_VM_SPECIFICATION_VENDOR
```
  - JAVA_VM_SPECIFICATION_VERSION
```
public static final SystemProperty JAVA_VM_SPECIFICATION_VERSION
```
  - JAVA_VM_VERSION
```
public static final SystemProperty JAVA_VM_VERSION
```
  - JAVA_VM_VENDOR
```
public static final SystemProperty JAVA_VM_VENDOR
```
  - LINE_SEPARATOR
```
public static final SystemProperty LINE_SEPARATOR
```
  - OS_NAME
```
public static final SystemProperty OS_NAME
```
    see http://lopica.sourceforge.net/os.html for possible values
  - OS_ARCH
```
public static final SystemProperty OS_ARCH
```
  - OS_VERSION
```
public static final SystemProperty OS_VERSION
```
  - PATH_SEPARATOR
```
public static final SystemProperty PATH_SEPARATOR
```
  - SUN_ARCH_DATA_MODEL
```
public static final SystemProperty SUN_ARCH_DATA_MODEL
```
  - SUN_BOOT_CLASS_PATH
```
public static final SystemProperty SUN_BOOT_CLASS_PATH
```
  - SUN_BOOT_LIBRARY_PATH
```
public static final SystemProperty SUN_BOOT_LIBRARY_PATH
```
  - SUN_CPU_ENDIAN
```
public static final SystemProperty SUN_CPU_ENDIAN
```
  - SUN_CPU_ISALIST
```
public static final SystemProperty SUN_CPU_ISALIST
```
  - SUN_IO_UNICODE_ENCODING
```
public static final SystemProperty SUN_IO_UNICODE_ENCODING
```
  - SUN_JAVA_LAUNCHER
```
public static final SystemProperty SUN_JAVA_LAUNCHER
```
  - SUN_JNU_ENCODING
```
public static final SystemProperty SUN_JNU_ENCODING
```
  - SUN_MANAGEMENT_COMPILER
```
public static final SystemProperty SUN_MANAGEMENT_COMPILER
```
  - SUN_OS_PATCH_LEVEL
```
public static final SystemProperty SUN_OS_PATCH_LEVEL
```
  - USER_COUNTRY
```
public static final SystemProperty USER_COUNTRY
```
  - USER_DIR
```
public static final SystemProperty USER_DIR
```
  - USER_HOME
```
public static final SystemProperty USER_HOME
```
  - USER_LANGUAGE
```
public static final SystemProperty USER_LANGUAGE
```
  - USER_NAME
```
public static final SystemProperty USER_NAME
```
  - USER_TIMEZONE
```
public static final SystemProperty USER_TIMEZONE
```
  - USER_VARIANT
```
public static final SystemProperty USER_VARIANT
```
    Windows only: known values: "" (empty string)
  - SUN_DESKTOP
```
public static final SystemProperty SUN_DESKTOP
```
    Linux only: known values: gnome
  - USER_ZONEINFO_DIR
```
public static final SystemProperty USER_ZONEINFO_DIR
```
    Linux only (seen on Sun an OpenJDK JVMs): known values: /usr/share/javazi
  - AWT_NATIVE_DOUBLE_BUFFERING
```
public static final SystemProperty AWT_NATIVE_DOUBLE_BUFFERING
```
    Mac only: true or false
  - AWT_TOOLKIT
```
public static final SystemProperty AWT_TOOLKIT
```
    Mac only: known values: apple.awt.CToolkit
  - FTP_NON_PROXY_HOSTS
```
public static final SystemProperty FTP_NON_PROXY_HOSTS
```
    Mac only: known values: local|*.local|169.254/16|*.169.254/16
  - GOPHER_PROXY_SET
```
public static final SystemProperty GOPHER_PROXY_SET
```
    Mac only: true or false
  - HTTP_NON_PROXY_HOSTS
```
public static final SystemProperty HTTP_NON_PROXY_HOSTS
```
    Mac only: known values: local|*.local|169.254/16|*.169.254/16
  - MRJ_VERSION
```
public static final SystemProperty MRJ_VERSION
```
    Mac only: known values: 1060.1.6.0_15-219
  - SOCKS_NON_PROXY_HOSTS
```
public static final SystemProperty SOCKS_NON_PROXY_HOSTS
```
    Mac only: known values: local|*.local|169.254/16|*.169.254/16
  - GNU_CLASSPATH_HOME
```
public static final SystemProperty GNU_CLASSPATH_HOME
```
    GCJ only: known values: /usr
  - GNU_CLASSPATH_HOME_URL
```
public static final SystemProperty GNU_CLASSPATH_HOME_URL
```
    GCJ only: known values: file:///usr/lib64
  - GNU_CLASSPATH_VERSION
```
public static final SystemProperty GNU_CLASSPATH_VERSION
```
    GCJ only: known values: 0.98
  - GNU_CLASSPATH_VM_SHORTNAME
```
public static final SystemProperty GNU_CLASSPATH_VM_SHORTNAME
```
    GCJ only: known values: libgcj
  - GNU_CPU_ENDIAN
```
public static final SystemProperty GNU_CPU_ENDIAN
```
    GCJ only: known values: little
  - GNU_GCJ_PRECOMPILED_DB_PATH
```
public static final SystemProperty GNU_GCJ_PRECOMPILED_DB_PATH
```
    GCJ only: known values: /usr/lib64/gcj-4.4.1/classmap.db
  - GNU_GCJ_PROGNAME
```
public static final SystemProperty GNU_GCJ_PROGNAME
```
    GCJ only: known values: SystemProperty
  - GNU_GCJ_RUNTIME_ENDORSED_DIRS
```
public static final SystemProperty GNU_GCJ_RUNTIME_ENDORSED_DIRS
```
    GCJ only: known values: /usr/share/java/gcj-endorsed
  - GNU_GCJ_USER_REALNAME
```
public static final SystemProperty GNU_GCJ_USER_REALNAME
```
    GCJ only: known values:
  - GNU_JAVA_UTIL_ZONEINFO_DIR
```
public static final SystemProperty GNU_JAVA_UTIL_ZONEINFO_DIR
```
    GCJ only: known values: /usr/share/zoneinfo
  - HTTP_AGENT
```
public static final SystemProperty HTTP_AGENT
```
    GCJ only: known values: gnu-classpath/0.98 (libgcj/4.4.1 20090725 (Red Hat 4.4.1-2))
  - JAVA_FULLVERSION
```
public static final SystemProperty JAVA_FULLVERSION
```
    GCJ only: known values: GNU libgcj 4.4.1 20090725 (Red Hat 4.4.1-2)
  - USER_REGION
```
public static final SystemProperty USER_REGION
```
    GCJ only: known values: US
  - COM_IBM_CPU_ENDIAN
```
public static final SystemProperty COM_IBM_CPU_ENDIAN
```
    AIX only: known values: big
  - COM_IBM_OTI_CONFIGURATION
```
public static final SystemProperty COM_IBM_OTI_CONFIGURATION
```
    AIX only: known values: scar
  - COM_IBM_OTI_JCL_BUILD
```
public static final SystemProperty COM_IBM_OTI_JCL_BUILD
```
    AIX only: known values: 20081111_1646
  - COM_IBM_OTI_VM_BOOTSTRAP_LIBRARY_PATH
```
public static final SystemProperty COM_IBM_OTI_VM_BOOTSTRAP_LIBRARY_PATH
```
    AIX only: known values: /prj/was/java/jre/bin
  - COM_IBM_OTI_VM_LIBRARY_VERSION
```
public static final SystemProperty COM_IBM_OTI_VM_LIBRARY_VERSION
```
    AIX only: known values: 23
  - COM_IBM_UTIL_EXTRALIBS_PROPERTIES
```
public static final SystemProperty COM_IBM_UTIL_EXTRALIBS_PROPERTIES
```
    AIX only: known values:
  - COM_IBM_VM_BITMODE
```
public static final SystemProperty COM_IBM_VM_BITMODE
```
    AIX only: known values: 32
  - IBM_SIGNALHANDLING_RS
```
public static final SystemProperty IBM_SIGNALHANDLING_RS
```
    AIX only: known values: false
  - IBM_SIGNALHANDLING_SIGCHAIN
```
public static final SystemProperty IBM_SIGNALHANDLING_SIGCHAIN
```
    AIX only: known values: true
  - IBM_SIGNALHANDLING_SIGINT
```
public static final SystemProperty IBM_SIGNALHANDLING_SIGINT
```
    AIX only: known values: true
  - IBM_SYSTEM_ENCODING
```
public static final SystemProperty IBM_SYSTEM_ENCODING
```
    AIX only: known values: ISO8859-1
  - INVOKEDVIAJAVA
```
public static final SystemProperty INVOKEDVIAJAVA
```
    AIX only: known values:
  - JAVA_ASSISTIVE
```
public static final SystemProperty JAVA_ASSISTIVE
```
    AIX only: known values: ON
  - JAVA_AWT_FONTS
```
public static final SystemProperty JAVA_AWT_FONTS
```
    AIX only: known values:
  - JAVA_JCL_VERSION
```
public static final SystemProperty JAVA_JCL_VERSION
```
    AIX only: known values: 20090506
  - JAVA_UTIL_PREFS__PREFERENCES_FACTORY
```
public static final SystemProperty JAVA_UTIL_PREFS__PREFERENCES_FACTORY
```
    AIX only: known values: java.util.prefs.FileSystemPreferencesFactory
  - JXE_CURRENT_ROMIMAGE_VERSION
```
public static final SystemProperty JXE_CURRENT_ROMIMAGE_VERSION
```
    AIX only: known values: 9
  - JXE_LOWEST_ROMIMAGE_VERSION
```
public static final SystemProperty JXE_LOWEST_ROMIMAGE_VERSION
```
    AIX only: known values: 9
  - SUN_JAVA2D_FONTPATH
```
public static final SystemProperty SUN_JAVA2D_FONTPATH
```
    AIX only: known values:
  - PROGRAM_NAME
```
public static final SystemProperty PROGRAM_NAME
```
    Groovy only: known values: groovy
  - GROOVY_HOME
```
public static final SystemProperty GROOVY_HOME
```
    Groovy only: known values: /opt/groovy-1.6.4
  - GROOVY_STARTER_CONF
```
public static final SystemProperty GROOVY_STARTER_CONF
```
    Groovy only: known values: /opt/groovy-1.6.4/conf/groovy-starter.conf
  - JAVA_AWT_HEADLESS
```
public static final SystemProperty JAVA_AWT_HEADLESS
```
    turns on headless mode
  - SUN_AWT_DISABLE_MIXING
```
public static final SystemProperty SUN_AWT_DISABLE_MIXING
```
    TODO doc (hint: for Sun VM on Java 6u14+)
  - SUN_AWT_NOERASEBACKGROUND
```
public static final SystemProperty SUN_AWT_NOERASEBACKGROUND
```
    TODO doc
  - SUN_AWT_XEMBEDSERVER
```
public static final SystemProperty SUN_AWT_XEMBEDSERVER
```
    TODO doc
  - OS_FAMILY
```
public static final SystemProperty OS_FAMILY
```
    - windows if OS name contains the word "windows"
    - os/2 if OS name contains the word "os/2"
    - netware if OS name contains the word "netware"
    - dos if OS family is not "netware", and its path separator is ";"
    - mac if OS name contains the word "mac"
    - tandem if OS name contains the word "nonstop_kernel"
    - unix if OS family is not "openvms" and not "mac" which names does not end with "X", and its path separator is ":"
    - win9x is OS family is "windows" and OS name contains "95", "98", "me", or "ce"
    - z/os if OS name contains the word "z/os" or "os/390"
    - os/400 if OS name contains the word "os/400"
    - openvms if OS name contains the word "openvms"
    - unknown if none of the above matches
  - JAVA_VM_SERVER
```
public static final SystemProperty JAVA_VM_SERVER
```
    returns true if VM is running in "Server Mode" (java -server). This is only true if java.vm.name starts with "Java HotSpot(TM)" and contains "Server". null is returned if java.vm.name is null (which should never be the case).
    
    Stackoverflow: How to make sure I'm using the "server" JVM?
- Method Detail
  - values
```
public static SystemProperty[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
```
for (SystemProperty c : SystemProperty.values())
    System.out.println(c);
```
    Returns:
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static SystemProperty valueOf(String name)
```
    Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
    
    Parameters:
    name - the name of the enum constant to be returned.
    
    Returns:
    the enum constant with the specified name
    
    Throws:
    
    IllegalArgumentException - if this enum type has no constant with the specified name
    
    NullPointerException - if the argument is null
  - get
```
public String get()
```
    Returns:
    the string value of the system property, or null if there is no property with that key and getDefault() is null too
    See Also:
    System.getProperty(String), AccessController.doPrivileged(PrivilegedAction)
  - get
```
public String get(String def)
```
    Returns:
    the string value of the system property, or def if there is no property with that key. (getDefault() is ignored)
    See Also:
    System.getProperty(String), AccessController.doPrivileged(PrivilegedAction)
  - getBoolean
```
public Boolean getBoolean()
```
    Returns:
    returns parsed boolean or null if get() returned null
    See Also:
    get(), Boolean.parseBoolean(String)
  - getBoolean
```
public Boolean getBoolean(Boolean def)
```
    Returns:
    returns parsed boolean or null if get(String) returned null
    See Also:
    get(), Integer.parseInt(String)
  - getInteger
```
public Integer getInteger()
                   throws NumberFormatException
```
    Returns:
    returns parsed integer or null if get() returned null
    
    Throws:
    
    NumberFormatException
    See Also:
    get(), Integer.parseInt(String)
  - getInteger
```
public Integer getInteger(Integer def)
                   throws NumberFormatException
```
    Returns:
    returns parsed integer or null if get(String) returned null
    
    Throws:
    
    NumberFormatException
    See Also:
    get(), Integer.parseInt(String)
  - getLong
```
public Long getLong()
             throws NumberFormatException
```
    Returns:
    returns parsed Long or null if get() returned null
    
    Throws:
    
    NumberFormatException
    See Also:
    get(), Long.parseLong(String)
  - getLong
```
public Long getLong(Long def)
             throws NumberFormatException
```
    Returns:
    returns parsed Long or null if get(String) returned null
    
    Throws:
    
    NumberFormatException
    See Also:
    get(), Long.parseLong(String)
  - getFloat
```
public Float getFloat()
               throws NumberFormatException
```
    Returns:
    returns parsed Float or null if get() returned null
    
    Throws:
    
    NumberFormatException
    See Also:
    get(), Float.parseFloat(String)
  - getFloat
```
public Float getFloat(Float def)
               throws NumberFormatException
```
    Returns:
    returns parsed Float or null if get(String) returned null
    
    Throws:
    
    NumberFormatException
    See Also:
    get(), Float.parseFloat(String)
  - getDouble
```
public Double getDouble()
                 throws NumberFormatException
```
    Returns:
    returns parsed Double or null if get() returned null
    
    Throws:
    
    NumberFormatException
    See Also:
    get(), Double.parseDouble(String)
  - getDouble
```
public Double getDouble(Double def)
                 throws NumberFormatException
```
    Returns:
    returns parsed Double or null if get(String) returned null
    
    Throws:
    
    NumberFormatException
    See Also:
    get(), Double.parseDouble(String)
  - getFile
```
public File getFile()
```
    Returns:
    a file constructed with the returned value of get() or null
    See Also:
    get()
  - getFile
```
public File getFile(String def)
```
    Parameters:
    def - default value
    
    Returns:
    a file constructed with the returned value of get(String) or null
    See Also:
    get()
  - set
```
public String set(String value)
```
    Parameters:
    value - the new value
    
    Returns:
    the previous value of this system property or null if it didn't have one
    
    Throws:
    
    UnsupportedOperationException - if this property is read-only
    See Also:
    System.setProperty(String, String), AccessController.doPrivileged(PrivilegedAction), isReadOnly()
  - setBoolean
```
public String setBoolean(Boolean value)
                  throws NumberFormatException
```
    Throws:
    
    NumberFormatException
  - setInteger
```
public String setInteger(Integer value)
                  throws NumberFormatException
```
    Throws:
    
    NumberFormatException
  - setLong
```
public String setLong(Long value)
               throws NumberFormatException
```
    Throws:
    
    NumberFormatException
  - setDouble
```
public String setDouble(Double value)
                 throws NumberFormatException
```
    Throws:
    
    NumberFormatException
  - setFloat
```
public String setFloat(Float value)
                throws NumberFormatException
```
    Throws:
    
    NumberFormatException
  - setFile
```
public String setFile(File value)
               throws IOException
```
    Throws:
    
    IOException
  - unset
```
public String unset()
```
  - getName
```
public String getName()
```
    Returns:
    name of this property
  - isReadOnly
```
public boolean isReadOnly()
```
    whether this property should not be modified (i.e. "read-only"). Note that it is possible to use System.setProperty(String, String) directly. It's use is discouraged though (as it might not have the desired effect)
    
    Returns:
    true if this property should not be modified
  - isDerived
```
public boolean isDerived()
```
    Returns:
    true if this is property doesn't exist but is derived from another property (e.g. OS_FAMILY which is derived by other properties, mainly OS_NAME)
  - getDefault
```
public String getDefault()
```
    the default return value if property is not set. for most properties this is null. For example, the default for java.awt.headless is "false"
    
    Returns:
    the default value for this property or null if not applicable
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Enum<SystemProperty>
    
    Returns:
    property value (same as get()
    See Also:
    get()
  - toDebugString
```
public String toDebugString()
```
    Returns:
    a string representation of this object (e.g. "OS_NAME: os.name=Linux (read-only)")
  - main
```
public static void main(String[] args)
```
    a simple main method to list available system properties. additionally, it generates Java code for yet unknown properties. If you find some of them, please let us know: http://techblog.molindo.at/2009/11/java-system-properties.html
    
    Parameters:
    args - arguments are ignored
  - toEnumName
```
public static String toEnumName(String property)
```
    generate a new enum name from a system property
    
    Parameters:
    property - property name (e.g. "os.name")
    
    Returns:
    the resulting enum name (e.g. "OS_NAME")

Enum SystemProperty

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Enum

Methods inherited from class java.lang.Object

Enum Constant Detail

FILE_ENCODING

FILE_ENCODING_PKG

FILE_SEPARATOR

JAVA_AWT_GRAPHICSENV

JAVA_AWT_PRINTERJOB

JAVA_CLASS_PATH

JAVA_CLASS_VERSION

JAVA_COMPILER

JAVA_ENDORSED_DIRS

JAVA_EXT_DIRS

JAVA_HOME

JAVA_IO_TMPDIR

JAVA_LIBRARY_PATH

JAVA_RUNTIME_NAME

JAVA_RUNTIME_VERSION

JAVA_SPECIFICATION_NAME

JAVA_SPECIFICATION_VENDOR

JAVA_SPECIFICATION_VERSION

JAVA_VERSION

JAVA_VENDOR

JAVA_VENDOR_URL

JAVA_VENDOR_URL_BUG

JAVA_VM_INFO

JAVA_VM_NAME

JAVA_VM_SPECIFICATION_NAME

JAVA_VM_SPECIFICATION_VENDOR

JAVA_VM_SPECIFICATION_VERSION

JAVA_VM_VERSION

JAVA_VM_VENDOR

LINE_SEPARATOR

OS_NAME

OS_ARCH

OS_VERSION

PATH_SEPARATOR

SUN_ARCH_DATA_MODEL

SUN_BOOT_CLASS_PATH

SUN_BOOT_LIBRARY_PATH

SUN_CPU_ENDIAN

SUN_CPU_ISALIST

SUN_IO_UNICODE_ENCODING

SUN_JAVA_LAUNCHER

SUN_JNU_ENCODING

SUN_MANAGEMENT_COMPILER

SUN_OS_PATCH_LEVEL

USER_COUNTRY

USER_DIR

USER_HOME

USER_LANGUAGE

USER_NAME

USER_TIMEZONE

USER_VARIANT

SUN_DESKTOP

USER_ZONEINFO_DIR

AWT_NATIVE_DOUBLE_BUFFERING

AWT_TOOLKIT

FTP_NON_PROXY_HOSTS

GOPHER_PROXY_SET

HTTP_NON_PROXY_HOSTS

MRJ_VERSION

SOCKS_NON_PROXY_HOSTS

GNU_CLASSPATH_HOME

GNU_CLASSPATH_HOME_URL

GNU_CLASSPATH_VERSION

GNU_CLASSPATH_VM_SHORTNAME

GNU_CPU_ENDIAN

GNU_GCJ_PRECOMPILED_DB_PATH

GNU_GCJ_PROGNAME

GNU_GCJ_RUNTIME_ENDORSED_DIRS

GNU_GCJ_USER_REALNAME

GNU_JAVA_UTIL_ZONEINFO_DIR

HTTP_AGENT

JAVA_FULLVERSION

USER_REGION

COM_IBM_CPU_ENDIAN