Package edu.internet2.middleware.grouperClientExt.org.apache.commons.lang3

Class SystemUtils

java.lang.Object
edu.internet2.middleware.grouperClientExt.org.apache.commons.lang3.SystemUtils
public class SystemUtils extends Object

Helpers for java.lang.System.

If a system property cannot be read due to security restrictions, the corresponding field in this class will be set to null and a message will be written to System.err.

#ThreadSafe#

Since:
1.0

  • Field Details

    • AWT_TOOLKIT

      public static final String AWT_TOOLKIT

      The awt.toolkit System Property.

      Holds a class name, on Windows XP this is sun.awt.windows.WToolkit.

      On platforms without a GUI, this value is null.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      2.1

    • FILE_ENCODING

      public static final String FILE_ENCODING

      The file.encoding System Property.

      File encoding, such as Cp1252.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      2.0, Java 1.2

    • FILE_SEPARATOR

      @Deprecated public static final String FILE_SEPARATOR
      Deprecated.
      Use File.separator, since it is guaranteed to be a string containing a single character and it does not require a privilege check.

      The file.separator System Property. The file separator is:

      • "/" on UNIX
      • "\" on Windows.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • JAVA_AWT_FONTS

      public static final String JAVA_AWT_FONTS

      The java.awt.fonts System Property.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      2.1

    • JAVA_AWT_GRAPHICSENV

      public static final String JAVA_AWT_GRAPHICSENV

      The java.awt.graphicsenv System Property.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      2.1

    • JAVA_AWT_HEADLESS

      public static final String JAVA_AWT_HEADLESS

      The java.awt.headless System Property. The value of this property is the String "true" or "false".

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      2.1, Java 1.4
      See Also:

    • JAVA_AWT_PRINTERJOB

      public static final String JAVA_AWT_PRINTERJOB

      The java.awt.printerjob System Property.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      2.1

    • JAVA_CLASS_PATH

      public static final String JAVA_CLASS_PATH

      The java.class.path System Property. Java class path.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • JAVA_CLASS_VERSION

      public static final String JAVA_CLASS_VERSION

      The java.class.version System Property. Java class format version number.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • JAVA_COMPILER

      public static final String JAVA_COMPILER

      The java.compiler System Property. Name of JIT compiler to use. First in JDK version 1.2. Not used in Sun JDKs after 1.2.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.2. Not used in Sun versions after 1.2.

    • JAVA_ENDORSED_DIRS

      public static final String JAVA_ENDORSED_DIRS

      The java.endorsed.dirs System Property. Path of endorsed directory or directories.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.4

    • JAVA_EXT_DIRS

      public static final String JAVA_EXT_DIRS

      The java.ext.dirs System Property. Path of extension directory or directories.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.3

    • JAVA_HOME

      public static final String JAVA_HOME

      The java.home System Property. Java installation directory.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • JAVA_IO_TMPDIR

      public static final String JAVA_IO_TMPDIR

      The java.io.tmpdir System Property. Default temp file path.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.2

    • JAVA_LIBRARY_PATH

      public static final String JAVA_LIBRARY_PATH

      The java.library.path System Property. List of paths to search when loading libraries.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.2

    • JAVA_RUNTIME_NAME

      public static final String JAVA_RUNTIME_NAME

      The java.runtime.name System Property. Java Runtime Environment name.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      2.0, Java 1.3

    • JAVA_RUNTIME_VERSION

      public static final String JAVA_RUNTIME_VERSION

      The java.runtime.version System Property. Java Runtime Environment version.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      2.0, Java 1.3

    • JAVA_SPECIFICATION_NAME

      public static final String JAVA_SPECIFICATION_NAME

      The java.specification.name System Property. Java Runtime Environment specification name.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.2

    • JAVA_SPECIFICATION_VENDOR

      public static final String JAVA_SPECIFICATION_VENDOR

      The java.specification.vendor System Property. Java Runtime Environment specification vendor.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.2

    • JAVA_SPECIFICATION_VERSION

      public static final String JAVA_SPECIFICATION_VERSION

      The java.specification.version System Property. Java Runtime Environment specification version.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.3

    • JAVA_UTIL_PREFS_PREFERENCES_FACTORY

      public static final String JAVA_UTIL_PREFS_PREFERENCES_FACTORY

      The java.util.prefs.PreferencesFactory System Property. A class name.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      2.1, Java 1.4

    • JAVA_VENDOR

      public static final String JAVA_VENDOR

      The java.vendor System Property. Java vendor-specific string.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • JAVA_VENDOR_URL

      public static final String JAVA_VENDOR_URL

      The java.vendor.url System Property. Java vendor URL.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • JAVA_VERSION

      public static final String JAVA_VERSION

      The java.version System Property. Java version number.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • JAVA_VM_INFO

      public static final String JAVA_VM_INFO

      The java.vm.info System Property. Java Virtual Machine implementation info.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      2.0, Java 1.2

    • JAVA_VM_NAME

      public static final String JAVA_VM_NAME

      The java.vm.name System Property. Java Virtual Machine implementation name.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.2

    • JAVA_VM_SPECIFICATION_NAME

      public static final String JAVA_VM_SPECIFICATION_NAME

      The java.vm.specification.name System Property. Java Virtual Machine specification name.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.2

    • JAVA_VM_SPECIFICATION_VENDOR

      public static final String JAVA_VM_SPECIFICATION_VENDOR

      The java.vm.specification.vendor System Property. Java Virtual Machine specification vendor.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.2

    • JAVA_VM_SPECIFICATION_VERSION

      public static final String JAVA_VM_SPECIFICATION_VERSION

      The java.vm.specification.version System Property. Java Virtual Machine specification version.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.2

    • JAVA_VM_VENDOR

      public static final String JAVA_VM_VENDOR

      The java.vm.vendor System Property. Java Virtual Machine implementation vendor.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.2

    • JAVA_VM_VERSION

      public static final String JAVA_VM_VERSION

      The java.vm.version System Property. Java Virtual Machine implementation version.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.2

    • LINE_SEPARATOR

      @Deprecated public static final String LINE_SEPARATOR
      Deprecated.
      Use System.lineSeparator() instead, since it does not require a privilege check.

      The line.separator System Property. Line separator ("\n" on UNIX).

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • OS_ARCH

      public static final String OS_ARCH

      The os.arch System Property. Operating system architecture.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • OS_NAME

      public static final String OS_NAME

      The os.name System Property. Operating system name.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • OS_VERSION

      public static final String OS_VERSION

      The os.version System Property. Operating system version.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • PATH_SEPARATOR

      @Deprecated public static final String PATH_SEPARATOR
      Deprecated.
      Use File.pathSeparator, since it is guaranteed to be a string containing a single character and it does not require a privilege check.

      The path.separator System Property. Path separator (":" on UNIX).

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • USER_COUNTRY

      public static final String USER_COUNTRY

      The user.country or user.region System Property. User's country code, such as GB. First in Java version 1.2 as user.region. Renamed to user.country in 1.4

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      2.0, Java 1.2

    • USER_DIR

      public static final String USER_DIR

      The user.dir System Property. User's current working directory.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • USER_HOME

      public static final String USER_HOME

      The user.home System Property. User's home directory.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • USER_LANGUAGE

      public static final String USER_LANGUAGE

      The user.language System Property. User's language code, such as "en".

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      2.0, Java 1.2

    • USER_NAME

      public static final String USER_NAME

      The user.name System Property. User's account name.

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      Java 1.1

    • USER_TIMEZONE

      public static final String USER_TIMEZONE

      The user.timezone System Property. For example: "America/Los_Angeles".

      Defaults to null if the runtime does not have security access to read this property or the property does not exist.

      This value is initialized when the class is loaded. If System.setProperty(String,String) or System.setProperties(java.util.Properties) is called after this class is loaded, the value will be out of sync with that System property.

      Since:
      2.1

    • IS_JAVA_1_1

      public static final boolean IS_JAVA_1_1

      Is true if this is Java version 1.1 (also 1.1.x versions).

      The field will return false if JAVA_VERSION is null.

    • IS_JAVA_1_2

      public static final boolean IS_JAVA_1_2

      Is true if this is Java version 1.2 (also 1.2.x versions).

      The field will return false if JAVA_VERSION is null.

    • IS_JAVA_1_3

      public static final boolean IS_JAVA_1_3

      Is true if this is Java version 1.3 (also 1.3.x versions).

      The field will return false if JAVA_VERSION is null.

    • IS_JAVA_1_4

      public static final boolean IS_JAVA_1_4

      Is true if this is Java version 1.4 (also 1.4.x versions).

      The field will return false if JAVA_VERSION is null.

    • IS_JAVA_1_5

      public static final boolean IS_JAVA_1_5

      Is true if this is Java version 1.5 (also 1.5.x versions).

      The field will return false if JAVA_VERSION is null.

    • IS_JAVA_1_6

      public static final boolean IS_JAVA_1_6

      Is true if this is Java version 1.6 (also 1.6.x versions).

      The field will return false if JAVA_VERSION is null.

    • IS_JAVA_1_7

      public static final boolean IS_JAVA_1_7

      Is true if this is Java version 1.7 (also 1.7.x versions).

      The field will return false if JAVA_VERSION is null.

      Since:
      3.0

    • IS_JAVA_1_8

      public static final boolean IS_JAVA_1_8

      Is true if this is Java version 1.8 (also 1.8.x versions).

      The field will return false if JAVA_VERSION is null.

      Since:
      3.3.2

    • IS_JAVA_1_9

      @Deprecated public static final boolean IS_JAVA_1_9
      Deprecated.
      As of release 3.5, replaced by IS_JAVA_9

      Is true if this is Java version 1.9 (also 1.9.x versions).

      The field will return false if JAVA_VERSION is null.

      Since:
      3.4

    • IS_JAVA_9

      public static final boolean IS_JAVA_9

      Is true if this is Java version 9 (also 9.x versions).

      The field will return false if JAVA_VERSION is null.

      Since:
      3.5

    • IS_JAVA_10

      public static final boolean IS_JAVA_10

      Is true if this is Java version 10 (also 10.x versions).

      The field will return false if JAVA_VERSION is null.

      Since:
      3.7

    • IS_JAVA_11

      public static final boolean IS_JAVA_11

      Is true if this is Java version 11 (also 11.x versions).

      The field will return false if JAVA_VERSION is null.

      Since:
      3.8

    • IS_JAVA_12

      public static final boolean IS_JAVA_12

      Is true if this is Java version 12 (also 12.x versions).

      The field will return false if JAVA_VERSION is null.

      Since:
      3.9

    • IS_JAVA_13

      public static final boolean IS_JAVA_13

      Is true if this is Java version 13 (also 13.x versions).

      The field will return false if JAVA_VERSION is null.

      Since:
      3.9

    • IS_JAVA_14

      public static final boolean IS_JAVA_14

      Is true if this is Java version 14 (also 14.x versions).

      The field will return false if JAVA_VERSION is null.

      Since:
      3.10

    • IS_JAVA_15

      public static final boolean IS_JAVA_15

      Is true if this is Java version 15 (also 15.x versions).

      The field will return false if JAVA_VERSION is null.

      Since:
      3.10

    • IS_OS_AIX

      public static final boolean IS_OS_AIX

      Is true if this is AIX.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_HP_UX

      public static final boolean IS_OS_HP_UX

      Is true if this is HP-UX.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_400

      public static final boolean IS_OS_400

      Is true if this is IBM OS/400.

      The field will return false if OS_NAME is null.

      Since:
      3.3

    • IS_OS_IRIX

      public static final boolean IS_OS_IRIX

      Is true if this is Irix.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_LINUX

      public static final boolean IS_OS_LINUX

      Is true if this is Linux.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_MAC

      public static final boolean IS_OS_MAC

      Is true if this is Mac.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_MAC_OSX

      public static final boolean IS_OS_MAC_OSX

      Is true if this is Mac.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_MAC_OSX_CHEETAH

      public static final boolean IS_OS_MAC_OSX_CHEETAH

      Is true if this is Mac OS X Cheetah.

      The field will return false if OS_NAME is null.

      Since:
      3.4

    • IS_OS_MAC_OSX_PUMA

      public static final boolean IS_OS_MAC_OSX_PUMA

      Is true if this is Mac OS X Puma.

      The field will return false if OS_NAME is null.

      Since:
      3.4

    • IS_OS_MAC_OSX_JAGUAR

      public static final boolean IS_OS_MAC_OSX_JAGUAR

      Is true if this is Mac OS X Jaguar.

      The field will return false if OS_NAME is null.

      Since:
      3.4

    • IS_OS_MAC_OSX_PANTHER

      public static final boolean IS_OS_MAC_OSX_PANTHER

      Is true if this is Mac OS X Panther.

      The field will return false if OS_NAME is null.

      Since:
      3.4

    • IS_OS_MAC_OSX_TIGER

      public static final boolean IS_OS_MAC_OSX_TIGER

      Is true if this is Mac OS X Tiger.

      The field will return false if OS_NAME is null.

      Since:
      3.4

    • IS_OS_MAC_OSX_LEOPARD

      public static final boolean IS_OS_MAC_OSX_LEOPARD

      Is true if this is Mac OS X Leopard.

      The field will return false if OS_NAME is null.

      Since:
      3.4

    • IS_OS_MAC_OSX_SNOW_LEOPARD

      public static final boolean IS_OS_MAC_OSX_SNOW_LEOPARD

      Is true if this is Mac OS X Snow Leopard.

      The field will return false if OS_NAME is null.

      Since:
      3.4

    • IS_OS_MAC_OSX_LION

      public static final boolean IS_OS_MAC_OSX_LION

      Is true if this is Mac OS X Lion.

      The field will return false if OS_NAME is null.

      Since:
      3.4

    • IS_OS_MAC_OSX_MOUNTAIN_LION

      public static final boolean IS_OS_MAC_OSX_MOUNTAIN_LION

      Is true if this is Mac OS X Mountain Lion.

      The field will return false if OS_NAME is null.

      Since:
      3.4

    • IS_OS_MAC_OSX_MAVERICKS

      public static final boolean IS_OS_MAC_OSX_MAVERICKS

      Is true if this is Mac OS X Mavericks.

      The field will return false if OS_NAME is null.

      Since:
      3.4

    • IS_OS_MAC_OSX_YOSEMITE

      public static final boolean IS_OS_MAC_OSX_YOSEMITE

      Is true if this is Mac OS X Yosemite.

      The field will return false if OS_NAME is null.

      Since:
      3.4

    • IS_OS_MAC_OSX_EL_CAPITAN

      public static final boolean IS_OS_MAC_OSX_EL_CAPITAN

      Is true if this is Mac OS X El Capitan.

      The field will return false if OS_NAME is null.

      Since:
      3.5

    • IS_OS_MAC_OSX_SIERRA

      public static final boolean IS_OS_MAC_OSX_SIERRA

      Is true if this is Mac OS X Sierra.

      The field will return false if OS_NAME is null.

      Since:
      3.12.0

    • IS_OS_MAC_OSX_HIGH_SIERRA

      public static final boolean IS_OS_MAC_OSX_HIGH_SIERRA

      Is true if this is Mac OS X High Sierra.

      The field will return false if OS_NAME is null.

      Since:
      3.12.0

    • IS_OS_MAC_OSX_MOJAVE

      public static final boolean IS_OS_MAC_OSX_MOJAVE

      Is true if this is Mac OS X Mojave.

      The field will return false if OS_NAME is null.

      Since:
      3.12.0

    • IS_OS_MAC_OSX_CATALINA

      public static final boolean IS_OS_MAC_OSX_CATALINA

      Is true if this is Mac OS X Catalina.

      The field will return false if OS_NAME is null.

      Since:
      3.12.0

    • IS_OS_MAC_OSX_BIG_SUR

      public static final boolean IS_OS_MAC_OSX_BIG_SUR

      Is true if this is Mac OS X Big Sur.

      The field will return false if OS_NAME is null.

      Since:
      3.12.0

    • IS_OS_FREE_BSD

      public static final boolean IS_OS_FREE_BSD

      Is true if this is FreeBSD.

      The field will return false if OS_NAME is null.

      Since:
      3.1

    • IS_OS_OPEN_BSD

      public static final boolean IS_OS_OPEN_BSD

      Is true if this is OpenBSD.

      The field will return false if OS_NAME is null.

      Since:
      3.1

    • IS_OS_NET_BSD

      public static final boolean IS_OS_NET_BSD

      Is true if this is NetBSD.

      The field will return false if OS_NAME is null.

      Since:
      3.1

    • IS_OS_OS2

      public static final boolean IS_OS_OS2

      Is true if this is OS/2.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_SOLARIS

      public static final boolean IS_OS_SOLARIS

      Is true if this is Solaris.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_SUN_OS

      public static final boolean IS_OS_SUN_OS

      Is true if this is SunOS.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_UNIX

      public static final boolean IS_OS_UNIX

      Is true if this is a UNIX like system, as in any of AIX, HP-UX, Irix, Linux, MacOSX, Solaris or SUN OS.

      The field will return false if OS_NAME is null.

      Since:
      2.1

    • IS_OS_WINDOWS

      public static final boolean IS_OS_WINDOWS

      Is true if this is Windows.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_WINDOWS_2000

      public static final boolean IS_OS_WINDOWS_2000

      Is true if this is Windows 2000.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_WINDOWS_2003

      public static final boolean IS_OS_WINDOWS_2003

      Is true if this is Windows 2003.

      The field will return false if OS_NAME is null.

      Since:
      3.1

    • IS_OS_WINDOWS_2008

      public static final boolean IS_OS_WINDOWS_2008

      Is true if this is Windows Server 2008.

      The field will return false if OS_NAME is null.

      Since:
      3.1

    • IS_OS_WINDOWS_2012

      public static final boolean IS_OS_WINDOWS_2012

      Is true if this is Windows Server 2012.

      The field will return false if OS_NAME is null.

      Since:
      3.4

    • IS_OS_WINDOWS_95

      public static final boolean IS_OS_WINDOWS_95

      Is true if this is Windows 95.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_WINDOWS_98

      public static final boolean IS_OS_WINDOWS_98

      Is true if this is Windows 98.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_WINDOWS_ME

      public static final boolean IS_OS_WINDOWS_ME

      Is true if this is Windows ME.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_WINDOWS_NT

      public static final boolean IS_OS_WINDOWS_NT

      Is true if this is Windows NT.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_WINDOWS_XP

      public static final boolean IS_OS_WINDOWS_XP

      Is true if this is Windows XP.

      The field will return false if OS_NAME is null.

      Since:
      2.0

    • IS_OS_WINDOWS_VISTA

      public static final boolean IS_OS_WINDOWS_VISTA

      Is true if this is Windows Vista.

      The field will return false if OS_NAME is null.

      Since:
      2.4

    • IS_OS_WINDOWS_7

      public static final boolean IS_OS_WINDOWS_7

      Is true if this is Windows 7.

      The field will return false if OS_NAME is null.

      Since:
      3.0

    • IS_OS_WINDOWS_8

      public static final boolean IS_OS_WINDOWS_8

      Is true if this is Windows 8.

      The field will return false if OS_NAME is null.

      Since:
      3.2

    • IS_OS_WINDOWS_10

      public static final boolean IS_OS_WINDOWS_10

      Is true if this is Windows 10.

      The field will return false if OS_NAME is null.

      Since:
      3.5

    • IS_OS_ZOS

      public static final boolean IS_OS_ZOS

      Is true if this is z/OS.

      The field will return false if OS_NAME is null.

      Since:
      3.5

  • Constructor Details

    • SystemUtils

      public SystemUtils()

      SystemUtils instances should NOT be constructed in standard programming. Instead, the class should be used as SystemUtils.FILE_SEPARATOR.

      This constructor is public to permit tools that require a JavaBean instance to operate.

  • Method Details

    • getEnvironmentVariable

      public static String getEnvironmentVariable(String name, String defaultValue)

      Gets an environment variable, defaulting to defaultValue if the variable cannot be read.

      If a SecurityException is caught, the return value is defaultValue and a message is written to System.err.

      Parameters:
      name - the environment variable name
      defaultValue - the default value
      Returns:
      the environment variable value or defaultValue if a security problem occurs
      Since:
      3.8

    • getHostName

      public static String getHostName()
      Gets the host name from an environment variable (COMPUTERNAME on Windows, HOSTNAME elsewhere).

      If you want to know what the network stack says is the host name, you should use InetAddress.getLocalHost().getHostName().

      Returns:
      the host name. Will be null if the environment variable is not defined.
      Since:
      3.6

    • getJavaHome

      public static File getJavaHome()

      Gets the Java home directory as a File.

      Returns:
      a directory
      Throws:
      SecurityException - if a security manager exists and its checkPropertyAccess method doesn't allow access to the specified system property.
      Since:
      2.1
      See Also:

    • getJavaIoTmpDir

      public static File getJavaIoTmpDir()

      Gets the Java IO temporary directory as a File.

      Returns:
      a directory
      Throws:
      SecurityException - if a security manager exists and its checkPropertyAccess method doesn't allow access to the specified system property.
      Since:
      2.1
      See Also:

    • getUserDir

      public static File getUserDir()

      Gets the user directory as a File.

      Returns:
      a directory
      Throws:
      SecurityException - if a security manager exists and its checkPropertyAccess method doesn't allow access to the specified system property.
      Since:
      2.1
      See Also:

    • getUserHome

      public static File getUserHome()

      Gets the user home directory as a File.

      Returns:
      a directory
      Throws:
      SecurityException - if a security manager exists and its checkPropertyAccess method doesn't allow access to the specified system property.
      Since:
      2.1
      See Also:

    • getUserName

      public static String getUserName()

      Gets the user name.

      Returns:
      a name
      Throws:
      SecurityException - if a security manager exists and its checkPropertyAccess method doesn't allow access to the specified system property.
      Since:
      3.10
      See Also:

    • getUserName

      public static String getUserName(String defaultValue)

      Gets the user name.

      Parameters:
      defaultValue - A default value.
      Returns:
      a name
      Throws:
      SecurityException - if a security manager exists and its checkPropertyAccess method doesn't allow access to the specified system property.
      Since:
      3.10
      See Also:

    • isJavaAwtHeadless

      public static boolean isJavaAwtHeadless()
      Returns whether the JAVA_AWT_HEADLESS value is true.
      Returns:
      true if JAVA_AWT_HEADLESS is "true", false otherwise.
      Since:
      2.1, Java 1.4
      See Also:

    • isJavaVersionAtLeast

      public static boolean isJavaVersionAtLeast(JavaVersion requiredVersion)

      Is the Java version at least the requested version.

      Parameters:
      requiredVersion - the required version, for example 1.31f
      Returns:
      true if the actual version is equal or greater than the required version

    • isJavaVersionAtMost

      public static boolean isJavaVersionAtMost(JavaVersion requiredVersion)

      Is the Java version at most the requested version.

      Example input:

      Parameters:
      requiredVersion - the required version, for example 1.31f
      Returns:
      true if the actual version is equal or less than the required version
      Since:
      3.9