org.apache.commons.lang

Class 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.

Since:
1.0

Field Summary

static String
AWT_TOOLKIT
The awt.toolkit System Property.
static String
FILE_ENCODING
The file.encoding System Property.
static String
FILE_SEPARATOR
The file.separator System Property.
static boolean
IS_JAVA_1_1
Is true if this is Java version 1.1 (also 1.1.x versions).
static boolean
IS_JAVA_1_2
Is true if this is Java version 1.2 (also 1.2.x versions).
static boolean
IS_JAVA_1_3
Is true if this is Java version 1.3 (also 1.3.x versions).
static boolean
IS_JAVA_1_4
Is true if this is Java version 1.4 (also 1.4.x versions).
static boolean
IS_JAVA_1_5
Is true if this is Java version 1.5 (also 1.5.x versions).
static boolean
IS_JAVA_1_6
Is true if this is Java version 1.6 (also 1.6.x versions).
static boolean
IS_OS_AIX
Is true if this is AIX.
static boolean
IS_OS_HP_UX
Is true if this is HP-UX.
static boolean
IS_OS_IRIX
Is true if this is Irix.
static boolean
IS_OS_LINUX
Is true if this is Linux.
static boolean
IS_OS_MAC
Is true if this is Mac.
static boolean
IS_OS_MAC_OSX
Is true if this is Mac.
static boolean
IS_OS_OS2
Is true if this is OS/2.
static boolean
IS_OS_SOLARIS
Is true if this is Solaris.
static boolean
IS_OS_SUN_OS
Is true if this is SunOS.
static boolean
IS_OS_UNIX
Is true if this is a POSIX compilant system, as in any of AIX, HP-UX, Irix, Linux, MacOSX, Solaris or SUN OS.
static boolean
IS_OS_WINDOWS
Is true if this is Windows.
static boolean
IS_OS_WINDOWS_2000
Is true if this is Windows 2000.
static boolean
IS_OS_WINDOWS_95
Is true if this is Windows 95.
static boolean
IS_OS_WINDOWS_98
Is true if this is Windows 98.
static boolean
IS_OS_WINDOWS_ME
Is true if this is Windows ME.
static boolean
IS_OS_WINDOWS_NT
Is true if this is Windows NT.
static boolean
IS_OS_WINDOWS_VISTA
Is true if this is Windows Vista.
static boolean
IS_OS_WINDOWS_XP
Is true if this is Windows XP.
static String
JAVA_AWT_FONTS
The java.awt.fonts System Property.
static String
JAVA_AWT_GRAPHICSENV
The java.awt.graphicsenv System Property.
static String
JAVA_AWT_HEADLESS
The java.awt.headless System Property.
static String
JAVA_AWT_PRINTERJOB
The java.awt.printerjob System Property.
static String
JAVA_CLASS_PATH
The java.class.path System Property.
static String
JAVA_CLASS_VERSION
The java.class.version System Property.
static String
JAVA_COMPILER
The java.compiler System Property.
static String
JAVA_ENDORSED_DIRS
The java.endorsed.dirs System Property.
static String
JAVA_EXT_DIRS
The java.ext.dirs System Property.
static String
JAVA_HOME
The java.home System Property.
static String
JAVA_IO_TMPDIR
The java.io.tmpdir System Property.
static String
JAVA_LIBRARY_PATH
The java.library.path System Property.
static String
JAVA_RUNTIME_NAME
The java.runtime.name System Property.
static String
JAVA_RUNTIME_VERSION
The java.runtime.version System Property.
static String
JAVA_SPECIFICATION_NAME
The java.specification.name System Property.
static String
JAVA_SPECIFICATION_VENDOR
The java.specification.vendor System Property.
static String
JAVA_SPECIFICATION_VERSION
The java.specification.version System Property.
static String
JAVA_UTIL_PREFS_PREFERENCES_FACTORY
The java.util.prefs.PreferencesFactory System Property.
static String
JAVA_VENDOR
The java.vendor System Property.
static String
JAVA_VENDOR_URL
The java.vendor.url System Property.
static String
JAVA_VERSION
The java.version System Property.
static float
JAVA_VERSION_FLOAT
Gets the Java version as a float.
static int
JAVA_VERSION_INT
Gets the Java version as an int.
static String
JAVA_VERSION_TRIMMED
Gets the Java version as a String trimming leading letters.
static String
JAVA_VM_INFO
The java.vm.info System Property.
static String
JAVA_VM_NAME
The java.vm.name System Property.
static String
JAVA_VM_SPECIFICATION_NAME
The java.vm.specification.name System Property.
static String
JAVA_VM_SPECIFICATION_VENDOR
The java.vm.specification.vendor System Property.
static String
JAVA_VM_SPECIFICATION_VERSION
The java.vm.specification.version System Property.
static String
JAVA_VM_VENDOR
The java.vm.vendor System Property.
static String
JAVA_VM_VERSION
The java.vm.version System Property.
static String
LINE_SEPARATOR
The line.separator System Property.
static String
OS_ARCH
The os.arch System Property.
static String
OS_NAME
The os.name System Property.
static String
OS_VERSION
The os.version System Property.
static String
PATH_SEPARATOR
The path.separator System Property.
static String
USER_COUNTRY
The user.country or user.region System Property.
static String
USER_DIR
The user.dir System Property.
static String
USER_HOME
The user.home System Property.
static String
USER_LANGUAGE
The user.language System Property.
static String
USER_NAME
The user.name System Property.
static String
USER_TIMEZONE
The user.timezone System Property.

Constructor Summary

SystemUtils()
SystemUtils instances should NOT be constructed in standard programming.

Method Summary

static File
getJavaHome()
Gets the Java home directory as a File.
static File
getJavaIoTmpDir()
Gets the Java IO temporary directory as a File.
static float
getJavaVersion()
Deprecated. Use JAVA_VERSION_FLOAT instead.
static File
getUserDir()
Gets the user directory as a File.
static File
getUserHome()
Gets the user home directory as a File.
static boolean
isJavaAwtHeadless()
Returns whether the JAVA_AWT_HEADLESS value is true.
static boolean
isJavaVersionAtLeast(float requiredVersion)
Is the Java version at least the requested version.
static boolean
isJavaVersionAtLeast(int requiredVersion)
Is the Java version at least the requested version.

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

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(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(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

public static final String FILE_SEPARATOR
The file.separator System Property. File 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(Properties) is called after this class is loaded, the value will be out of sync with that System property.

Since:
Java 1.1
Usages and Demos :

View More Examples of FILE_SEPARATOR
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: 
   4:         ...
   5:         if (projectHome.equals(defaultHome)) {
   6:             projectHome = defaultHome + SystemUtils.FILE_SEPARATOR + "/project";
   7:         }
   8:         ...
   9:         } else {
  10:             contextHome = forrestHome + SystemUtils.FILE_SEPARATOR + "main/webapp";
  11:         }

View Full Code Here

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_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_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
Usages and Demos :

View More Examples of IS_OS_LINUX
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: 
   4:         ...
   5:     public boolean isPlatformSupported() {
   6:         return SystemUtils.IS_OS_LINUX;
   7:     }
   8: 
   9:     @Override

View Full Code Here
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: import org.jitterbit.integration.ui.UnsupportedPlatformException;
   4:         ...
   5:     public static boolean isPlatformSupported() {
   6:         return SystemUtils.IS_OS_WINDOWS || SystemUtils.IS_OS_LINUX;
   7:     }
   8:         ...
   9:     public static WebBrowserFactory newInstance() throws UnsupportedPlatformException {
  10:         if (SystemUtils.IS_OS_WINDOWS) {
  11:             return new WebBrowserFactory() {
  12:         ...
  13:         }
  14:         if (SystemUtils.IS_OS_LINUX) {

View Full Code Here
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: import org.jitterbit.integration.ui.stylesheet.IntegrationUiStyleSheet;
   4:         ...
   5:     private static String getJitterbitFolderName() {
   6:         return SystemUtils.IS_OS_LINUX ? LINUX_FOLDER_NAME : WINDOWS_FOLDER_NAME;
   7:     }
   8:     
   9:     

View Full Code Here

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_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 POSIX compilant 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
Usages and Demos :

View More Examples of IS_OS_WINDOWS
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: import org.jitterbit.integration.runtime.IntegrationRuntime;
   4:         ...
   5:     public static IApplicationInstanceLock getLock(IntegrationRuntime runtime) {
   6:         return SystemUtils.IS_OS_WINDOWS ? 
   7:                         new SocketLock(runtime) : new FileLock(runtime);
   8:     }
   9:     

View Full Code Here
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: 
   4:         ...
   5:     public boolean isPlatformSupported() {
   6:         return SystemUtils.IS_OS_WINDOWS;
   7:     }
   8: 
   9:     @Override

View Full Code Here
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: 
   4:         ...
   5:     public static ILoginUi getUi(ILoginUiContainer container) {
   6:         return SystemUtils.IS_OS_WINDOWS ? new WindowsLoginUi(container) : 
   7:             new StandardLoginUi(container);
   8:     }
   9:     

View Full Code Here
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: 
   4:         ...
   5:     private static boolean isPossiblePopupTriggeringEventId(int id) {
   6:         return SystemUtils.IS_OS_WINDOWS ? 
   7:             (id == MouseEvent.MOUSE_RELEASED) :
   8:                 ((id == MouseEvent.MOUSE_RELEASED) || (id == MouseEvent.MOUSE_PRESSED));
   9:     }

View Full Code Here
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: import org.jitterbit.integration.ui.UnsupportedPlatformException;
   4:         ...
   5:     public static boolean isPlatformSupported() {
   6:         return SystemUtils.IS_OS_WINDOWS || SystemUtils.IS_OS_LINUX;
   7:     }
   8:         ...
   9:     public static WebBrowserFactory newInstance() throws UnsupportedPlatformException {
  10:         if (SystemUtils.IS_OS_WINDOWS) {
  11:             return new WebBrowserFactory() {
  12:         ...
  13:         }
  14:         if (SystemUtils.IS_OS_LINUX) {

View Full Code Here

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
Usages and Demos :

View More Examples of IS_OS_WINDOWS_2000
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: 
   4:         ...
   5:     {
   6:         return !SystemUtils.IS_OS_WINDOWS || 
   7:         ...
   8:             SystemUtils.IS_OS_WINDOWS_2000 || SystemUtils.IS_OS_WINDOWS_XP;
   9:     }

View Full Code Here

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_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_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
Usages and Demos :

View More Examples of IS_OS_WINDOWS_XP
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: 
   4:         ...
   5:     {
   6:         return !SystemUtils.IS_OS_WINDOWS || 
   7:         ...
   8:             SystemUtils.IS_OS_WINDOWS_2000 || SystemUtils.IS_OS_WINDOWS_XP;
   9:     }

View Full Code Here

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(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(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(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_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(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(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(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(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(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(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(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(Properties) is called after this class is loaded, the value will be out of sync with that System property.

Since:
Java 1.2
Usages and Demos :

View More Examples of JAVA_IO_TMPDIR
   1: import org.apache.commons.lang.StringUtils;
   2: import org.apache.commons.lang.SystemUtils;
   3: import org.apache.commons.logging.Log;
   4:         ...
   5:         URL resourceUrl = getClass().getResource("/" + jspName);
   6:         if (resourceUrl != null && SystemUtils.JAVA_IO_TMPDIR != null)
   7:         {
   8:         ...
   9: 
  10:             String path = SystemUtils.JAVA_IO_TMPDIR + jspName;

View Full Code Here

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(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(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(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(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(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(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(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(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(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(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_FLOAT

public static final float JAVA_VERSION_FLOAT
Gets the Java version as a float.

Example return values:

  • 1.2f for JDK 1.2
  • 1.31f for JDK 1.3.1

The field will return zero if JAVA_VERSION is null.

Since:
2.0

JAVA_VERSION_INT

public static final int JAVA_VERSION_INT
Gets the Java version as an int.

Example return values:

  • 120 for JDK 1.2
  • 131 for JDK 1.3.1

The field will return zero if JAVA_VERSION is null.

Since:
2.0

JAVA_VERSION_TRIMMED

public static final String JAVA_VERSION_TRIMMED
Gets the Java version as a String trimming leading letters.

The field will return null if JAVA_VERSION is null.

Since:
2.1

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(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(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(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(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(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(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(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

public static final String LINE_SEPARATOR
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(Properties) is called after this class is loaded, the value will be out of sync with that System property.

Since:
Java 1.1
Usages and Demos :

View More Examples of LINE_SEPARATOR
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: import org.apache.ojb.broker.PersistenceBroker;
   4:         ...
   5:         throw new SequenceManagerException(
   6:                 SystemUtils.LINE_SEPARATOR +
   7:                 "Failure attempting to retrieve a Guid for a field that is an int -- field should be returned as a VARCHAR");
   8:         ...
   9:         throw new SequenceManagerException(
  10:                 SystemUtils.LINE_SEPARATOR +
  11:                 "Failure attempting to retrieve a Guid for a field that is a long -- field should be returned as a VARCHAR");

View Full Code Here
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: import org.apache.ojb.broker.PersistenceBroker;
   4:         ...
   5:                 throw new SequenceManagerException(
   6:                         SystemUtils.LINE_SEPARATOR +
   7:         ...
   8:                         "Could not grab next id, failed with " + SystemUtils.LINE_SEPARATOR +
   9:         ...
  10:                         e.getMessage() + SystemUtils.LINE_SEPARATOR +

View Full Code Here
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: import org.apache.ojb.broker.Identity;
   4:         ...
   5:                     throw new SequenceManagerException("Sequence generation failed: " +
   6:                             SystemUtils.LINE_SEPARATOR + "Sequence: " + seq +
   7:                             ". Unable to build new ID, id was always 0." +
   8:         ...
   9:                             SystemUtils.LINE_SEPARATOR + "Thread: " + Thread.currentThread() +
  10:         ...
  11:                             SystemUtils.LINE_SEPARATOR + "PB: " + getBrokerForClass());

View Full Code Here
   1: import javawebparts.core.org.apache.commons.lang.ObjectUtils;
   2: import javawebparts.core.org.apache.commons.lang.SystemUtils;
   3: 
   4:         ...
   5:             this.setContentStart("[");
   6:             this.setFieldSeparator(SystemUtils.LINE_SEPARATOR + "  ");
   7:             this.setFieldSeparatorAtStart(true);
   8:         ...
   9:             this.setContentEnd(SystemUtils.LINE_SEPARATOR + "]");
  10:         }

View Full Code Here
   1: import org.apache.commons.lang.ObjectUtils;
   2: import org.apache.commons.lang.SystemUtils;
   3: 
   4:         ...
   5:             this.setContentStart("[");
   6:             this.setFieldSeparator(SystemUtils.LINE_SEPARATOR + "  ");
   7:             this.setFieldSeparatorAtStart(true);
   8:         ...
   9:             this.setContentEnd(SystemUtils.LINE_SEPARATOR + "]");
  10:         }

View Full Code Here

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(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(Properties) is called after this class is loaded, the value will be out of sync with that System property.

Since:
Java 1.1
Usages and Demos :

View More Examples of OS_NAME
   1: 
   2: import org.apache.commons.lang.SystemUtils;
   3: 
   4:         ...
   5:             dRequest.setJavaVersion( System.getProperty( "java.version" ) );
   6:             dRequest.setOperatingSystem( SystemUtils.OS_NAME );
   7:             
   8:             dRequest.setHostid( cfg.mProgramClientID.toHexString() );
   9:             dRequest.setShowBetaInfo( cfg.showBetaUpdateNotification );

View Full Code Here

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(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

public static final String PATH_SEPARATOR
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(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 JDK 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(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(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(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(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(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(Properties) is called after this class is loaded, the value will be out of sync with that System property.

Since:
2.1

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

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

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

getJavaVersion

public static float getJavaVersion()

Deprecated. Use JAVA_VERSION_FLOAT instead. Method will be removed in Commons Lang 3.0.

Gets the Java version number as a float.

Example return values:

  • 1.2f for JDK 1.2
  • 1.31f for JDK 1.3.1
Returns:
the version, for example 1.31f for JDK 1.3.1

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

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

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

isJavaVersionAtLeast

public static boolean isJavaVersionAtLeast(float requiredVersion)
Is the Java version at least the requested version.

Example input:

  • 1.2f to test for JDK 1.2
  • 1.31f to test for JDK 1.3.1
Parameters:
requiredVersion - the required version, for example 1.31f
Returns:
true if the actual version is equal or greater than the required version
Usages and Demos :

View More Examples of isJavaVersionAtLeast(float requiredVersion)
   1: import org.apache.commons.lang.SystemUtils;
   2: 
   3:         ...
   4:     public static void main(String[] args) {
   5:         System.out.println("1) FILE_SEPARATOR =" + SystemUtils.FILE_SEPARATOR);
   6:         ...
   7:         System.out.println("2) JAVA_EXT_DIRS =" + SystemUtils.JAVA_EXT_DIRS);
   8:         System.out.println("3) JAVA_HOME =" + SystemUtils.JAVA_HOME);
   9:         ...
  10:         System.out.println("4) Is 1.3 + =" +
  11:             SystemUtils.isJavaVersionAtLeast(1.3f));

View Full Code Here

isJavaVersionAtLeast

public static boolean isJavaVersionAtLeast(int requiredVersion)
Is the Java version at least the requested version.

Example input:

  • 120 to test for JDK 1.2 or greater
  • 131 to test for JDK 1.3.1 or greater
Parameters:
requiredVersion - the required version, for example 131
Returns:
true if the actual version is equal or greater than the required version
Since:
2.0
Usages and Demos :

View More Examples of isJavaVersionAtLeast(int requiredVersion)
   1: import org.apache.commons.lang.SystemUtils;
   2: 
   3:         ...
   4:     public static void main(String[] args) {
   5:         System.out.println("1) FILE_SEPARATOR =" + SystemUtils.FILE_SEPARATOR);
   6:         ...
   7:         System.out.println("2) JAVA_EXT_DIRS =" + SystemUtils.JAVA_EXT_DIRS);
   8:         System.out.println("3) JAVA_HOME =" + SystemUtils.JAVA_HOME);
   9:         ...
  10:         System.out.println("4) Is 1.3 + =" +
  11:             SystemUtils.isJavaVersionAtLeast(1.3f));

View Full Code Here