How do I programmatically determine operating system in Java

Question

I would like to determine the operating system of the host that my Java program is running programmatically  for example  I would like to be able to load different properties based on whether I am on a Windows or Unix platform   What is the safest way to do this with 100  reliability

User · Answer

Just use com sun javafx util Utils as below   if   Utils isWindows             LOGIC HERE     OR USE   boolean isWindows   OSInfo getOSType   equals OSInfo OSType WINDOWS          if  isWindows               YOUR LOGIC HERE

User · Answer

TL DR  For accessing OS use  System getProperty  os name       But why not create a utility class  make it reusable  And probably much faster on multiple calls  Clean  clear  faster   Create a Util class for such utility functions  Then create public enums for each operating system type    public class Util                public enum OS               WINDOWS  LINUX  MAC  SOLARIS              Operating systems       private static OS os   null       public static OS getOS             if  os    null                String operSys   System getProperty  os name   toLowerCase                if  operSys contains  win                      os   OS WINDOWS                else if  operSys contains  nix      operSys contains  nux                          operSys contains  aix                      os   OS LINUX                else if  operSys contains  mac                      os   OS MAC                else if  operSys contains  sunos                      os   OS SOLARIS                                  return os            Now  you can easily invoke class from any class as follows  P S  Since we declared os variable as static  it will consume time only once to identify the system type  then it can be used until your application halts                 switch  Util getOS                  case WINDOWS                    do windows stuff                 break              case LINUX    and That is it

User · Answer

Just use com sun javafx util Utils as below   if   Utils isWindows             LOGIC HERE     OR USE   boolean isWindows   OSInfo getOSType   equals OSInfo OSType WINDOWS          if  isWindows               YOUR LOGIC HERE

User · Answer

If you re interested in how an open source project does stuff like this  you can check out the Terracotta class  Os java  that handles this junk here    http   svn terracotta org svn tc dso trunk code base common src com tc util runtime  http   svn terracotta org svn tc dso tags 2 6 4 code base common src com tc util runtime    And you can see a similar class to handle JVM versions  Vm java and VmVersion java  here    http   svn terracotta org svn tc dso trunk common src main java com tc util runtime

User · Answer

You can just use sun awt OSInfo getOSType   method

User · Answer

You can just use sun awt OSInfo getOSType   method

User · Answer

If you re interested in how an open source project does stuff like this  you can check out the Terracotta class  Os java  that handles this junk here    http   svn terracotta org svn tc dso trunk code base common src com tc util runtime  http   svn terracotta org svn tc dso tags 2 6 4 code base common src com tc util runtime    And you can see a similar class to handle JVM versions  Vm java and VmVersion java  here    http   svn terracotta org svn tc dso trunk common src main java com tc util runtime

User · Answer

You can use   System getProperty  os name     P S  You may find this code useful   class ShowProperties       public static void main String   args            System getProperties   list System out             All it does is print out all the properties provided by your Java implementations  It ll give you an idea of what you can find out about your Java environment via properties   -

User · Answer

Try this simple and easy  System getProperty  os name    System getProperty  os version    System getProperty  os arch

User · Answer

As indicated in other answers  System getProperty provides the raw data   However  the Apache Commons Lang component provides a wrapper for java lang System with handy properties like SystemUtils IS OS WINDOWS  much like the aforementioned Swingx OS util

User · Answer

You can use   System getProperty  os name     P S  You may find this code useful   class ShowProperties       public static void main String   args            System getProperties   list System out             All it does is print out all the properties provided by your Java implementations  It ll give you an idea of what you can find out about your Java environment via properties   -

User · Answer

I find that the OS Utils from Swingx does the job

User · Answer

You can use   System getProperty  os name     P S  You may find this code useful   class ShowProperties       public static void main String   args            System getProperties   list System out             All it does is print out all the properties provided by your Java implementations  It ll give you an idea of what you can find out about your Java environment via properties   -

User · Answer

some of the links in the answers above seem to be broken  I have added pointers to current source code in the code below and offer an approach for handling the check with an enum as an answer so that a switch statement can be used when evaluating the result   OsCheck OSType ostype OsCheck getOperatingSystemType    switch  ostype        case Windows  break      case MacOS  break      case Linux  break      case Other  break      The helper class is          helper class to check the operating system this Java VM runs in       please keep the notes below as a pseudo-license       http   stackoverflow com questions 228477 how-do-i-programmatically-determine-operating-system-in-java    compare to http   svn terracotta org svn tc dso tags 2 6 4 code base common src com tc util runtime Os java    http   www docjar com html api org apache commons lang SystemUtils java html     import java util Locale  public static final class OsCheck              types of Operating Systems         public enum OSType       Windows  MacOS  Linux  Other            cached result of OS detection   protected static OSType detectedOS              detect the operating system from the os name System property and cache      the result             returns - the operating system detected         public static OSType getOperatingSystemType         if  detectedOS    null          String OS   System getProperty  os name    generic   toLowerCase Locale ENGLISH         if   OS indexOf  mac    gt   0      OS indexOf  darwin    gt   0             detectedOS   OSType MacOS          else if  OS indexOf  win    gt   0            detectedOS   OSType Windows          else if  OS indexOf  nux    gt   0            detectedOS   OSType Linux          else           detectedOS   OSType Other                    return detectedOS

User · Answer

I find that the OS Utils from Swingx does the job

User · Answer

If you re interested in how an open source project does stuff like this  you can check out the Terracotta class  Os java  that handles this junk here    http   svn terracotta org svn tc dso trunk code base common src com tc util runtime  http   svn terracotta org svn tc dso tags 2 6 4 code base common src com tc util runtime    And you can see a similar class to handle JVM versions  Vm java and VmVersion java  here    http   svn terracotta org svn tc dso trunk common src main java com tc util runtime

User · Answer

I think following can give broader coverage in fewer lines  import org apache commons exec OS   if  OS isFamilyWindows                       load some property               else if  OS isFamilyUnix                       load some other property                 More details here  https   commons apache org proper commons-exec apidocs org apache commons exec OS html

User · Answer

In com sun jna Platform class you can find useful static methods like   Platform isWindows    Platform is64Bit    Platform isIntel    Platform isARM      and much more   If you use Maven just add dependency   lt dependency gt    lt groupId gt net java dev jna lt  groupId gt    lt artifactId gt jna lt  artifactId gt    lt version gt 5 2 0 lt  version gt   lt  dependency gt    Otherwise just find jna library jar file  ex  jna-5 2 0 jar  and add it to classpath

User · Answer

String osName   System getProperty  os name    System out println  Operating system     osName

User · Answer

The following JavaFX classes have static methods to determine current OS  isWindows   isLinux          com sun javafx PlatformUtil  com sun media jfxmediaimpl HostUtils com sun javafx util Utils   Example   if  PlatformUtil isWindows

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This code for displaying all information about the system os type name   java information and so on   public static void main String   args           TODO Auto-generated method stub     Properties pro   System getProperties        for Object obj   pro keySet             System out println   System     String obj            System getProperty  String obj

User · Answer

You can use   System getProperty  os name     P S  You may find this code useful   class ShowProperties       public static void main String   args            System getProperties   list System out             All it does is print out all the properties provided by your Java implementations  It ll give you an idea of what you can find out about your Java environment via properties   -

User · Answer

A small example of what you re trying to achieve would probably be a class similar to what s underneath   import java util Locale   public class OperatingSystem       private static String OS   System getProperty  os name    unknown   toLowerCase Locale ROOT        public static boolean isWindows                 return OS contains  win               public static boolean isMac                 return OS contains  mac               public static boolean isUnix                 return OS contains  nux              This particular implementation is quite reliable and should be universally applicable  Just copy and paste it into your class of choice

User · Answer

If you re interested in how an open source project does stuff like this  you can check out the Terracotta class  Os java  that handles this junk here    http   svn terracotta org svn tc dso trunk code base common src com tc util runtime  http   svn terracotta org svn tc dso tags 2 6 4 code base common src com tc util runtime    And you can see a similar class to handle JVM versions  Vm java and VmVersion java  here    http   svn terracotta org svn tc dso trunk common src main java com tc util runtime

User · Answer

A small example of what you re trying to achieve would probably be a class similar to what s underneath   import java util Locale   public class OperatingSystem       private static String OS   System getProperty  os name    unknown   toLowerCase Locale ROOT        public static boolean isWindows                 return OS contains  win               public static boolean isMac                 return OS contains  mac               public static boolean isUnix                 return OS contains  nux              This particular implementation is quite reliable and should be universally applicable  Just copy and paste it into your class of choice

User · Answer

Oct  2008   I would recommend to cache it in a static variable   public static final class OsUtils      private static String OS   null     public static String getOsName              if OS    null    OS   System getProperty  os name            return OS          public static boolean isWindows              return getOsName   startsWith  Windows             public static boolean isUnix      and so on     That way  every time you ask for the Os  you do not fetch the property more than once in the lifetime of your application     February 2016  7  years later   There is a bug with Windows 10  which did not exist at the time of the original answer   See  Java s    os name    for Windows 10

User · Answer

As indicated in other answers  System getProperty provides the raw data   However  the Apache Commons Lang component provides a wrapper for java lang System with handy properties like SystemUtils IS OS WINDOWS  much like the aforementioned Swingx OS util

User · Answer

I think following can give broader coverage in fewer lines  import org apache commons exec OS   if  OS isFamilyWindows                       load some property               else if  OS isFamilyUnix                       load some other property                 More details here  https   commons apache org proper commons-exec apidocs org apache commons exec OS html

User · Answer

Below code shows the values that you can get from System API  these all things you can get through this API   public class App       public static void main  String   args               Operating system name         System out println System getProperty  os name                Operating system version         System out println System getProperty  os version                Path separator character used in java class path         System out println System getProperty  path separator                User working directory         System out println System getProperty  user dir                User home directory         System out println System getProperty  user home                User account name         System out println System getProperty  user name                Operating system architecture         System out println System getProperty  os arch                Sequence used by operating system to separate lines in text files         System out println System getProperty  line separator              System out println System getProperty  java version       JRE version number          System out println System getProperty  java vendor url       JRE vendor URL          System out println System getProperty  java vendor       JRE vendor name          System out println System getProperty  java home       Installation directory for Java Runtime Environment  JRE           System out println System getProperty  java class path              System out println System getProperty  file separator               Answers -  Windows 7 6 1   C  Users user Documents workspace-eclipse JavaExample C  Users user user amd64   1 7 0 71 http   java oracle com  Oracle Corporation C  Program Files Java jre7 C  Users user Documents workspace-Eclipse JavaExample target classes

User · Answer

I find that the OS Utils from Swingx does the job

User · Answer

some of the links in the answers above seem to be broken  I have added pointers to current source code in the code below and offer an approach for handling the check with an enum as an answer so that a switch statement can be used when evaluating the result   OsCheck OSType ostype OsCheck getOperatingSystemType    switch  ostype        case Windows  break      case MacOS  break      case Linux  break      case Other  break      The helper class is          helper class to check the operating system this Java VM runs in       please keep the notes below as a pseudo-license       http   stackoverflow com questions 228477 how-do-i-programmatically-determine-operating-system-in-java    compare to http   svn terracotta org svn tc dso tags 2 6 4 code base common src com tc util runtime Os java    http   www docjar com html api org apache commons lang SystemUtils java html     import java util Locale  public static final class OsCheck              types of Operating Systems         public enum OSType       Windows  MacOS  Linux  Other            cached result of OS detection   protected static OSType detectedOS              detect the operating system from the os name System property and cache      the result             returns - the operating system detected         public static OSType getOperatingSystemType         if  detectedOS    null          String OS   System getProperty  os name    generic   toLowerCase Locale ENGLISH         if   OS indexOf  mac    gt   0      OS indexOf  darwin    gt   0             detectedOS   OSType MacOS          else if  OS indexOf  win    gt   0            detectedOS   OSType Windows          else if  OS indexOf  nux    gt   0            detectedOS   OSType Linux          else           detectedOS   OSType Other                    return detectedOS

User · Answer

Oct  2008   I would recommend to cache it in a static variable   public static final class OsUtils      private static String OS   null     public static String getOsName              if OS    null    OS   System getProperty  os name            return OS          public static boolean isWindows              return getOsName   startsWith  Windows             public static boolean isUnix      and so on     That way  every time you ask for the Os  you do not fetch the property more than once in the lifetime of your application     February 2016  7  years later   There is a bug with Windows 10  which did not exist at the time of the original answer   See  Java s    os name    for Windows 10

User · Answer

String osName   System getProperty  os name    System out println  Operating system     osName

User · Answer

If you re working in a security sensitive environment  then please read this through  Please refrain from ever trusting a property obtained via the System getProperty String  subroutine  Actually  almost every property including os arch  os name  and os version isn t readonly as you d might expect     instead  they re actually quite the opposite  First of all  any code with sufficient permission of invoking the System setProperty String  String  subroutine can modify the returned literal at will  However  that s not necessarily the primary issue here  as it can be resolved through the use of a so called SecurityManager  as described in greater detail over here  The actual issue is that any user is able to edit these properties when running the JAR in question  through -Dos name   -Dos arch   etc    A possible way to avoid tampering with the application parameters is by querying the RuntimeMXBean as shown here  The following code snippet should provide some insight into how this may be achieved  RuntimeMXBean runtimeMxBean   ManagementFactory getRuntimeMXBean    List lt String gt  arguments   runtimeMxBean getInputArguments     for  String argument   arguments        if  argument startsWith  quot -Dos name quot                System getProperty  quot os name quot   altered       else if  argument startsWith  quot -Dos arch quot                System getProperty  quot os arch quot   altered

User · Answer

I liked Wolfgang s answer  just because I believe things like that should be consts     so I ve rephrased it a bit for myself  and thought to share it            types of Operating Systems       please keep the note below as a pseudo-license       helper class to check the operating system this Java VM runs in    http   stackoverflow com questions 228477 how-do-i-programmatically-determine-operating-system-in-java    compare to http   svn terracotta org svn tc dso tags 2 6 4 code base common src com tc util runtime Os java    http   www docjar com html api org apache commons lang SystemUtils java html     public enum OSType       MacOS  mac    darwin        Windows  win        Linux  nux        Other  generic         private static OSType detectedOS       private final String   keys       private OSType String    keys            this keys   keys             private boolean match String osKey            for  int i   0  i  lt  keys length  i                  if  osKey indexOf keys i      -1                  return true                    return false             public static OSType getOS Type             if  detectedOS    null              detectedOS   getOperatingSystemType System getProperty  os name   Other keys 0   toLowerCase             return detectedOS             private static OSType getOperatingSystemType String osKey            for  OSType osType   values                  if  osType match osKey                   return osType                    return Other

User · Answer

The following JavaFX classes have static methods to determine current OS  isWindows   isLinux          com sun javafx PlatformUtil  com sun media jfxmediaimpl HostUtils com sun javafx util Utils   Example   if  PlatformUtil isWindows

User · Answer

If you re working in a security sensitive environment  then please read this through  Please refrain from ever trusting a property obtained via the System getProperty String  subroutine  Actually  almost every property including os arch  os name  and os version isn t readonly as you d might expect     instead  they re actually quite the opposite  First of all  any code with sufficient permission of invoking the System setProperty String  String  subroutine can modify the returned literal at will  However  that s not necessarily the primary issue here  as it can be resolved through the use of a so called SecurityManager  as described in greater detail over here  The actual issue is that any user is able to edit these properties when running the JAR in question  through -Dos name   -Dos arch   etc    A possible way to avoid tampering with the application parameters is by querying the RuntimeMXBean as shown here  The following code snippet should provide some insight into how this may be achieved  RuntimeMXBean runtimeMxBean   ManagementFactory getRuntimeMXBean    List lt String gt  arguments   runtimeMxBean getInputArguments     for  String argument   arguments        if  argument startsWith  quot -Dos name quot                System getProperty  quot os name quot   altered       else if  argument startsWith  quot -Dos arch quot                System getProperty  quot os arch quot   altered

User · Answer

Below code shows the values that you can get from System API  these all things you can get through this API   public class App       public static void main  String   args               Operating system name         System out println System getProperty  os name                Operating system version         System out println System getProperty  os version                Path separator character used in java class path         System out println System getProperty  path separator                User working directory         System out println System getProperty  user dir                User home directory         System out println System getProperty  user home                User account name         System out println System getProperty  user name                Operating system architecture         System out println System getProperty  os arch                Sequence used by operating system to separate lines in text files         System out println System getProperty  line separator              System out println System getProperty  java version       JRE version number          System out println System getProperty  java vendor url       JRE vendor URL          System out println System getProperty  java vendor       JRE vendor name          System out println System getProperty  java home       Installation directory for Java Runtime Environment  JRE           System out println System getProperty  java class path              System out println System getProperty  file separator               Answers -  Windows 7 6 1   C  Users user Documents workspace-eclipse JavaExample C  Users user user amd64   1 7 0 71 http   java oracle com  Oracle Corporation C  Program Files Java jre7 C  Users user Documents workspace-Eclipse JavaExample target classes

User · Answer

Oct  2008   I would recommend to cache it in a static variable   public static final class OsUtils      private static String OS   null     public static String getOsName              if OS    null    OS   System getProperty  os name            return OS          public static boolean isWindows              return getOsName   startsWith  Windows             public static boolean isUnix      and so on     That way  every time you ask for the Os  you do not fetch the property more than once in the lifetime of your application     February 2016  7  years later   There is a bug with Windows 10  which did not exist at the time of the original answer   See  Java s    os name    for Windows 10

User · Answer

Try this simple and easy  System getProperty  os name    System getProperty  os version    System getProperty  os arch

User · Answer

Oct  2008   I would recommend to cache it in a static variable   public static final class OsUtils      private static String OS   null     public static String getOsName              if OS    null    OS   System getProperty  os name            return OS          public static boolean isWindows              return getOsName   startsWith  Windows             public static boolean isUnix      and so on     That way  every time you ask for the Os  you do not fetch the property more than once in the lifetime of your application     February 2016  7  years later   There is a bug with Windows 10  which did not exist at the time of the original answer   See  Java s    os name    for Windows 10

User · Answer

In com sun jna Platform class you can find useful static methods like   Platform isWindows    Platform is64Bit    Platform isIntel    Platform isARM      and much more   If you use Maven just add dependency   lt dependency gt    lt groupId gt net java dev jna lt  groupId gt    lt artifactId gt jna lt  artifactId gt    lt version gt 5 2 0 lt  version gt   lt  dependency gt    Otherwise just find jna library jar file  ex  jna-5 2 0 jar  and add it to classpath

User · Answer

I liked Wolfgang s answer  just because I believe things like that should be consts     so I ve rephrased it a bit for myself  and thought to share it            types of Operating Systems       please keep the note below as a pseudo-license       helper class to check the operating system this Java VM runs in    http   stackoverflow com questions 228477 how-do-i-programmatically-determine-operating-system-in-java    compare to http   svn terracotta org svn tc dso tags 2 6 4 code base common src com tc util runtime Os java    http   www docjar com html api org apache commons lang SystemUtils java html     public enum OSType       MacOS  mac    darwin        Windows  win        Linux  nux        Other  generic         private static OSType detectedOS       private final String   keys       private OSType String    keys            this keys   keys             private boolean match String osKey            for  int i   0  i  lt  keys length  i                  if  osKey indexOf keys i      -1                  return true                    return false             public static OSType getOS Type             if  detectedOS    null              detectedOS   getOperatingSystemType System getProperty  os name   Other keys 0   toLowerCase             return detectedOS             private static OSType getOperatingSystemType String osKey            for  OSType osType   values                  if  osType match osKey                   return osType                    return Other

User · Answer

I find that the OS Utils from Swingx does the job

User · Answer

TL DR  For accessing OS use  System getProperty  os name       But why not create a utility class  make it reusable  And probably much faster on multiple calls  Clean  clear  faster   Create a Util class for such utility functions  Then create public enums for each operating system type    public class Util                public enum OS               WINDOWS  LINUX  MAC  SOLARIS              Operating systems       private static OS os   null       public static OS getOS             if  os    null                String operSys   System getProperty  os name   toLowerCase                if  operSys contains  win                      os   OS WINDOWS                else if  operSys contains  nix      operSys contains  nux                          operSys contains  aix                      os   OS LINUX                else if  operSys contains  mac                      os   OS MAC                else if  operSys contains  sunos                      os   OS SOLARIS                                  return os            Now  you can easily invoke class from any class as follows  P S  Since we declared os variable as static  it will consume time only once to identify the system type  then it can be used until your application halts                 switch  Util getOS                  case WINDOWS                    do windows stuff                 break              case LINUX    and That is it

User · Answer

This code for displaying all information about the system os type name   java information and so on   public static void main String   args           TODO Auto-generated method stub     Properties pro   System getProperties        for Object obj   pro keySet             System out println   System     String obj            System getProperty  String obj

[java] How do I programmatically determine operating system in Java?

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