Java obtains information about the current operating system.

Java obtains information about the current operating system.

There are several mainstream methods, one is to use the following functions
Public static String getProperty (String key)

Key	Description of related values
Java. version	Java. version Java Runtime Environment version
Java. vendor	Java. vendor Java Runtime Environment vendor
Java. vendor. url	Java. vendor. url URL of the Java vendor
Java. home	Java. home Java installation directory
Java. vm. specification. version	Java. vm. specification. version Java Virtual Machine standard version
Java. vm. specification. vendor	Java. vm. specification. vendor Java virtual machine specification vendor
Java. vm. specification. name	Java. vm. specification. name Java virtual machine specification name
Java. vm. version	Java. vm. version Java Virtual Machine implementation version
Java. vm. vendor	Java. vm. vendor Java Virtual Machine implementation vendor
Java. vm. name	Java. vm. name Java Virtual Machine implementation name
Java. specification. version	Java. specification. version Java Runtime Environment Standard version
Java. specification. vendor	Java. specification. vendor Java Runtime Environment specification vendor
Java. specification. name	Java. specification. name Java Runtime Environment Standard name
Java. class. version	Java. class. version Java class format version number
Java. class. path	Java. class. path Java class path
Java. library. path	List of paths searched when the java. library. path library is loaded
Java. io. tmpdir	Java. io. tmpdir default temporary file path
Java. compiler	Name of the JIT compiler to be used by java. compiler
Java. ext. dirs	Java. ext. dirs: path of one or more extension Directories
OS. name	OS. name of the Operating System
OS. arch	OS. arch Operating System Architecture
OS. version	OS. version
File. separator	File. separator file delimiter ("/" in UNIX)
Path. separator	Path. separator path separator (":" in UNIX systems)
Line. separator	Line. separator line separator ("/n" in UNIX ")
User. name	User. name: Account name of the user
User. home	User. home user's home directory
User. dir	Current working directory of user. dir

One is to use the command line to obtain

Import java. io. bufferedReader; import java. io. inputStream; import java. io. inputStreamReader; import java.net. inetAddress; import java.net. networkInterface; import java. util. arrayList; import java. util. formatter; import java. util. list; import java. util. locale; import java. util. map; import java. util. properties; public class test {// obtain the computer configuration information (poor) by intercepting the cmd stream. public static List
  
   
GetIpAddress () {Process p = null; List
   
    
Address = new ArrayList
    
     
(); Try {p = new ProcessBuilder ("ipconfig", "/all "). start () ;} catch (Exception e) {return address;} StringBuffer sb = new StringBuffer (); // read the process output value InputStream inputStream = p. getInputStream (); BufferedReader br = new BufferedReader (new InputStreamReader (inputStream); String s = ""; try {while (s = br. readLine ())! = Null) {sb. append (s + "\ n") ;}} catch (Exception e) {e. printStackTrace ();} finally {try {inputStream. close ();} catch (Exception e) {e. printStackTrace () ;}} System. out. println (sb); return address;} public static void getIpconfig () {Map
     
      
Map = System. getenv (); System. out. println (map. get ("USERNAME"); // get the user name System. out. println (map. get ("COMPUTERNAME"); // obtain the computer name System. out. println (map. get ("USERDOMAIN"); // obtain the computer domain name} // obtain the computer ip address and mac address public static void getConfig () {try {InetAddress address = InetAddress. getLocalHost (); NetworkInterface ni = NetworkInterface. getByInetAddress (address); // ni. getInetAddresses (). nextElement (). getAddress (); Byte [] mac = ni. getHardwareAddress (); String sIP = address. getHostAddress (); String sMAC = ""; Formatter formatter = new Formatter (); for (int I = 0; I <mac. length; I ++) {sMAC = formatter. format (Locale. getDefault (), "% 02X % s", mac [I], (I <mac. length-1 )? "-":""). ToString ();} System. out. println ("IP:" + sIP); System. out. println ("MAC:" + sMAC);} catch (Exception e) {e. printStackTrace () ;}// obtain the computer's ip address, name, operating system name, operating system version public static void Config () {try {InetAddress addr = InetAddress. getLocalHost (); String ip = addr. getHostAddress (). toString (); // obtain the local ip String hostName = addr. getHostName (). toString (); // obtain the name of the local computer System. out. println ("local IP:" + ip + "\ n local name:" + hostName); Properties props = System. getProperties (); System. out. println ("operating system name:" + props. getProperty ("OS. name "); System. out. println ("OS version:" + props. getProperty ("OS. version ");} catch (Exception e) {e. printStackTrace () ;}// some other things, public static void all () {Properties props = System. getProperties (); System. out. println ("Java Runtime Environment version:" + props. getProperty ("java. version "); System. out. println ("Java Runtime Environment vendor:" + props. getProperty ("java. vendor "); System. out. println ("Java vendor URL:" + props. getProperty ("java. vendor. url "); System. out. println ("Java installation path:" + props. getProperty ("java. home "); System. out. println ("Java Virtual Machine Specification Version:" + props. getProperty ("java. vm. specification. version "); System. out. println ("Java virtual machine specification Supplier:" + props. getProperty ("java. vm. specification. vendor "); System. out. println ("Java virtual machine specification name:" + props. getProperty ("java. vm. specification. name "); System. out. println ("Java Virtual Machine implementation version:" + props. getProperty ("java. vm. version "); System. out. println ("Java Virtual Machine implementation vendor:" + props. getProperty ("java. vm. vendor "); System. out. println ("Java Virtual Machine implementation name:" + props. getProperty ("java. vm. name "); System. out. println ("Java Runtime Environment Standard Version:" + props. getProperty ("java. specification. version "); System. out. println ("Java Runtime Environment specification Supplier:" + props. getProperty ("java. specification. vender "); System. out. println ("Java Runtime Environment specification name:" + props. getProperty ("java. specification. name "); System. out. println ("Java class format version:" + props. getProperty ("java. class. version "); System. out. println ("Java class path:" + props. getProperty ("java. class. path "); System. out. println ("List of paths searched during Database loading:" + props. getProperty ("java. library. path "); System. out. println ("Default temporary file path:" + props. getProperty ("java. io. tmpdir "); System. out. println ("path of one or more extended directories:" + props. getProperty ("java. ext. dirs "); System. out. println ("operating system name:" + props. getProperty ("OS. name "); System. out. println ("Operating System Architecture:" + props. getProperty ("OS. arch "); System. out. println ("OS version:" + props. getProperty ("OS. version "); System. out. println ("file separator:" + props. getProperty ("file. separator "); // in unix System, it is"/"System. out. println ("path separator:" + props. getProperty ("path. separator "); //": "System. out. println ("line separator:" + props. getProperty ("line. separator "); //"/n "System in unix. out. println ("User Account name:" + props. getProperty ("user. name "); System. out. println ("Your home directory:" + props. getProperty ("user. home "); System. out. println ("current working directory of the User:" + props. getProperty ("user. dir ");} public static void main (String [] args) {getConfig (); Config (); all ();}}