Get System Properties

How to get System Properties using Applet Program
Eg(username) of the system

From applet, u cannot access some system properties... to do this u have to give permissions in java.policy file
arun

Similar Messages

How can I get system properties?

Hello,
How can I get the system properties like %JAVA_HOME% in my java codes, for example, I want to print it like this.
System.out.println("%JAVA_HOME%");
but it doesn't work!
Please give me a hand!

To pass the Operating system environment variable to the Java "environment variables", you have to explicitely pass them on the command line eg.
java -Dmyjava.home=%JAVA_HOME% myClass
then, in your code use
String JAVA_HOME = System.getProperty ( "myjava.home" );regards,
Owen

To jschell How to get data System properties by JNI and Runtime.exec()

Thank you very much for answer. ummm....but I'm can not gets data system properties by JNI or Runtime.exec(). Please help me. I'm want create Java-Applet for data System properties ( memory quantity?, Harddisk capacity?, CPU speed ?, Printer Name? and all hardwares ) in my computer. It very important for me. Help me please. thank you..

Java applets are restricted to accessing only some system properties - and it is good so. I would not be happy if any applet could inquire about, say, my user name or the amount of memory in my box.

Can i get the system properties(urgent)

Sir
i want to get the following properties of the system
1.What type of operating system install e.g win Xp or 98
2.How many hard disk are in the system
OR how many Partions of the system
3.Search the particular folder in the computer.
i study the System Class but these types of information
not available.Please Help me with Example.

Java Developer's Almanac 1.4:
// Get all system properties
Properties props = System.getProperties();
// Enumerate all system properties
Enumeration enum = props.propertyNames();
while(enum.hasMoreElements())
// Get property name
String propName = (String)enum.nextElement();
// Get property value
String propValue = (String)props.get(propName);
What's there, is there, what isn't, isn't. I believe there are many clues to what operating system you're on.
-Jason Thomas.

How to get the properties of my system ?

Hi,
does someone know how to get the properties of my system (like RAM,processor,OS ...) ?
Thanks, Fred.

Hi!
Try this:
import java.util.Properties;
public class Props {
     public static void main(String[] args) {
          // This shows all the properties
          System.getProperties().list(System.out);
          // This retrieves a special property
          System.out.println(System.getProperty("java.runtime.name"));
          // Here is to get total system memory
          long totalMemory = Runtime.getRuntime().totalMemory();
          System.out.println("Total memory: "+totalMemory);
          // Here is to get free system memory
          long freeMemory = Runtime.getRuntime().freeMemory();
          System.out.println("Free memory: "+freeMemory);
}Hope it helps!
/Andrew

Via APIs. how can I get weblogic specific system properties

I am looking to find out the API for enumerating over weblogic's system
properties. I would like to be able to find out things like the service
pack #, the class path it's using, etc. I've tried the
System.getProperties() but that only gets me java properties.
Thanks.

try getServletContext().getResourceAsStream("/index.html") where the filename should be givven relative to the web app root
try{
InputStream is = new BufferedInputStream(getServletContext().getResourceAsStream("/index.html"));
defaultProps.load(new FileInputStream("Intranet_Properties.props"));
finally {
if( is != null ){
is.close();
}

Where do I read in the documentation the list of the system properties?

Yep. Sounds stupid. But it's true. I read in all these forums where and how to set the truststore and so on but it would be beautiful to understand it my own.
1. First I read setting the -Djavax.net.ssl.trustStore in the VM arguments.
2. Then I find out the the -D is just for setting something like a static property.
3. Next I want to read about the system properties. Who, what and where the Java tries to get this system property. I do not find it.
What I find is great help in these forums and solving this kind of problems seems easy... I googled and the only place I found info about this is in a boulder.ibm.com site:
http://publib.boulder.ibm.com/infocenter/iseries/v5r4/index.jsp?topic=/rzaha/sysprop2.htm
http://publib.boulder.ibm.com/infocenter/iseries/v5r4/index.jsp?topic=/rzaha/rzahajssesysprops.htm
I also found some info on a sun tutorial but not an official documentation. Do you know where to find it? It seems that my learning is always about finding the right place to find information and not guessing and trying.
Thanks!!

Thanks for your soon reply. Yeah, I found that but I really was expecting a more serious documentation.
I have to admit that it is documented. Yes. But I didn't expect to find that in middle of a guide. But more in a reference or in a specification document. It's inside the "Customization" and in a table, yes... But it's a guide!!
I like Java but something to worry about is the "too many - too less" documentation. Documentation is not clear enough and all the hundreds of options you have can make the programming with Java no good. It would sound like a good thing have a lot of choices and hundreds of places to look info for but I am a bit disappointed with that. It's not clear enough to find the right info.
Anyway, thanks a lot for your help!! I will have to live with that.
Guide: http://java.sun.com/j2se/1.5.0/docs/guide/security/jsse/JSSERefGuide.html

System Properties user.timzone different between dev. and prod. system

Hi all,
I am facing the following issue:
In our development system I get in http://<server:port>/sap/monitoring/SystemProperties -> dispatcher -> system properties a Europe/Berlin for user.timezone.
In our productive system I get in http://<server:port>/sap/monitoring/SystemProperties -> dispatcher -> system properties a GMT for user.timezone.
Can anybody explain which system property is requested by the J2EE-engine when calling this property?
I ask, because I wrote a small programm requesting the user.property via java (expecting j2ee-engine would do that too) an got back an empty string (on both systems).
So, how/where can I change the parameter, so that the development system uses GMT, too?
I already checked the spro settings in sap, they are identical. System -> status showes the same for both systems, too.
I hope for your help.
Thanks and regards
Christian

Hello Chris,
I checked the system variables with TA SM51 ->goto -> server -> information -> environment.
There is nothing like the TZ variable on both systems (we use Linux).
Do you have an other idea?
How can I change the user.timezone shown in Java system properties?
Regards
Christian

How to access System properties in xml file

hi,
i want to read system properties in my xml file using ${} .
I tried it but did not find any way.But when i use log4j if i set some variable in
System properties that properties is read by the log4j.properties .
I am writing a simple program that read a xml properties file file
try {
            props   = new Properties();
            fis     = new FileInputStream(xmlFile);
            props.loadFromXML(fis);
}before reading this file i set some properties and accessing this properties from that xml .but i cant.
Thanks

sabre150 wrote:
fun_with_java wrote:
can you give some example?Not really - I would have to write the code for you and I'm not getting paid for writing your code.Thanks for your kindness.
I dont ask you to write the code.Need some help to start it .Actually i dont have knowledge that
whether xml file automatically read it or i have prase the system property manually. Now i got the way to
access system property in xml..
Ok thanks again..
Thanks & Regards

SSIS 2012 Script Task to Get File Properties

Hello,
I researched on how to grab a file properties such as file size, file modified date, etc and I came across the following
link:
I followed exact steps and when I went to execute the package, I got the following error:
Below is the code:
// C# code
// Fill SSIS variables with file properties
using System;
using System.Data;
using System.IO; // Added to get file properties
using System.Security.Principal; // Added to get file owner
using System.Security.AccessControl; // Added to get file owner
using Microsoft.SqlServer.Dts.Runtime;
using System.Windows.Forms;
namespace ST_cb8dd466d98149fcb2e3852ead6b6a09.csproj
[System.AddIn.AddIn("ScriptMain", Version = "1.0", Publisher = "", Description = "")]
public partial class ScriptMain : Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase
#region VSTA generated code
enum ScriptResults
Success = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Success,
Failure = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Failure
#endregion
public void Main()
// Lock SSIS variables
Dts.VariableDispenser.LockForRead("User::FilePath");
Dts.VariableDispenser.LockForWrite("User::FileAttributes");
Dts.VariableDispenser.LockForWrite("User::FileCreationDate");
Dts.VariableDispenser.LockForWrite("User::FileExists");
Dts.VariableDispenser.LockForWrite("User::FileInUse");
Dts.VariableDispenser.LockForWrite("User::FileIsReadOnly");
Dts.VariableDispenser.LockForWrite("User::FileLastAccessedDate");
Dts.VariableDispenser.LockForWrite("User::FileLastModifiedDate");
Dts.VariableDispenser.LockForWrite("User::FileOwner");
Dts.VariableDispenser.LockForWrite("User::FileSize");
// Create a variables 'container' to store variables
Variables vars = null;
// Add variables from the VariableDispenser to the variables 'container'
Dts.VariableDispenser.GetVariables(ref vars);
// Variable for file information
FileInfo fileInfo;
// Fill fileInfo variable with file information
fileInfo = new FileInfo(vars["User::FilePath"].Value.ToString());
// Check if file exists
vars["User::FileExists"].Value = fileInfo.Exists;
// Get the rest of the file properties if the file exists
if (fileInfo.Exists)
// Get file creation date
vars["User::FileCreationDate"].Value = fileInfo.CreationTime;
// Get last modified date
vars["User::FileLastModifiedDate"].Value = fileInfo.LastWriteTime;
// Get last accessed date
vars["User::FileLastAccessedDate"].Value = fileInfo.LastAccessTime;
// Get size of the file in bytes
vars["User::FileSize"].Value = fileInfo.Length;
// Get file attributes
vars["User::FileAttributes"].Value = fileInfo.Attributes.ToString();
vars["User::FileIsReadOnly"].Value = fileInfo.IsReadOnly;
// Check if the file isn't locked by an other process
try
// Try to open the file. If it succeeds, set variable to false and close stream
FileStream fs = new FileStream(vars["User::FilePath"].Value.ToString(), FileMode.Open);
vars["User::FileInUse"].Value = false;
fs.Close();
catch (Exception ex)
// If opening fails, it's probably locked by an other process
vars["User::FileInUse"].Value = true;
// Log actual error to SSIS to be sure
Dts.Events.FireWarning(0, "Get File Properties", ex.Message, string.Empty, 0);
// Get the Windows domain user name of the file owner
FileSecurity fileSecurity = fileInfo.GetAccessControl();
IdentityReference identityReference = fileSecurity.GetOwner(typeof(NTAccount));
vars["User::FileOwner"].Value = identityReference.Value;
// Release the locks
vars.Unlock();
Dts.TaskResult = (int)ScriptResults.Success;
Eventually I am looking to just grab the Modified Date from the Windows Explorer folder and insert into table. Any suggestions? Thank you in advance!
Sanjeev
Sanjeev Jha

Hi SSISJoost,
I am so glad you responded to this thread. You are absolutely right. I copied the entire code including the project name (guid) and that solved the error problem.
Now, what did you do to get the message box? I added the watch and I could see the values but how do I get these values in a table? If I remember correctly, in your blog, you mentioned something about using derived columns. I am familiar with Derived Columns
but how do I do that? I appreciate your response.
Thank you.
Sanjeev
Sanjeev Jha
I used a second script task to show all variable values. It has a
MessageBox in it and between all
variables I added a
newline to make it more readable...
But with an Execute SQL Task and parameters you can also put these values in a Table... or you can read the file in a Data Flow Task and add those variables (as metadata) to each record with a Derived Column
Please mark the post as answered if it answers your question | My SSIS Blog:
http://microsoft-ssis.blogspot.com |
Twitter

How to get system Hostname in java

Hi,
I am a java developer trying to get the hostname of the system from java class. Meaning want the value when i run the $hostname command in linux and my server is Linux server.
I am searching in the System Properties for the hostname but i could not get it
I am running IBM Websphere 5.2 and JDK 1.4.2 in my linux server.
Thanks for input
-AP

Try
package testing;
import java.net.*;
public class Test
public static void main(String[] args) throws UnknownHostException
System.out.println(InetAddress.getLocalHost().getHostName());
}

JMX question: how to retrieve system properties, DataSource attributes ?

Hi,
I need to retrieve some parameters from my JEE application (*.ear) my collegues will deploy soon on Netweaver 7.2
I found documentation about how to connect to the server with JMX, that works fine:
http://help.sap.com/saphelp_nw04/helpdata/en/64/617cfb94845d468b0498b4b2c53d74/content.htm
But how can I come to the system properties for example? Which ObjectName do I have to use and what methods should be called? Are there some more examples for common operations based on the default (monitoring) MBeans?
Thanx a lot,
Bob

http://www.dagira.com/2007/08/22/dynamic-dates-part-i-yesterday-and-today/
That blog post includes functions to get "today" for:
DB2     current date
Oracle     sysdate
Informix     TODAY
MySQL     CURDATE()
SQL Server     getdate()
Sybase     getdate()
Teradata     DATE or CURRENT_DATE
It is also the first in a series of posts that show you how to create other creative time objects for use in your universe. Hope this helps.

How do I set System properties within WL6.0?

I am setting WL6.0 up to have a startup class, but this class needs to
read system properties which have not yet been set. How do I set these
up within weblogic? I was able to get the startup class set up, but it
needs these system properties to continue.
gmo

Correct on all points. The one advantage of doing this in java is that you can more easily do more
complex things like accessing configuration information from a remote data store (like a database).
Dimitri Rakitine wrote:
These are not needed if you simply replace java ...lots of options... weblogic.Server with
java ...lots of options... startmyWLS in the script which starts WebLogic, but, on the other
hand, this solution is no different from simply adding -DmyProperty=myValue to the startup script
(I think that the ultimate goal is the ability to deploy(and redeploy!) components,
without any mods to the particular vendor's startup scripts of anything of that nature).
Kumar Allamraju <[email protected]> wrote:
Thanks to robert for a quick workaround..
I tried to start the WLS with the following piece of code and actually i need to set
some additional properties
for successful server startup.
Here it is
import java.util.Properties;
public class startmyWLS
public static void main(String[] args)
Properties props = System.getProperties();
props.put("myProperty", "myValue");
props.put("bea.home", "E:\\bea");
props.put("weblogic.Domain", "mydomain");
props.put("weblogic.Name", "myserver");
props.put("java.security.policy",
"E:\\bea\\wlserver6.0\\lib\\weblogic.policy");
System.setProperties(props);
weblogic.Server.main(args);
Make sure you run this from E:\bea\wlserver6.0., as it tries to read config.xml
config\[your-domain-name] from this
directory.
Kumar
Robert Patrick wrote:
import java.util.Properties;
public class StartMyWebLogicServer
public static void main(String[] args)
Properties props = System.getProperties();
props.put("myProperty", "myValue")
System.setProperties(props);
weblogic.Server.main(args);
gmo wrote:
That won't work since it has to be 'outside' of the code. It's a service, and
services are started when weblogic is started up, not when I call a bean.
And it has to be dynamic, since the properties will vary on evry installation.
Robert Patrick wrote:
You can also use System.setProperty() or a combination of
System.getProperties() followed by a System.setProperties()...
gmo wrote:
They are not normal system properties. I'm using some open source code, and
it requires settings to be system properties, but they are specific to the
application, which means that they are not already in the system
properties. I know how to get them, and after some more research, you can
set them on the command line when starting up weblogic. However, is this
the best way to set system properties?
Robert Patrick wrote:
What "system properties" are you trying to find?
gmo wrote:
I am setting WL6.0 up to have a startup class, but this class needs to
read system properties which have not yet been set. How do I set these
up within weblogic? I was able to get the startup class set up, but it
needs these system properties to continue.
gmo
Dimitri

Getting System Path in Java?

Is there any way of getting the system PATH in Java? I looked at the System Properties, but it doesn't seem to be in there.
Thanx in advance.

Is there any way of getting the system PATH in Java?
I looked at the System Properties, but it doesn't
seem to be in there.
Thanx in advance.Do you mean your application's run path, or something else?
You can get the application path like this:
String strAppPath = System.getProperty("user.dir");
Alpha75

How to get system Environment variable?

How to get system Environment variable without using jni?
just like "JAVA_HOME" or "PATH"...
Any reply is help to me!! :-)

Thx for your reply...
I get it!!!
Read environment variables from an application
Start the JVM with the "-D" switch to pass properties to the application and read them with the System.getProperty() method. SET myvar=Hello world
SET myothervar=nothing
java -Dmyvar="%myvar%" -Dmyothervar="%myothervar%" myClass
then in myClass String myvar = System.getProperty("myvar");
String myothervar = System.getProperty("myothervar");
This is useful when using a JAVA program as a CGI.
(DOS bat file acting as a CGI) java -DREQUEST_METHOD="%REQUEST_METHOD%"
-DQUERY_STRING="%QUERY_STRING%"
javaCGI
If you don't know in advance, the name of the variable to be passed to the JVM, then there is no 100% Java way to retrieve them.
NOTE: JDK1.5 provides a way to achieve this, see this HowTo.
One approach (not the easiest one), is to use a JNI call to fetch the variables, see this HowTo.
A more low-tech way, is to launch the appropriate call to the operating system and capture the output. The following snippet puts all environment variables in a Properties class and display the value the TEMP variable. import java.io.*;
import java.util.*;
public class ReadEnv {
public static Properties getEnvVars() throws Throwable {
Process p = null;
Properties envVars = new Properties();
Runtime r = Runtime.getRuntime();
String OS = System.getProperty("os.name").toLowerCase();
// System.out.println(OS);
if (OS.indexOf("windows 9") > -1) {
p = r.exec( "command.com /c set" );
else if ( (OS.indexOf("nt") > -1)
|| (OS.indexOf("windows 2000") > -1 )
|| (OS.indexOf("windows xp") > -1) ) {
// thanks to JuanFran for the xp fix!
p = r.exec( "cmd.exe /c set" );
else {
// our last hope, we assume Unix (thanks to H. Ware for the fix)
p = r.exec( "env" );
BufferedReader br = new BufferedReader
( new InputStreamReader( p.getInputStream() ) );
String line;
while( (line = br.readLine()) != null ) {
int idx = line.indexOf( '=' );
String key = line.substring( 0, idx );
String value = line.substring( idx+1 );
envVars.setProperty( key, value );
// System.out.println( key + " = " + value );
return envVars;
public static void main(String args[]) {
try {
Properties p = ReadEnv.getEnvVars();
System.out.println("the current value of TEMP is : " +
p.getProperty("TEMP"));
catch (Throwable e) {
e.printStackTrace();
Thanks to W.Rijnders for the W2K fix.
An update from Van Ly :
I found that, on Windows 2003 server, the property value for "os.name" is actually "windows 2003." So either that has to be added to the bunch of tests or just relax the comparison strings a bit: else if ( (OS.indexOf("nt") > -1)
|| (OS.indexOf("windows 2000") > -1 )
|| (OS.indexOf("windows 2003") > -1 ) // works but is quite specific to 2003
|| (OS.indexOf("windows xp") > -1) ) {
else if ( (OS.indexOf("nt") > -1)
|| (OS.indexOf("windows 20") > -1 ) // probably is better since no other OS would return "windows" anyway
|| (OS.indexOf("windows xp") > -1) ) {
I started with "windows 200" but thought "what the hell" and made it "windows 20" to lengthen its longivity. You could push it further and use "windows 2," I suppose. The only thing to watch out for is to not overlap with "windows 9."
On Windows, pre-JDK 1.2 JVM has trouble reading the Output stream directly from the SET command, it never returns. Here 2 ways to bypass this behaviour.
First, instead of calling directly the SET command, we use a BAT file, after the SET command we print a known string. Then, in Java, when we read this known string, we exit from loop. [env.bat]
@set
@echo **end
[java]
if (OS.indexOf("windows") > -1) {
p = r.exec( "env.bat" );
while( (line = br.readLine()) != null ) {
if (line.indexOf("**end")>-1) break;
int idx = line.indexOf( '=' );
String key = line.substring( 0, idx );
String value = line.substring( idx+1 );
hash.put( key, value );
System.out.println( key + " = " + value );
The other solution is to send the result of the SET command to file and then read the file from Java. ...
if (OS.indexOf("windows 9") > -1) {
p = r.exec( "command.com /c set > envvar.txt" );
else if ( (OS.indexOf("nt") > -1)
|| (OS.indexOf("windows 2000") > -1
|| (OS.indexOf("windows xp") > -1) ) {
// thanks to JuanFran for the xp fix!
p = r.exec( "cmd.exe /c set > envvar.txt" );
// then read back the file
Properties p = new Properties();
p.load(new FileInputStream("envvar.txt"));
Thanks to JP Daviau
// UNIX
public Properties getEnvironment() throws java.io.IOException {
Properties env = new Properties();
env.load(Runtime.getRuntime().exec("env").getInputStream());
return env;
Properties env = getEnvironment();
String myEnvVar = env.get("MYENV_VAR");
To read only one variable : // NT version , adaptation for other OS is left as an exercise...
Process p = Runtime.getRuntime().exec("cmd.exe /c echo %MYVAR%");
BufferedReader br = new BufferedReader
( new InputStreamReader( p.getInputStream() ) );
String myvar = br.readLine();
System.out.println(myvar);
Java's System properties contains some useful informations about the environment, for example, the TEMP and PATH environment variables (on Windows). public class ShowSome {
public static void main(String args[]){
System.out.println("TEMP : " + System.getProperty("java.io.tmpdir"));
System.out.println("PATH : " + System.getProperty("java.library.path"));
System.out.println("CLASSPATH : " + System.getProperty("java.class.path"));
System.out.println("SYSTEM DIR : " +
System.getProperty("user.home")); // ex. c:\windows on Win9x system
System.out.println("CURRENT DIR: " + System.getProperty("user.dir"));
Here some tips from H. Ware about the PATH on different OS.
PATH is not quite the same as library path. In unixes, they are completely different---the libraries typically have their own directories. System.out.println("the current value of PATH is: {" +
p.getProperty("PATH")+"}");
System.out.println("LIBPATH: {" +
System.getProperty("java.library.path")+"}");
gives the current value of PATH is:
{/home/hware/bin:/usr/local/bin:/usr/xpg4/bin:/opt/SUNWspro/bin:/usr/ccs/bin:
/usr/ucb:/bin:/usr/bin:/home/hware/linux-bin:/usr/openwin/bin/:/usr/games/:
/usr/local/games:/usr/ccs/lib/:/usr/new:/usr/sbin/:/sbin/:/usr/hosts/:
/usr/openwin/lib:/usr/X11/bin:/usr/bin/X11/:/usr/local/bin/X11:
/usr/bin/pbmplus:/usr/etc/:/usr/dt/bin/:/usr/lib:/usr/lib/lp/postscript:
/usr/lib/nis:/usr/share/bin:/usr/share/bin/X11:
/home/hware/work/cdk/main/cdk/../bin:/home/hware/work/cdk/main/cdk/bin:.}
LIBPATH:
{/usr/lib/j2re1.3/lib/i386:/usr/lib/j2re1.3/lib/i386/native_threads:
/usr/lib/j2re1.3/lib/i386/client:/usr/lib/j2sdk1.3/lib/i386:/usr/lib:/lib}
on my linux workstation. (java added all those execpt /lib and /usr/lib). But these two lines aren't the same on window either:
This system is windows nt the current value of PATH is:
{d:\OrbixWeb3.2\bin;D:\jdk1.3\bin;c:\depot\cdk\main\cdk\bin;c:\depot\
cdk\main\cdk\..\bin;d:\OrbixWeb3.2\bin;D:\Program
Files\IBM\GSK\lib;H:\pvcs65\VM\win32\bin;c:\cygnus
\cygwin-b20\H-i586-cygwin32\bin;d:\cfn\bin;D:\orant\bin;C:\WINNT\system32;C:\WINNT;
C:\Program Files\Dell\OpenManage\Resolution Assistant\Common\bin;
d:\Program Files\Symantec\pcAnywhere;
C:\Program Files\Executive Software\DiskeeperServer\;C:\Program Files\Perforce}
LIBPATH:
{D:\jdk1.3\bin;.;C:\WINNT\System32;C:\WINNT;d:\OrbixWeb3.2\bin;D:\jdk1.3\bin;
c:\depot\cdk\main\cdk\bin;c:\depot\cdk\main\cdk\..\bin;
d:\OrbixWeb3.2\bin;D:\Program Files\IBM\GSK\lib;
H:\pvcs65\VM\win32\bin;c:\cygnus\cygwin-b20\H-i586-cygwin32\bin;d:\cfn\bin;
D:\orant\bin;C:\WINNT\system32;
C:\WINNT;C:\Program Files\Dell\OpenManage\ResolutionAssistant\Common\bin;
d:\Program Files\Symantec\pcAnywhere;
C:\Program Files\Executive Software\DiskeeperServer\;C:\Program Files\Perforce}

Get System Properties

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