System information through java

To find the following info. What and all required, and how to implement in java..please give idea..or some tool or open source
1) Physical memory(installed)
2) CPU Speed(current)
3) Available disk space(primary partition)
4) Operation system, version and service pack
thank in advance..

System.getProperty("os.name"); and so on. Read the documentation of package java.lang.System

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hi ,
How can i get the information about the current operating system on which i am working through the java application.

System.getProperties() and look through the results. All kinds of interesting stuff in there.

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give me a idia with example.
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There isn't any core Java API for this. Use JNI or call an external process with Runtime.exec().
~

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Hello,
Can We Get System Information Like Motherboard,CPU,RAM,HardDisk etc.... IN JAVA???
Thank-You

On windows you can run a VB script which obtains this information.
On UNIX you can read files in the /proc and run df to get the disk sizes.
It is fairly rare that you need to obtain this information and if you do there are plenty of free and commercial products which do this already, so there is little point writing your own.

Accessing CPU clocks or system timers through java

Hello ,
We want to get access to system CPU clock which should run even when the system is shutdown. Additionally first time it should be set by a java program and it should run for some specific days amount of time . It should remain unaffected if the external user changes the system time displayed. Can it be possible through any means in java ???

Hi
we are designing an application which should run only for 15 consecutive days,we dont want the user to hack it by any means by changing the system time,so we want to have access to the system time which works with the help of battery backup or some other means by which we can detect whether the user has altered the system time.

System calls through Java stored Proc

Hi,
Aim: Execute host command from pl/sql thru java stored proc.
1. Created a java class to take system command that could be executed.
2. It runs fine when the class file is executed.
3. when the java file is loaded to database to access it as java stored proc, for any valid and invalid system commands it is giving out 'PL/SQL successfully completed.
Results were not seen.
4. Java source file.
import java.io.*;
import java.lang.*;
public class Util extends Object
public static int RunThis(String[] args) {
Runtime rt = Runtime.getRuntime();
int rc = -1;
String s = null;
try
Process p = rt.exec(args);
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream()));
// read the output from the command
System.out.println("Here is the standard output of the command:\n");
while ((s = stdInput.readLine()) != null) {
System.out.println(s);
// read any errors from the attempted command
System.out.println("Here is the standard error of the command (if any):\n");
while ((s = stdError.readLine()) != null) {
System.out.println(s);
System.exit(0);
catch (Exception e){
e.printStackTrace();
rc = -1;
finally {
return rc;
public static void main(String[] args){
Util.RunThis(args);
public static String exec(String args){
Util.RunThis(args);
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executed successfully,
$ /opt/java1.3.1/bin/java Util /usr/bin/ls -l
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total 30862
-rwxrwxrwx 1 xyz develope 1348218 Jan 2 17:47 02Jan03-2.zip
-rw-r----- 1 xyz develope 21864 Jul 9 2002 109-60_2_modified7.sql
-rw-r----- 1 xyz develope 44934 Jul 9 2002 109-60_2_modified8.sql
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xyz@xxxxx:abcd:/home/xyz
$
6. loadjava,
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SQL> create procedure echo_input(s1 varchar2) as language java name 'Util.main(java.lang.String[])';
2 /
Procedure created.
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SQL> exec echo_input('/usr/bin/ls -l');
PL/SQL procedure successfully completed.
SQL> exec echo_input('/home/o_report/reports/rcli_ASCT &');
PL/SQL procedure successfully completed.
SQL> set serverout on
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PL/SQL procedure successfully completed.
SQL> exec echo_input('ddsafafasf');
PL/SQL procedure successfully completed.
TIA,
Srini.

Hi Srini,
This is just a suggestion, but try entering the following commands (in your SQL*Plus session) before executing your stored procedure:
set serveroutput on size 1000000
exec dbms_java.set_output(1000000)Hope this helps.
Good Luck,
Avi.

How to access system registry through java program

Friends
I have to access System registry of Windows 2000 by Java program. I don't know how to access the registry by using java code. Please help me. Else
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I don't know how to access the registry
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This is one, there are others, do a Google search:
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Hi
Any one know how to get remote machine information,
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Regards,
Shivakumar Thota

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You could run Runtime.exec() to execute a command such as VBScipt to do it.
Other than that you may have to take a look at Java Native Interface(JNI) that will basically take control of doing anything you need.
Also, You may want to post this in "New To Java" or some other forum other than Java Web Start. You'll get more people to help ya.
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Getting system information

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import java.util.*;
public class SystemProperties{
     Properties properties_properties1;
     String string_name;
     String string_value;
     public SystemProperties(){
     public void get(){
          this.properties_properties1=System.getProperties();
          this.properties_properties1.list(System.out);
     public static void main(String[] args){
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Use above code to list the system properties.
Manu

Get system information

im fairly new at using java so my question is...
how can i get the system information using java?
the system information i want to get are the following:
number of processors
processor speed
memory
hard disk space
i would want to be able to get those in any system.
Thanks for your help.

Language again, Like I care.
How did I break the rules. Quote:
Is there complete
document of all classes and methods in java in a book
format not electronic?Posting a question like that in an unrelated thread that isn't even yours is annoying.

Error while trying to access system information for AS Java

Hi,
I´m not sure if this is the correct forum so if I'm wrong please let me know to move it to the correct one.
We are facing an extrange behavior when trying to access System Information in an AS Java, every time we try to access the link the following error shows up:
Error - ID018236: Cannot instantiate bean. java.lang.ClassNotFoundException: com.sap.engine.monitor.infoapp.SystemInfo
the complete error shows:
Found in negative cache -
Loader Info -
ClassLoader name: sap.com/tc~monitoring~systeminfo Parent loader name: References: common:service:http;service:servlet_jsp service:ejb common:service:iiop;service:naming;service:p4;service:ts service:jmsconnector library:jsse library:servlet common:library:IAIKSecurity;library:activation;library:mail;library:tcsecssl library:ejb20 library:j2eeca library:jms library:opensql common:library:com.sap.security.api.sda;library:com.sap.security.core.sda;library:security.class;library:webservices_lib;service:adminadapter;service:basicadmin;service:com.sap.security.core.ume.service;service:configuration;service:connector;service:dbpool;service:deploy;service:jmx;service:jmx_notification;service:keystore;service:security;service:userstore interface:resourcecontext_api interface:webservices interface:cross interface:ejbserialization library:tcjmx library:sapxmltoolkit library:tcSLUTIL Resources: /usr/sap/QBW/DVEBMGS03/j2ee/cluster/server0/apps/sap.com/tcmonitoringsysteminfo/servlet_jsp/sap/monitoring/root/WEB-INF/classes /usr/sap/QBW/DVEBMGS03/j2ee/cluster/server0/apps/sap.com/tcmonitoringsysteminfo/servlet_jsp/sap/monitoring/root/WEB-INF/lib/jstartupapi.jar /usr/sap/QBW/DVEBMGS03/j2ee/cluster/server0/apps/sap.com/tcmonitoringsysteminfo/servlet_jsp/monitoring/root/WEB-INF/classes /usr/sap/QBW/DVEBMGS03/j2ee/cluster/server0/apps/sap.com/tcmonitoringsysteminfo/servlet_jsp/monitoring/work /usr/sap/QBW/DVEBMGS03/j2ee/cluster/server0/apps/sap.com/tcmonitoringsysteminfo/servlet_jsp/sap/monitoring/work /usr/sap/QBW/DVEBMGS03/j2ee/cluster/server0/apps/sap.com/tcmonitoring~systeminfo/servlet_jsp/sap/monitoring/root/WEB-INF/lib/jstartupimpl.jar Loading model: {parent,references,local} -
Any idea about what is happening is appreciated.

check with this links too
http://hostname:port/sap/monitoring/SystemInfo
http://hostname:port/monitoring/SystemInfo
Implementing this note should solve your problem
Note 1281251 - System information exception: Connection is invalid
and also check
Note 1233282 - Fixed URL of System Information application on Start page
Thanks,
Surendra

System information through java

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