Controling windows volume from java

Hi! Firstable, sorry for my English.
My question is very simple
How can I control windows' volume from java?
I've searched everywhere, but I found nothing.
JMF did not help me, I just could control a line, but I want to control the master volume of my pc.
Thanks in advance...

If you can identify a Windows command that does what you want, then you can execute it using Java's ProcessBuilder class nethods. If not, you can use Java Native Interface (JNI) or one of its variations to create an interface from Java to C/C++ code in Windows.

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Start and Stop a Windows Service From Java

Is there any way to start and stop a Windows service from Java? The only post I found on it (http://forum.java.sun.com/thread.jspa?threadID=647509) had a link to one of the many aps that allow Java programs to be services, which is not what I am interested in doing.
I am attempting to get data from performance counters from the Windows Performance Monitor into a Java ap without using JNI. I can get the data from C++ or a .net language pretty easily and was going to create a service that would listen for socket requests and feed back the data. However, I'd like to start and stop that service when my java code starts and stops. Is this possible? Would it make more sense to just use a .exe and Runtime.exec()?

If it's only to start or stop a service then you could use the net command without any need for JNI.import java.io.*;
public class MsWinSvc {
    static final String CMD_START = "cmd /c net start \"";
    static final String CMD_STOP = "cmd /c net stop \"";
    public static int startService(String serviceName) throws Exception {
        return execCmd(CMD_START + serviceName + "\"");
    public static int stopService(String serviceName) throws Exception {
        return execCmd(CMD_STOP + serviceName + "\"");
    static int execCmd(String cmdLine) throws Exception {
        Process process = Runtime.getRuntime().exec(cmdLine);
        StreamPumper outPumper = new StreamPumper(process.getInputStream(), System.out);
        StreamPumper errPumper = new StreamPumper(process.getErrorStream(), System.err);
        outPumper.start();
        errPumper.start();
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        outPumper.join();
        errPumper.join();
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    static class StreamPumper extends Thread {
        private InputStream is;
        private PrintStream os;
        public StreamPumper(InputStream is, PrintStream os) {
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I can't control the volume from my iphone 4 headset. What can I do???

I can't control the volume from my iphone 4 headset. What can I do???

Go to Settings > Sounds. There is this option call Change With Buttons. Is it On or Off?

Configuring Windows Scheduler from Java Class

Hi Frnds ,
Is it possible to configure or create a task in Windows Scheduler from a Java program .
If so ,please let me know how we can do so .
Thanks ,
Rajesh Reddy

Without claimimng any hands-on experience with this, google for "windows scheduler command line".
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Querying windows service from Java

Hi All,
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would really appreciate a response.

Is query this from java Runtime.exec and from command prompt different? My code creates a string of sc \\<server> query W3SVC and calls this like:               String cmd = "sc "+ " \\\\ " + serverIPOrHostName + "query"+ service;
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I happened to check out one site http://www.kbalertz.com/kb_Q323790.aspx where it says that "The File and Printer Sharing for Microsoft Networks component must be turned on for many remote-management functions to work. "
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thanks,
Dilip
PS: Thanks for looking into the mail and responding.

Controlling external programs from Java

Hi,
I try to invoke an external command-line program in Windows 2000 fron Java. I do this by
Process proc = Runtime.getRuntime().exec(cmd);
cmd is a String representing a command. For instance I try to control the gnupg program by
"cmd /c C:\\gnupg\\gpg --list-keys"
This works fine. But when I want to make a more advanced control, when gnupg waits for more than one input, and that input can't be put on the same line I get problems.
When running gpg --edit-key SomeKey on the command line I have to enter
trust - return - 5 - return - yes - return - quit
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this is how to do it! gotta listen to the output to prevent deadlock. you can pass in parameters o the initial call as well (a string array, where string[0] = command, string[...] = input argument) or write it to the output stream of the process.
hope this helps
public void run_command(String starting_command, String[] further_commands)
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PrintWriter writer = new PrintWriter(new OutputStreamWriter(proc.getOutputStream()));
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public class Listener extends Runnable
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public static void make(InputStream in)
Listener l = new Listener(in);
Thread thread = new Thread(l);
thread.start();
public Listener(InputStream in)
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String string;
while(true)
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Controlling a browser from java

hello experts,
i want to open an web dynpro URL in a browser and navigate through the URL , like putting values in the input box and click the buttons from java code .
Actually it is exactly like an automated test tool in java to navigate and render the given web dynpro URL with the test data given.
its very please help.
Regards,
Karthik

Hello Karthik,
I'm using Selenium to do something similar. You can find more information at http://seleniumhq.org/
The documentation can be found at http://seleniumhq.org/documentation/ and you can find a tutorial implementation for Java at http://seleniumhq.org/documentation/tutorials/
You can use a new Java Project to start using Selenium, just in case you feel confused.
I've been using Selenium for some time now, you will learn some tricks during the way. And you'd probably take a look on waitForCondition function, since you'd need some calls in order to wait for webdynpro ajax requests to populate tables (before doing your assertions).
Hope it helps.
Regards,
Daniel

Monitoring windows services from JavaI Know how to

I know how to start and stop services in java, but how can I see if a process is already stared or is starting?
Thx

You'll need to make a call to a suitable Windows program using Runtime or ProcessBuilder methods, or use JNI (Java Native Interface.) From Wikipedia:
(JNI) is a programming framework that allows Java code running in the Java virtual machine (JVM)
to call and be called[1] by native applications (programs specific to a hardware and operating system
platform) and libraries written in other languages, such as C, C++ and assembly.

Calling windows programs from Java

Hello,
I need to find how to call and pass parameters to windows programs. Specifically I need to call MS Sql server, there is call that I can do from command promt but I would like to give it some GUI interface and ease of use so I could pass some parameters to the program and execute it.
Thanks.

Hi thanks for all replies !
Ok let me explain more about my problem.
I have a SQL server which runs on MS machine and there is thousands of stored procs that my be recreated once in a while from a directorys. So we have scripts which we have to manually update every time new stored proc is written and run against the server to update all of them at one batch.
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Handling an external (Windows) process from Java.

There is an example program in the 3rd edition of "The Java Language" by Gosling, et. al. The example is a simplified shell to handle an external executable. This is the code:
public static Process userProg(String cmd) {
    Process child = Runtime.getRuntime().exec(cmd);
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String[] cmdLine = {"ls", "-l" "dir"};
Runtime.getRuntime().exec(cmdLine);
...But none of them control an external application like ftp that require an interactive session. If anyone can point me towards a book, website url, example here at Sun, I'd appreciate it but it needs to be an example that controls an external executable through input and output. Thanks.
-John

OK.
This is not exactly an "example"; it is actual code from a production program. Names have been changed to protect proprietary info, so it is not clear that this will even compile. (Also: I would write this differently today, so please don't show this to anyone:-)
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o The server is proprietary, so you can't see it.
o The scripting language is proprietary, so you can't see it.
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o If the script terminated with an end, then the server process would exit.
o What the server "said" in response was controlled by print statements in the script it was fed.
Note the goofy print statements that allow my client to detect when the server completed a given transmission.
import java.util.Enumeration;
import java.util.Vector;
import java.io.*;
import Logger;
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public class ServerAccess {
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               String line;
               while ((line = b.readLine()) != null) {
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               Logger.logAlways("ServerAccess: Couldn't terminate server. " + e.toString());
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      * Test method.
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          // Create test script.
          Vector script = new Vector();
          script.add(....);
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          // Write script to server process.
          Writer w = new Writer(p.getOutputStream());
          w.init(script);
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          try {
               String line;
               while (true) {
               line = b.readLine();
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                    break;
                    System.out.println(line);
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               System.err.println(e.toString());
     * Test.
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        ServerAccess a = new ServerAccess();
          try {
               a.init();
          catch(Exception e) {
            System.err.println(e.toString());
            return;
        a.runTest();
        a.terminate();
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    private Process p = null;
     String END_OF_PACKAGE = "END_OF_CONTENT";
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Run windows services from java application

can java application run a windows server
i have a web server that runing using tomcat and mysql
can i make a icon in the systray
that give me the option to (using a menu)
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and write the systray application using java,
the systray application should acces window services ,
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what happend on a machine thar runs linux?
thanks
shay

Ok .so it's will be a diffrent way under linux..
for systray i will use http://systray.sourceforge.net/
and for services i'll use the
"net start <Service>" and "net stop service"
i need to keep track on the service status
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Can Mac OS X control sound volume from the bash shell?

hi!
first time ever that i ask in a forum something....
I wanted to know if there was something that looked like the amixer function for linux. I want to control the overall output volume of my audio card, without using AppleScript. I tried to look for something on the net, but all i was getting was just useful (and a lot) for Applescript. I was wondering if there is something that could be done with the terminal commands.
Thanks

Try using a Terminal command such as:
osascript -e 'set volume 1'
(28042)

Spawning Windows commands from Java not working ...?

Using either ProcessBuilder nor Runtime.getRuntime() to invoke the WinXP xcopy command is failing.
The xcopy command starts then unexpectedly stops never returning to the process.waitfor
The command working from the command line just fine.
Here is a the interesting bit of the code:
final String cmd = "xcopy /E /C /I /R /Y " + cpy_from + " " + install_folder;
//final String cmd = "SCOT_Post_Install.bat";
//Folder creation
try
scot_installer.log("xcopy: " + "Copying student stations");
String station_num = "" + i;
String[] commands = {"cmd", "/c", cmd, station_num};
scot_installer.log("xcopy: Attempting to invoke: " + cmd);
Process p = Runtime.getRuntime().exec(commands);
p.waitFor();
log ("Exit value of process: " + p.exitValue());
//p.destroy();
//p = null;
   catch (Exception ex)
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   All I can guess is that there is a lot to copy and the there is a memory issue with the command.
The "xcopy" command starts out looking "normal" in the task manager ...
then xcopy command looks like a zombie process in the task manager.
The memory is stable and it uses no significant CPU time
Also, I noticed when I killed the running process through Netbeans -- the xcopy command became "freed up" to finish.
But, of course, this does me no good because there are a lot more copies I need to make.

vulpes123 wrote:
Using either ProcessBuilder nor Runtime.getRuntime() to invoke the WinXP xcopy command is failing.
The xcopy command starts then unexpectedly stops never returning to the process.waitfor
The command working from the command line just fine.
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Kaj

Execute windows ping from java....

Why don't work �?�?�?
import java.io.*;
class runtime{
public static void main(String Arg[]) throws IOException
Runtime r=Runtime.getRuntime();
Process p= null;
try{
p=r.exec("ping.bat") ;
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}catch(Exception e){ System.out.println("Error al ejecutar la instrucci�n");}
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here's an example:
public int someCall() throws Exception
Process p;
int intResult;
String strExec = new String("ping java.sun.com");
p=Runtime.getRuntime().exec(strExec); // start the process
// now set something up that scans for output (independently)
MGStreamGobbler mgSGErrors = new MGStreamGobbler(p.getErrorStream(),"error ");
MGStreamGobbler mgSGOutput = new MGStreamGobbler(p.getInputStream(),"output ");
// start the somethings
mgSGErrors.start();
mgSGOutput.start();
// now wait for the actual process to end, wait for it's result
intResult=p.waitFor();
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the StreamGobbler class - it's simple, it just waits for input and writes it,
with a prefix, to System.out - feel free to redirect elsewhere:
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InputStream isSource;
String strType;
OutputStream osGoal;
MGStreamGobbler(InputStream isParSource, String strParType)
isSource=isParSource;
strType=strParType;
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try
InputStreamReader isrSource = new InputStreamReader(isSource);
BufferedReader brSource = new BufferedReader(isrSource);
String strLine=null;
while ( (strLine = brSource.readLine()) != null)
System.out.println(strType + ">" + strLine);
} catch (Exception ex)
System.out.println(" "+ex.toString());
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How to restart windows (any) from java program

What is the system program that I have to call in order to restart windows...
Runtime.getRuntime().exec(???);

I hope your app is first asking the user for
permission to do that first. Otherwise be prepared to
be smacked upside the head with a smelly sock when
you reboot when the user really really really didn't
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Controling windows volume from java

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