Running a Linux application from Java

Hy,
I am working at a faculty project and I need your help
What I want to do is by clicking a button, in a JFrame I want to open an application ,for example Mysql Query browser. I am using FC 6 and Netbeans 5.5
Can you help me??
Thanks

can I open the konsole from java??Yes.
First you must figure out how to do that from the command line yourself. That has nothing to do with java.
Note that that how you do that MUST account for the fact that the "command line" is actually a shell. Some commands must be run by running the shell as the actual command and then passing the desired command as an option to the shell (the actual command.)
Again you can google for examples.

Similar Messages

Running JMS simple application from java standalone program stucks

Hi All, i`m new to JMS service, and tried to code a simple application from the J2EE guide. They use standalone j2ee client application there, and i did not
dound any way to debug it from eclipse .. so i have coded following standalone app (not j2ee client JAR) to produce simple messages
public class producerMain {
     public static void main(String argv[]) throws NamingException, JMSException
          Properties jndiProp = new Properties();
          jndiProp.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY,"com.sun.enterprise.naming.SerialInitContextFactory");
          jndiProp.put(javax.naming.Context.PROVIDER_URL, "localhost:3920");
          InitialContext context =new InitialContext(jndiProp);
          ConnectionFactory factory = (ConnectionFactory)context.lookup("sashaConnectionFactory");
          Queue queue = (Queue)context.lookup("jms/Queue");
          System.out.println("Got here");
          Connection connection = factory.createConnection();
Session session = connection.createSession(
false,
Session.AUTO_ACKNOWLEDGE);
MessageProducer producer = session.createProducer(queue);
TextMessage message = session.createTextMessage();
for (int i = 0; i < 5; i++) {
message.setText("This is message " + (i + 1));
System.out.println("Sending message: " + message.getText());
producer.send(message);
producer.send(session.createMessage());
producer.close();
session.close();
connection.close();
factory = null;
     context.close();
     System.out.println("Quiting application");
application works .. it sends a messages .. but it does not quit .. (dozens of new threads get opened, besides the main thread, which quits, but other threads
does not quit .. and the application stucks .. )
Does anyone know, why does it stuck .. what are those threads ? and why does not they finish ?
Thanks, Regards Sasha.

Thanks.
changing to
exp.append("\n");and flushing the writer stream and closing the stream fixed the problem.
Why do we have to flush the stream?
and, why do we have to close the writer before reading? what if I want to continue writting in to the writer?
thanks again.

Running a linux process from java

hi,
               Process child = Runtime.getRuntime().exec("top -n 1 | grep Cpu");
               // hook up child process output to parent
               InputStream lsOut = child.getInputStream();
               InputStreamReader r = new InputStreamReader(lsOut);
               BufferedReader in = new BufferedReader(r);
                       line = in.readLine();If i run the command (top -n 1 | grep Cpu) on linux box it gives a line output. When i run the above prog( which also runs the same command) on the same linux machine the line is always read as null.
not sure where i m doing mistake. Please help.
--ravi

[email protected] wrote:
it still doesnt work. I also tried the below way still no luck
Process child = Runtime.getRuntime().exec(new String[]{"bash","-c","top -n 1","| grep Cpu"});Compare this with the code you've been given above. It's NOT the same.
Also: Why not leave the "grep" out and manually filter the input you get in your program? Then you don't need to worry about the shell and a simply "grep" is easily implemented in Java.

Unable to execute Linux command from Java

Hi,
I am currently working on a code wherein i need to execute Linux command from Java. Below are some of the query i have.
1) Is there any efficient method of running OS commands from Java, rather than using Runtime and Process method.
2) Below is details of my code which fails in execution
**-- Java Version**
java version "1.6.0"
OpenJDK Runtime Environment (build 1.6.0-b09)
OpenJDK Server VM (build 1.6.0-b09, mixed mode)
-- Program Code ----
Where <path> = Path i put myself
package test;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.*;
public class GetInode{
     * @param args
     public static void main(String[] args) {
          GetInode test = new GetInode();
          test.getInode();
     public void getInode(){
          String command = "/usr/bin/stat -Lt <path>;
          System.out.println(command);
          Process process;
          Runtime rt;
          try{
          rt = Runtime.getRuntime();
          process = rt.exec(command);
          InputStreamReader isr = new InputStreamReader(process.getErrorStream());
          BufferedReader bre = new BufferedReader(isr);
          BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream());
          System.out.println(bre.readLine());
System.out.println(br.readLine().split(" ")[7]);
          process.destroy();
          }catch (Exception ex){
               System.out.println("Error :- " + ex.getMessage());
------Output -------------
/usr/bin/stat -Lt "<path>"
/usr/bin/stat: cannot stat `"<path>"': No such file or directory
Error :- null
Can any one help me what is wrong and why i am unable to run the Linux command from Java.

For clarity purpose............i m submitting actual code here
--- Code ---
package test;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.*;
public class GetInode{
* @param args
public static void main(String[] args) {
GetInode test = new GetInode();
test.getInode();
public void getInode(){
String command = "/usr/bin/stat -Lt \"/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt\"";
System.out.println(command);
Process process;
Runtime rt;
try{
rt = Runtime.getRuntime();
process = rt.exec(command);
InputStreamReader isr = new InputStreamReader(process.getErrorStream());
BufferedReader bre = new BufferedReader(isr);
BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));
System.out.println(bre.readLine());
System.out.println(br.readLine().split(" ")[7]);
process.destroy();
}catch (Exception ex){
System.out.println("Error :- " + ex.getMessage());
--- Output ---
[ratz]s0898671: java GetInode
/usr/bin/stat -Lt "/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt"
/usr/bin/stat: cannot stat `"/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt"': No such file or directory
Error :- null
-- Linux Terminal --
If i copy the first line from the output and execute on Linux terminal her is the output that i get
[ratz]s0898671: /usr/bin/stat -Lt "/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt"
/afs/inf.ed.ac.uk/user/s08/s0898671/workspace/CASWESBLIN/TestFS/01_FIL_01.txt.txt 12003 24 81a4 453166 10000 1c 360466554 2 0 1 1246638450 1246638450 1246638450 4096
Can you just assist me where am i really making mistake.......i was wondering if the command that i pass from Java....can be executed on Linux terminal why is it faling to run from java.........and when i print the Error Stream for process output........it show cannot Stat.......

Close a running application from java........

Hi all
I have opened an application say MSWORD from my java class using Runtime.getRuntime(), Now on close button i need to close the application and on the save button of the application i even want to save the application from java command
The question is HOW????
please reply,
Thanx,
Amitt

can I open the konsole from java??Yes.
First you must figure out how to do that from the command line yourself. That has nothing to do with java.
Note that that how you do that MUST account for the fact that the "command line" is actually a shell. Some commands must be run by running the shell as the actual command and then passing the desired command as an option to the shell (the actual command.)
Again you can google for examples.

How to run a remote application (Non Java) from a Java program

Could you please tell me how to run a remote application (Non-Java) from a Java program without using RMI. Please tell me know the procedure and classes to be used.
Cheers
Ram

what do you mean remote application.In the other pc or in your pc just apart from you application?
If the application is in your pc,the method which the upper has mentioned is
a good one!
But if the application you want to run is not in your computer,the method can't do. And you can use socket with which you can build an application listening some port in the pc which contains the application you want to run .When you want to run that application ,send the Start_Command to the listening application.Then listening application will run the application with the help of the method the upper mentioned.

Running a jar file from java code

Hi!
Im trying to run a jar file from my code.
I've tried Classloader, but that doesnt work because it doesnt find the images (also embedded in the 2nd jar file).
WHat I would like to do is actually RUN the 2nd jar file from the first jar file. There must be a way to do this right?
any ideas?

ok, I found some wonderful code (see below) that will try to start the jar. But it doesn't. What it does is produce the following error when my application runs...
So it's not finding the images in the jar file that I am trying to run? Strange. I checked the URL that sending, but it seems ok....
I think I will check the url again to make sure......
any ideas?
Uncaught error fetching image:
java.lang.NullPointerException
     at sun.awt.image.URLImageSource.getConnection(Unknown Source)
     at sun.awt.image.URLImageSource.getDecoder(Unknown Source)
     at sun.awt.image.InputStreamImageSource.doFetch(Unknown Source)
     at sun.awt.image.ImageFetcher.fetchloop(Unknown Source)
     at sun.awt.image.ImageFetcher.run(Unknown Source)
the code....
/* From http://java.sun.com/docs/books/tutorial/index.html */
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.JarURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.jar.Attributes;
* Runs a jar application from any url. Usage is 'java JarRunner url [args..]'
* where url is the url of the jar file and args is optional arguments to be
* passed to the application's main method.
public class JarRunner {
public static void main(String[] args) {
    URL url = null;
    try {
      url = new URL(args[0]);//"VideoTagger.jar");
    } catch (MalformedURLException e) {
      System.out.println("Invalid URL: ");
    // Create the class loader for the application jar file
    JarClassLoader cl = new JarClassLoader(url);
    // Get the application's main class name
    String name = null;
    try {
      name = cl.getMainClassName();
    } catch (IOException e) {
      System.err.println("I/O error while loading JAR file:");
      e.printStackTrace();
      System.exit(1);
    if (name == null) {
      fatal("Specified jar file does not contain a 'Main-Class'"
          + " manifest attribute");
    // Get arguments for the application
    String[] newArgs = new String[args.length - 1];
    System.arraycopy(args, 1, newArgs, 0, newArgs.length);
    // Invoke application's main class
    try {
      cl.invokeClass(name, newArgs);
    } catch (ClassNotFoundException e) {
      fatal("Class not found: " + name);
    } catch (NoSuchMethodException e) {
      fatal("Class does not define a 'main' method: " + name);
    } catch (InvocationTargetException e) {
      e.getTargetException().printStackTrace();
      System.exit(1);
private static void fatal(String s) {
    System.err.println(s);
    System.exit(1);
* A class loader for loading jar files, both local and remote.
class JarClassLoader extends URLClassLoader {
private URL url;
   * Creates a new JarClassLoader for the specified url.
   * @param url
   *            the url of the jar file
public JarClassLoader(URL url) {
    super(new URL[] { url });
    this.url = url;
   * Returns the name of the jar file main class, or null if no "Main-Class"
   * manifest attributes was defined.
public String getMainClassName() throws IOException {
    URL u = new URL("jar", "", url + "!/");
    JarURLConnection uc = (JarURLConnection) u.openConnection();
    Attributes attr = uc.getMainAttributes();
    return attr != null ? attr.getValue(Attributes.Name.MAIN_CLASS) : null;
   * Invokes the application in this jar file given the name of the main class
   * and an array of arguments. The class must define a static method "main"
   * which takes an array of String arguemtns and is of return type "void".
   * @param name
   *            the name of the main class
   * @param args
   *            the arguments for the application
   * @exception ClassNotFoundException
   *                if the specified class could not be found
   * @exception NoSuchMethodException
   *                if the specified class does not contain a "main" method
   * @exception InvocationTargetException
   *                if the application raised an exception
public void invokeClass(String name, String[] args)
      throws ClassNotFoundException, NoSuchMethodException,
      InvocationTargetException {
    Class c = loadClass(name);
    Method m = c.getMethod("main", new Class[] { args.getClass() });
    m.setAccessible(true);
    int mods = m.getModifiers();
    if (m.getReturnType() != void.class || !Modifier.isStatic(mods)
        || !Modifier.isPublic(mods)) {
      throw new NoSuchMethodException("main");
    try {
      m.invoke(null, new Object[] { args });
    } catch (IllegalAccessException e) {
      // This should not happen, as we have disabled access checks
}

How to execute Linux command from Java app.

Hi all,
Could anyone show me how to execute Linux command from Java app. For example, I have the need to execute the "ls" command from my Java app (which is running on the Linux machine), how should I write the codes?
Thanks a lot,

You can use "built-in" shell commands, you just need to invoke the shell and tell it to run the command. See the -c switch in the man page for your shell. But, "ls" isn't built-in anyays.
If you use exec, you will want to set the directory with the dir argument to exec, or add it to the command or cmdarray. See the API for the variants of java.lang.Runtime.exec(). (If you're invoking it repeatedly, you can most likely modify a cmdarray more efficiently than having exec() decompose your command).
You will also definitely want to save the returned Process and read the output from it (possibly stderr too and get an exit status). See API for java.lang.Process. Here's an example
java.io.BufferedReader br =
new java.io.BufferedReader(new java.io.InputStreamReader(
Runtime.getRuntime().exec ("/sbin/ifconfig ppp0").
getInputStream()));
while ((s = br.readLine()) != null) {...

Execute linux command from java

I wanna execute linux command from java, bu the output has error:
Return code = 1
top: failed tty get
The code as:
import java.io.*;
public class Execute {
     public static void main(String[] args) {
          try {
               final Process process = Runtime.getRuntime().exec("top");
               new Thread() {
                    public void run() {
                         try {
                              InputStream is = process.getInputStream();
                              byte[] buffer = new byte[1024];
                              for (int count = 0; (count = is.read(buffer)) >= 0;) {
                                   System.out.write(buffer, 0, count);
                         } catch (Exception e) {
                              e.printStackTrace();
               }.start();
               new Thread() {
                    public void run() {
                         try {
                              InputStream is = process.getErrorStream();
                              byte[] buffer = new byte[1024];
                              for (int count = 0; (count = is.read(buffer)) >= 0;) {
                                   System.err.write(buffer, 0, count);
                         } catch (Exception e) {
                              e.printStackTrace();
               }.start();
               int returnCode = process.waitFor();
               System.out.println("Return code = " + returnCode);
          } catch (Exception e) {
               e.printStackTrace();
}Help please.

Your code is probably good to run a program, that does not use terminal capabilities.
Program "top" is a little bit more complicated - you have to run it with a real terminal.
Try to run "xterm -e top". You can find an example how to run an external program
from java code in cnd/gdb module on http://cnd.netbeans.org
For example, take a look at openExternalProgramIOWindow() method on this page:
http://cnd.netbeans.org/source/browse/cnd/gdb/src/org/netbeans/modules/cnd/debugger/gdb/proxy/Attic/GdbProxyCL.java?rev=1.1.2.6.2.5&only_with_tag=release551_fixes&view=markup
It runs a command with external terminal.
Thanks,
Nik

Run a UNIX Script from java

Hi,
how can i run a unix script from java application. This java application is on windows.
How can i do this.
thanks,

Hi,
how can i run a unix script from java application.
This java application is on windows.
So I think it's safe to assume that the target script is on a remote unix server.
Take a look at http://sourceforge.net/projects/sshtools/

How to call a VB application from Java

Hi,
does anybody know how to call a VB application from java.
Would appreciate if you can provide me with an example.
thanks

try exec()ing the cad program with the name of the file as a command line parameter...
Runtime.getRuntime().exec("CADProg.exe Test.prt");
i have no clue if this will work but it seems like it's worth a try.

Launching applications from java code

I have found a solution to launch applications from java.I thought this will be useful for programmers who want to open a
1. Browser
2. Player
3. Files etc.
There are 2 solutions :
I)To use a known application :
eg: to open windows media player
String[] cmd = new String[3];
cmd[0] = "cmd.exe";
cmd[1] = "/C";
cmd[2] = "START MPLAYER2.exe "+mediaURL+" /PLAY /CLOSE /FULLSCREEN";
//eg: mediaURL = "\"D:/project/songs/track1.mp3\""
// /PLAY /CLOSE /FULLSCREEN this option can be used only for windows media player
// for any other application use cmd[2] as START apl.exe //apl can be any windows application
Process p = Runtime.getRuntime().exec(cmd);
II) To use a default application:
Runtime.getRuntime().exec("rundll32 url.dll,FileProtocolHandler " + url);
// url can be any url
ref: [http://forums.sun.com/thread.jspa?threadID=5203313|http://forums.sun.com/thread.jspa?threadID=5203313]
[http://www.ericphelps.com/batch/rundll/|http://www.ericphelps.com/batch/rundll/]
Edited by: veda_sishta on ? ?????, ???? ??:?? ???????
Edited by: veda_sishta on ? ?????, ???? ??:?? ???????

To post code, use the code tags -- [code]Your Code[/code] will display asYour CodeOr use the code button above the editing area and paste your code between the {code}{code} tags it generates.
And make up your mind what file type you're having a problem with. Maybe .asx doesn't have a file association on your computer.
This works just fine for .m3u:import java.awt.Desktop;
import java.io.File;
import java.io.IOException;
public class Playlist {
   public static void main(String[] args) {
      try {
         Desktop.getDesktop().
               open(new File("E:/Music/Playlists/test.m3u"));
      } catch (IOException ex) {
         ex.printStackTrace();
}db
edit Did you try searching the net for the error you got? ("Invalid menu handle")
Edited by: Darryl.Burke

Running linux applications in Java

I'm doing a project for an application to do wireless mapping, using existing open-source programs (like Kismet and TCPdump).
My problem is that I need to launch linux applications in super user mode from my java program, but I don't know how! I was using Runtime.getRuntime.exec() to launch applications (something like this):
Process prsc;
Runtime rt;
public boolean openApp(String app){ //app is a string with the application to open
try{
rt=Runtime.getRuntime();
prsc=rt.exec(app);
} catch(IOException e){
return false;
return true;
and then using prsc.destroy() to kill the open app.
This was working fine with gedit (used for testing) but now I need to open Kismet wich needs to be open with super user permissions. Anyone know how to do this?
Jo�o Guilherme

Use sudo, e.g. sudo -p passwd kismetYou
need to look up the exact syntax, obviously. Have
your Java program ask the user for the password.You will also need to add the user to the 'sudo'ers list.

How to run Other application from Java

I want to run other applications such as IE.exe, notepad.exe from Java? How can I run?

Dear Friend, the following is the code to open IExplorer from Java Program
class RunTimeTest {
public static void main(String args[]) {
try {
Runtime.getRuntime().exec("C:\\Program Files\\Internet Explorer\\IEXPLORE.exe");
catch(Exception e) {
[\code]
ALL THE BEST
Shiva

Run Oracle Form Application from a JSP File.

I have a complete customized application made on Oracle Forms (10g) and I have .fmb and .fmx files, now problem which I am facing is I have to open the Oracle Form Application from my JSP page (which is used to login the user). My JSP page is just a simple page which I have placed it in path [C:\DevSuiteHome2\forms\j2ee\formsapp\formsweb] and I run it from browser as [http://localhost:port/forms/index.jsp].
How can I start my application from this JSP page? Please your help would be highly appreciated. Thanks.

Inside your JSP page put <OBJECT> tag with all parameters and tags to open Jinitiator or java applet..
my example..

<OBJECT classid="clsid:CAFECAFE-0013-0001-0022-ABCDEFABCDEF"
        codebase="/forms/jinitiator/jinit.exe#Version=1,3,1,22"
        WIDTH="1024"
        HEIGHT="768"
        HSPACE="0"
        VSPACE="0">
<PARAM NAME="TYPE"       VALUE="application/x-jinit-applet;version=1.3.1.22">
<PARAM NAME="CODEBASE"   VALUE="/forms/java">
<PARAM NAME="CODE"       VALUE="oracle.forms.engine.Main" >
<PARAM NAME="ARCHIVE"    VALUE="frmall_jinit.jar,images.jar,in2kartica.jar,paketi.jar,prenospolic.jar,imgbean.jar,moj9999.jar" >
<PARAM NAME="serverURL" VALUE="/forms/lservlet?ifcfs=/forms/frmservlet?form=zav0030f.fmx&acceptLanguage=sl-SI">
<PARAM NAME="networkRetries" VALUE="30">
<PARAM NAME="serverArgs"
       VALUE="escapeParams=true module=zav0030f.fmx userid= sso_userid=%20 sso_formsid=%25OID_FORMSID%25 sso_subDN= sso_usrDN= debug=no host= port= buffer_records=no debug_messages=no array=no obr=no query_only=no quiet=yes render=no record=names tracegroup= log= term=/oracle/forme/qmsrf65w.res" >
<PARAM NAME="separateFrame" VALUE="true">
<PARAM NAME="splashScreen" VALUE="">
<PARAM NAME="background" VALUE="">
<PARAM NAME="lookAndFeel" VALUE="Oracle">
<PARAM NAME="colorScheme" VALUE="teal">
<PARAM NAME="serverApp" VALUE="default">
<PARAM NAME="logo" VALUE="">
<PARAM NAME="imageBase" VALUE="DocumentBase">
<PARAM NAME="formsMessageListener" VALUE="">
<PARAM NAME="recordFileName" VALUE="">
<PARAM NAME="EndUserMonitoringEnabled" VALUE="">
<PARAM NAME="EndUserMonitoringURL" VALUE="">
<PARAM NAME="heartbeat" VALUE="">
<PARAM NAME="clientDPI" VALUE="123">
<COMMENT>
<EMBED SRC="" PLUGINSPAGE="/forms/jinitiator/us/jinit_download.htm"
        TYPE="application/x-jinit-applet;version=1.3.1.22"
        java_codebase="/forms/java"
        java_code="oracle.forms.engine.Main"
      java_archive="frmall_jinit.jar,images.jar,in2kartica.jar,paketi.jar,prenospolic.jar,imgbean.jar,moj9999.jar,Paketi.jar,in2kartica.jarpaketi.jar,moj9999.jarin2kartica.jarpaketi.jar"
        WIDTH="1024"
        HEIGHT="768"
        HSPACE="0"
        VSPACE="0"
     clientDPI="123"
        serverURL="/forms/lservlet?ifcfs=/forms/frmservlet?form=zav0030f.fmx&acceptLanguage=sl-SI"
        networkRetries="30"
        serverArgs="escapeParams=true module=zav0030f.fmx userid= sso_userid=%20 sso_formsid=%25OID_FORMSID%25 sso_subDN= sso_usrDN= debug=no host= port= buffer_records=no debug_messages=no array=no obr=no query_only=no quiet=yes render=no record=names tracegroup= log= term=/oracle/forme/qmsrf65w.res"
        separateFrame="true"
        splashScreen=""
        background=""
        lookAndFeel="Oracle"
        colorScheme="teal"
        serverApp="default"
        logo=""
        imageBase="DocumentBase"
        formsMessageListener=""
        recordFileName=""
        EndUserMonitoringEnabled=""
        EndUserMonitoringURL=""
        heartBeat=""
>
<NOEMBED>
</COMMENT>
</NOEMBED></EMBED>
</OBJECT>

Running a Linux application from Java

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