Can we execute DOS Commands from a Java Application

I just want to know whether we can execute DOS Commands from a Java Application.
Thanks.

hi,
try this:
Runtime.getRuntime().exec("cmd /c start abc.bat");
andi

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Running a dos command from a java application

hello,
I'm trying to execute a batch file from a java application. I tried with:
try
Process proc=Runtime.getRuntime().exec("fop -fo "+iXmlFoFile+" -
svg "+SvgFileName);
}catch (IOException e){System.err.println("Error in conversion of
the Xml FO file into Svg file: "+e);}
and with:
try
Process proc=Runtime.getRuntime().exec("cmd ./c fop
-fo "+iXmlFoFile+" -svg "+SvgFileName);
}catch (IOException e){System.err.println("Error in conversion of
the Xml FO file into Svg file: "+e);}
but i have a IOException: CreateProcess: .... error=2
When I try these line to launch a .exe file it works but not with a .bat file.
I also tried:
String execstr = "fop -fo "+iXmlFoFile+" -svg "+SvgFileName;
String [] commandArray = { execstr };
try {
Runtime.getRuntime().exec(commandArray);
} // end try
catch ( Exception e ) {
System.out.println( e.getMessage() );
e.printStackTrace();
}// end catch
but i got the same exception in java.lang.Win32Process.create
What did i do wrong?

Your execution string is a bit more that I want to figure out, but here are a couple ideas:
Is the working directory of any importance? If so you'll need to set that when you do your exec()
I think I remember reading something about batch files that couldn't be kicked off via this method. Perhaps you need to execute the string "start mybatchfile.bat". Seems like you need to do something like that to get a command interpreter to run your batch file.

Executing DOS command from within java.

I have an XML file and an XSLT stylesheet.
I want to process this XML file using XSLT stylesheet from java. Using saxon.
Here is the java class I wrote --
class DOSCommand {
public void exec_command(String[] cmd) {
try {
Process child = Runtime.getRuntime().exec(cmd);
} catch (IOException e){
System.out.println("Error");
System.out.println(e.getMessage());
finally{
System.out.println("Finally");
In my servlet class I am instantiating the DOSCommand object and calling the method
DOSCommand d = new DOSCommand();
String[] c = { "c:\\Program Files\\saxon\\saxon.exe", "-o",
"PO.html", "ePO.xml", "POE.xsl"
d.exec_command(c);
But I am not getting results. It does not give any error. But does not process the XML file and the Date/timestamp of PO.html does not change.
I know that Definition/Creation of DOSCommand object is not necesssary here. But we can disregard it.
Please let me know where I am going wrong !
Avinash.

Probably where you are going wrong is in failing to specify your working directory, so your command can't find "PO.html" and so on in the default working directory for that command. But that's not really the answer. The answer is not to do it in that way in the first place. Saxon has a Java API and its documentation has a section entitled "Embedding Saxon in an application".

Executing jar command from the java application

Hi All,
In my application i want to create a jar file with the existing class @ Runtime and want to download . But i tried to execute the jar command via Process.getRuntime, it throws IOException. Please guide me or give the solution

PavithraKarthikeyan wrote:
Please guide me or give the solutionQuestion your need for this. Why do you think you need to create the jar file.
P.S. The jar command is only available if the user has the JDK installed so if he has only the JRE installed then you have a problem using Runtime.exec(). There are classes (java.util.jar.JarFile et al) that will allow you to jar files using Java code.

Runnig DOS commands from the java code?

Hi reader,
how can I execute DOS commands (I am on an Windows XP Machine) from my java code and also capture the output?
I think the
runtime.exec(command)
only executes win32 processes.
Please suggest
TIA
Ayusman

Again, this link should tell you most of what you need to know:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
You're not limited to the Win32 platform unless you're using specific DOS commands. Perhaps if you're just after file system information then some of the classes in the java.io package can help.
If it's not enough, perhaps a resource bundle or something similar can provide you with the names of the external programs you need to run, i.e. "dir" for win and "ls" for *nix.

Execute DOS command from SAP

hi experts ,
i need to execute DOS command from SAP .
earlier we have 'GUI_EXEC' WS_EXECUTE , 'WS_DOWNLOAD' etc which are Obsolete now.
as we are using ECC6.0. kindly guide how to do this.
best regards,
Rahul

Try out...
DSVAS_DOC_WS_EXECUTE_50
or
CL_GUI_FRONTEND_SERVICES=>EXECUTE
<b><REMOVED BY MODERATOR></b>
Thanks & Regards
ilesh 24x7
Message was edited by:
Alvaro Tejada Galindo

How can I execute a query from a BSP application?

How can I execute a query from a BSP application?
I´m trying to execute a Query from intranet. I´ve been looking for examples, but the templates I´ve found doesn´t help me.
does anybody has an example?
Thanks.

Hi
Have you designed the BSP application ?
design it first with one page
page will have layout and Event handlers
Design the layout with the fields
in the event handler there are events
in the event On Initiailization or ON inputprocessing write the select query similar to what we write in routine ABAp and fetch the data into ITAB and that has to be passed to the Layout
see the doc
BSP
To learn how to create Web applications with Business Server Pages, you can work through the simple tutorials that build on each other. You should be able to run through all of the steps described here in your own system.
If you want to develop Web applications with BSPs, your system must meet the following requirements: Prerequisites for Creating Web Applications.
The following tutorials are available:
· First Tutorial: First Steps with Business Server Pages
· Second tutorial: A Small BSP Application and A Small BSP Application with HTMLB
· Third tutorial: Our First Online Bookshop
· Fourth tutorial: Further Developing the Bookshop
· A small Tutorial is also available for your first steps with the Model View Controller design pattern.
· For a more complex MVC tutorial based on the third tutorial, see: Our Little Online Bookshop Using MVC and HTMLB
When creating BSP applications, note the browser dependencies described in Note 598860.
steps:
1) start the transaction RZ10.
2) now u u have to select Profile name, so select the INSTANCE Profile from the list of options given with the Profile parameter list.U may find multiple instance profile in the list, so select the profile in which ur server name is given.
3) u will also find three options in the same window.
Administrator data, Basic Maintenance, and Extended Maintenance. So select the last one from that.
4) Now click on change button.
5) here u will find parameter icm/host_name_full, so now set it as FQDN.
6) Now copy ur settings with new version number.
7) Activate that version.
8) And now please restart ur WAS.
So this will set ur FQDN, and also don't forget to login using Admin User.
Now u also check for following service are active in your ICF setting or not,( just start transaction code SICF)
/default_host/sap/bc/bsp/sap
/default_host/sap/bc/bsp/sap/system
/default_host/sap/bc/bsp/sap/public/bc
/def ault_host/sap/public/bc
/default_host/sap/public/bc/ur
/default_host/sap/public/bsp/sap/public
/default_host/sap/public/bsp/sap/public/bc
/defaul t_host/sap/public/bsp/sap/system
/default_host/sap/public/bsp/sap/htmlb
if not then activate all.
check this link
Read this weblog...
/people/brian.mckellar/blog/2003/09/25/bsp-in-depth-fully-qualified-domain-names
http://www.thespot4sap.com/articles/SAP_WAS_Creating_BSP_Apps.asp
it consists of screen shots also
Check it.
http://help.sap.com/saphelp_nw04/helpdata/en/c8/101c3a1cf1c54be10000000a114084/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/e9/bb153aab4a0c0ee10000000a114084/frameset.htm
Regards
Anji

Execute DOS command from java application

Hello,
I want to execute a DOS command (MOVE, in order to move an image from a folder to an other) from a java application. How can I do this?
Francesco

Yes I have tested it and it is working but only when executing a bacth file. For instance:
Runtime rt = Runtime.getRuntime();
try{
Process proc = rt.exec("move.bat");
}catch(Exception ex){
ex.printStackTrace();
}and the command in move.bat is:
move c:\\temp\\*.gif C:\\temp2
You don't have to use double slashes in batch files, only in Java. But anyway it is working both ways.
It is not working when you try to execute the command without the batch file:
Process proc = rt.exec("move c:\\temp\\*.gif C:\\temp2"); -> this will not work.
It should work. Try to execute another command to see what happens.

How:Execute OS commands from a Java program

hi,
is it possible to execute an OS command from a java program, as in C/C++? if yes, plz give the details.
thanx

In the future try searching the forum before posting. Using keywords like "execute os commands" would lead you to several postings on this topic.
Note the keywords where taken directly from you subject line. With practice you learn which keywords to use to yield the best search results.

Execute DOS command from Java Code

Hi All
I am developing a Java application where I am launching some external Windows application on click event of a button.
I am able to launch that application, but now I have to keep a check that if once that application is launched on clicking the button, then next time it should not launch. But if user exits that external application, then on clicking the button that application should be launched. I tried several ways but i am not able to keep track of that process which makes that application run. The major problem is that when that application is being launched and running, i don't have anything to read or write to that process's Input Stream or Output Stream. Can any one help me out in this????

ApratimSharma wrote:
You Might not get anything in the inputstream.read but when the external application will exit you will definitely get EOF (int -1). However Important thing here is that inputstream.read is a blocking call so better do it in a separate thread.
          Runtime runtime = Runtime.getRuntime();
          try {
               Process process = runtime.exec("calc");
               InputStream inputStream = process.getInputStream();
               if (inputStream != null) {
                    System.out.println("Running");
               while (inputStream.read() != -1);
               System.out.println("Exited");
          } catch (Exception e) {
               e.printStackTrace();
          }Now that is what I call 'stating the obvious' !
You need to read the 4 sections of [http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html|http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html] and implement ALL the recommendations.
Edited by: sabre150 on Oct 8, 2009 10:00 AM

How to execute unix command from the Java program running on Windows

Hello,
I need to
1. Execute a unix shell script from a Java program running on the Windows.
2. I also need to capture the output of this shell script in my program.
Please suggest me how to achieve this.
Thanks in Advance.

Hi...
Something is missing here
If you want to execute a shell script in windows that not posible unless you find or develop a unix shell script parser for windows.
But if you are trying the execute a unix shell script on a remote unix computer from your java program running on a windows platform you can do that by logging on to the UNIX terminal which is running on port 23 I think.
You can test this using telnet tool on windows
just type on command prompt
telnet <ip of the unix pc> <port number this case 23>
you should get the unix terminal. If that works you can do the same through java or you can directly conect to port 23 of that pc using sockets that way your program will be platform independant

How can I pass system commands from a java program? Urgent!

hi,
I have been trying this out since a long time. How do I send system commands to command.com or cmd.exe from a java program and an output of the executed command back to the java application.
If u have any idea, or have any information about the kind os application reply back.
Thanks
Deepa Datar

This is the code which I tried, but it displays only the title of MS-DOS, something like " Microsoft Corp...etc ". But doesn't take any input, and the subprocess(cmd.exe) hangs.
import java.io.*;
public class cmddemo2
public static void main(String arg[])
try
System.out.println("cmd");
Process p=Runtime.getRuntime().exec("cmd.exe");
DataInputStream din=new DataInputStream(p.getInputStream());
DataOutputStream dout=new DataOutputStream(p.getOutputStream());
System.out.println("after streams");
String s;
dout.writeChars("type cmddemo2.java");
while((s=din.readLine())!="\n")
System.out.println(s);
dout.writeChars("dir");
String s1;
while((s1=din.readLine())!="\n")
System.out.println(s1);
System.out.println("over");
catch(Exception e)
{ System.out.println("Exception : "+e);

How to execute *.BAT file from the Java Application

Hello to all.
I wants to run *.BAT file form my applicaion.
Can u give the code of that two-four line,please
Wating four your replay.
Yours Friend
Bhavin Shah.....

pr = rt.exec("cmd.exe /c start " + yourProgramName)The exec() method executes the command you specify in the argument and returns a process. In this example, it's telling Windows to run "yourProgramName".
HTH

Problem in executing dos command from runtime.exec(String command);

Hi
i have wriiten a code for running command of DOS-Promt
try
     rnt1 = Runtime.getRuntime();
                              proc1= rnt1.exec("myb");//myb is a batch file      and proc1 is process class instance
                                                            try
                              proc1.waitFor();
                              catch (InterruptedException e)
                         System.out.println("InterruptedException raised: "+e.getMessage());
               catch (IOException ioe)
          System.out.println("IOException raised: "+ioe.getMessage());
But it is giving error while running:
this is showing as an IO exception
CreateProcess: myb error=0
Please help me how to proceed
Thanks

There are 2 possible reasons (perhaps concurrent):
1. The file to be executed is not in the same path of your application, and you MUST specify its whole absolute path as exec() argument;
2. The file to be execute is really (as you call it) a DOS batch file, and then it HAS TO BE NAMED (and called) myb.BAT or (under NT/2000) myb.CMD; WinDOS is Not Unix (WNU): extensions rule!!!

Execute operatingsystem commands from java classes?

How can I execute operatingsystem commands from my java classes?
So that I on a Linux box could i.e. execute "ls -l" etc.

Also read this:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

Can we execute DOS Commands from a Java Application

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