How to execute DOS command in Java?

I want to execute a dos command in Java,such as execute test.bat command? How to realize it?
Thanks in advance!

http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
I found this article really useful in solving this. Hope it helps.
Cheers,
John

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How to execute dos command in Java program?

In Perl, it has System(command) to call dos command.
Does java have this thing?
or any other way to execute dos command in java program?
Because i must call javacto compile a file when the user inputed a java file name.

Look in the Runtime class, it is implemented using the Singleton design pattern so you have to use the static method getRuntime to get its only instance, on that instance you can invoke methods like
exec(String command) that will execute that command in a dos shell.
Regards,
Gerrit.

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Thanks Buddy!
That was very useful. Even though its a simple
solution, I never thought about that.Bullshit! Reread reply #7 of http://forum.java.sun.com/thread.jspa?threadID=780193

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).
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EXECUTE DOS COMMANDS WITH JAVA

I'm new to java and I want to execute dos commands by java
can someone help me by by anyway?
like tell me the packages or methods I need
or give me links to sites?
thanks

No Arguments:
try {
        // Execute a command without arguments
        String command = "ls";
        Process child = Runtime.getRuntime().exec(command);
        // Execute a command with an argument
        command = "ls /tmp";
        child = Runtime.getRuntime().exec(command);
    } catch (IOException e) {
    }With Arguments:
try {
        // Execute a command with an argument that contains a space
        String[] commands = new String[]{"grep", "hello world", "/tmp/f.txt"};
        commands = new String[]{"grep", "hello world", "c:\\Documents and Settings\\f.txt"};
        Process child = Runtime.getRuntime().exec(commands);
    } catch (IOException e) {
    }

Execute dos commands through java

Hi,
Im trying to execute dos commands through java like
          try {
               java.lang.Runtime.getRuntime().exec("cmd /c cls");
          }catch(IOException e){
               System.out.println(e.getMessage());
          }Not sure if its possible? however
open notepad would work
          try {
               java.lang.Runtime.getRuntime().exec("notepad");
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          }Im trying to execute a cls commands to clear screen but without luck.

The question is, which shell do you want to clear?
I don't really know, but it could be that Runtime.exec executes its command in a new shell window...

How to run DOS command in Java environment?

Can i run DOS command in Java environment?
I did like this:
Runtime r = Runtime.getRuntime();
r.exec("cmd.exe");
r.exec("set classpath=%CLASSPATH%;.\\tmp")
but failed.
However if I run the java command, it runs successfully.
r.exec("javac Test.java");
r.exec("java Test");
how should I do so that i can run the DOS commands metioned above in Java Environment?
thanks a lot.

Have a look at http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
This may help. I wonder if this is ok ?
Runtime r= Runtime.getRuntime();
r.exec("cmd.exe /C set classpath=%CLASSPATH%;.\\tmp\"");

Execute DOS command inside java

I have a java program that reads each new user from an inputfile and writes that same user to an output file. The program works fine and is shown below:
import java.io.*;
public class FileStreamsTest {
public static void main(String[] args) {
try {
File inputFile = new File("newbousrs.txt");
File outputFile = new File("outagain.txt");
FileInputStream fis = new FileInputStream(inputFile);
FileOutputStream fos = new FileOutputStream(outputFile);
int c;
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fis.close();
fos.close();
} catch (FileNotFoundException e) {
System.err.println("FileStreamsTest: " + e);
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System.err.println("FileStreamsTest: " + e);
What I would like to do after each write is to execute a DOS command that looks something like this: supervsr.exe -USER username -PASS password -IMPORTUSERS importfile.txt
The DOS command above will add each user to the system I want to as the loop goes through each user record.
How do I execute the DOS command above inside java?

Tried what but still having a problem...here is my code:
import java.io.*;
public class ReadSource {
public static void main(String[] arguments) {
try {
FileReader file = new FileReader("newbousrs.txt");
                              //FileWriter letters = new FileWriter("outagain.txt");
                              //PrintWriter pw = new PrintWriter(new FileWriter("outagain.txt"));
BufferedReader buff = new BufferedReader(file);
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boolean eof = false;
while (!eof) {
String line = buff.readLine();
if (line == null)
eof = true;
else
System.out.println(line);
                                             Process proc = rt.exec("\\Blowfish\\droot\\Program Files\\Business Objects\\BusinessObjects 5.0\\supervsr.exe -USER xxxxx -PASS yyyy -IMPORTUSERS \\Blowfish\\droot\\accsp\\public\\newusers\\newbousrs.txt");
                                             //System.out.println(line.substring(4, 10));
                                             //System.out.println(line.substring(3,line.indexOf(',',3)));
buff.close();
} catch (IOException e) {
System.out.println("Error -- " + e.toString());
There error I get is this:
C:\jakarta-tomcat-4.0.3\webapps\webdav\WEB-INF\classes\accsp>java ReadSource
NU,Public,Steve Mcnealy,Steve Mcnealy,U,N,N,Y,N,N,PC,F,Y,N,N
Error -- java.io.IOException: CreateProcess: \Blowfish\droot\Program Files\Busin
ess Objects\BusinessObjects 5.0\supervsr.exe -USER accsp -PASS fish -IMPORTUSERS
\Blowfish\droot\accsp\public\newusers\newbousrs.txt error=3

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:
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ex.printStackTrace();
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Crosspost:
http://forum.java.sun.com/thread.jspa?threadID=5185230&messageID=9721722#9721722
http://forum.java.sun.com/thread.jspa?threadID=5185199&messageID=9721587#9721587
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Message was edited by:
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How to run dos command on java

would java run the dos command ?
if yes ~would you mind give me some example~please~

..or just use:
Runtime.getRuntime().exec("cmd /c commandyouwanttouse");
Hope it works!

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();
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               Process process = runtime.exec("calc");
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          } catch (Exception e) {
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          }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

Help with executing windows command in java

hi, i am trying to execute dos command in java. currently i am trying simply to create a folder in the current directory.
here is the code snippet:
try {
Process p = Runtime.getRuntime().exec("md myFolder");
} catch (IOException io) {
io.printStackTrace();
i have also tried using "mkdir" instead of "md". but my code just throws an exception that says:
java.io.IOException: CreateProcess: md myFolder error=2
what have I done wrong? thanks in advance

try {
Process p = Runtime.getRuntime().exec("cmd /c
mkdir myFolder");
catch (IOException io) {
io.printStackTrace();hey! that code worked out perfectly. so "cmd" is needed to run dos commands? i searched through the net, but most of the examples that i were able to find did not include "cmd".
if it wouldn't be too much trouble, what is the option "/c" for?
i would also like to add that "mkdir" also works. The problem was the missing "cmd /c". Thanks guys for your help! I really appreciate it.

How to execute DOS command in Java?

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