Dos command in java

Hi
I have used google to get an answer for this.
This is the command i have used to run some dos commands in java
Unfortunately it doesn't throws any exceptions but still the directory and the file news.txt is not created.
Process t=objrun.exec("command.com /c dir > c:/news.txt");
Process p=objrun.exec("command.com /c mkdir c:/Prabhath");
Please help me....am using windows xp OS.

Note that the java.util.File has the following methods that might do the job :public File[] listFiles()
public boolean mkdirs()
public boolean createNewFile()

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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.

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.
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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();
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Run dos command from java

May I ask how I should write if I want to execute a dos command in java? The command is :
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why an array ?
String command = "C:\\Program Files\\Real\\realproducer\\rmeditor -i abc.rm -d abc.txt";
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tobias

Dos command from java

hi all
how do i run dos commands from java??????????

Using Runtime#exec().
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OH OH OH WAIT! It is an Applet! i think there will be some security issues here! Sure enough you can't execute commands on the system from an applet unless you make some changes on the java.policy files on the client machine (that means, if your applet is in a web page, every machine which view your page).

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Hi all,
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First, define 'command'.
You can run external programs with Runtime.exec (eg. Runtime.getRuntime().exec("notepad");) but there are a few drawbacks regarding that method.
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

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I'm new to java and I want to execute dos commands by java
can someone help me by by anyway?
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No Arguments:
try {
        // Execute a command without arguments
        String command = "ls";
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        child = Runtime.getRuntime().exec(command);
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try {
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Execute dos commands through java

Hi,
Im trying to execute dos commands through java like
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open notepad would work
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The question is, which shell do you want to clear?
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Error while running DOS command in Java

Hi all,
I use "runtime" class to execute a DOS command "copy C:\\pathname\\*.* C:\\backupPathname\\". But I saw an error msg "CreateProcess: copy C:\pathname\*.* C:\backupPathname\ error=2".
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Running Dos command in Java

hey, Just wondering can anyone help me get started, i pretty new to java and wanted to run the date command in Dos from a java application. If i could just know where to begin or even if this is possible, it would be much appreciated!!

If you're using Runtime.exec() you need to read this:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
If you're new to java it might be a bit heavy, but definitely add it to your "Favourites" for later!

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i need to execute the
" net send"
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thanks a bunch guys!!!
Thanks a bunch guys!!!!

you can do that with exec() in Runtime.
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(command here);but before you do that you need to read this:
http://www.javaworld.com/jw-12-2000/jw-1229-traps.html
hth
partha

Running DOS command from JAVA

Hi ,
I would appreciate if anyone could tell me how to run DOS command such as "del" using JAVA language .Thank you.

<steps onto soapbox>
Surely for something like 'del' we should be advocating a non-OS specific method so we don't lose sight of Java's cross platform abilities.
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<steps off soapbox>

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;
while ((c = fis.read()) != -1) {
fos.write(c);
fis.close();
fos.close();
} catch (FileNotFoundException e) {
System.err.println("FileStreamsTest: " + e);
} catch (IOException e) {
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);
                              Runtime rt = Runtime.getRuntime();
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

Dos command in java

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