HOW DO I RUN DOS COMMANDS ON JAVA

I SWEAR, I'LL PAY YA IF YOU HELP ME!!!
Hi, this is the thing:
have you ever run the "time" command on a DOS console?? if you have, you know that it shows the current time, and lets you set a new time.
well, i need to make a java program to open a DOS console and execute the command, and making it able to write in information on the console so it sets a new time.
MY PURPOSE IS NOT JUST WATCHING THE CURRENT TIME!! so please don't tell me to use System.getCurrentTimeMillis() or something like that; i explicitly need to run that DOS command. what's the Java code to do it??
thank you!! and please attach your account # so you get a $50 deposit by the end of the week
thank you!!

Thanks a lot, you all guys, but i don't know what's with this thing.... it always throws an IOException, with the following exception stack trace:
java.io.IOException: CreateProcess: temp.bat error=0
        at java.lang.Win32Process.create(Native Method)
        at java.lang.Win32Process.<init>(Win32Process.java:63)
        at java.lang.Runtime.execInternal(Native Method)
        at java.lang.Runtime.exec(Runtime.java:550)
        at java.lang.Runtime.exec(Runtime.java:416)
        at java.lang.Runtime.exec(Runtime.java:358)
        at java.lang.Runtime.exec(Runtime.java:322)
        at Tarea.main(Tarea.java:15)and it will come out the same shit over and over. The above case was thrown by the line Runtime.getRuntime().exec("temp.bat") where temp.bat is a file where the only thing written in it is the word "time". and you can change the string parameter of the method exec, and thats what will change in the stack trace above.
I also tried "cmd", "command", and "command.com". With the last one, it opens the command.com application but it freezes and does nothing. With the other two, appears the same old shit from above.
Please help me!!
Thank you...

Similar Messages

  • 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\"");

  • 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.
    If it has to run an OS specific thing fine, but please look for a non OS specific solution first.
    <steps off soapbox>

  • 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 :
    "C:\Program Files\Real\realproducer\rmeditor -i abc.rm -d abc.txt". Should I use array?
    Thanks!

    why an array ?
    String command = "C:\\Program Files\\Real\\realproducer\\rmeditor -i abc.rm -d abc.txt";
    Process p = Runtime.getRuntime().exec( command );what about the seach function on the left side ? ;-)
    tobias

  • 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!                                                                                                                                                                                               

  • Problem while running dos command from java program

    Dear friends,
    I need to terminate a running jar file from my java program which is running in the windows os.
    For that i have an dos command to find process id of java program and kill by using tskill command.
    Command to find process id is,
    wmic /output:ProcessList.txt process where "name='java.exe'" get commandline,processid
    This command gives the ProcessList.txt file and it contains the processid. I have to read this file to find the processid.
    when i execute this command in dos prompt, it gives the processid in the ProcessList.txt file. But when i execute the same command in java program it keeps running mode only.
    Code to run this command is,
    public class KillProcess {
         public static void main(String args[]) {
              KillProcess kProcess = new KillProcess();
              kProcess.getRunningProcess();
              kProcess = new KillProcess();
              kProcess.readProcessFile();
         public void getRunningProcess() {
              String cmd = "wmic /output:ProcessList.txt process where \"name='java.exe'\" get commandline,processid";
              try {
                   Runtime run = Runtime.getRuntime();
                   Process process = run.exec(cmd);
                   int i = process.waitFor();
                   String s = null;
                   if(i==0) {
                        BufferedReader stdInput = new BufferedReader(new
                               InputStreamReader(process.getInputStream()));
                        while ((s = stdInput.readLine()) != null) {
                         System.out.println("--> "+s);
                   } else {
                        BufferedReader stdError = new BufferedReader(new
                               InputStreamReader(process.getErrorStream()));
                        while ((s = stdError.readLine()) != null) {
                         System.out.println("====> "+ s);
                   System.out.println("Running process End....");
              } catch(Exception e) {
                   e.printStackTrace();
         public String readProcessFile() {
              System.out.println("Read Process File...");
              File file = null;
              FileInputStream fis = null;
              BufferedReader br = null;
              String pixieLoc = "";
              try {
                   file = new File("ProcessList.txt");
                   if (file.exists() && file.length() > 0) {
                        fis = new FileInputStream(file);
                        br = new BufferedReader(new InputStreamReader(fis, "UTF-16"));
                        String line;
                        while((line = br.readLine()) != null)  {
                             System.out.println(line);
                   } else {
                        System.out.println("No such file");
              } catch (Exception e) {
                   e.printStackTrace();
              return pixieLoc;
    }     when i remove the process.waitFor(), then while reading the ProcessList.txt file, it says "No such file".
    if i give process.waitFor(), then it's in running mode and program is not completed.
    Colud anyone please tell me how to handle this situation?
    or Is there anyother way to kill the one running process in windows from java program?
    Thanks in advance,
    Sathish

    Hi masijade,
    The modified code is,
    class StreamGobbler extends Thread
        InputStream is;
        String type;
        StreamGobbler(InputStream is, String type)
            this.is = is;
            this.type = type;
        public void run()
            try
                InputStreamReader isr = new InputStreamReader(is, "UTF-16");
                BufferedReader br = new BufferedReader(isr);
                String line=null;
                while ( (line = br.readLine()) != null)
                    System.out.println(type + ">" + line);
                } catch (IOException ioe)
                    ioe.printStackTrace(); 
    public class GoodWindowsExec
        public static void main(String args[])
            try
                String osName = System.getProperty("os.name" );
                String[] cmd = new String[3];
                 if( osName.equals( "Windows 95" ) )
                    cmd[0] = "command.com" ;
                    cmd[1] = "/C" ;
                    cmd[2] = "wmic process where \"name='java.exe'\" get commandline,processid";
                } else {
                    cmd[0] = "cmd.exe" ;
                    cmd[1] = "/C" ;
                    cmd[2] = "wmic process where \"name='java.exe'\" get commandline,processid";
                Runtime rt = Runtime.getRuntime();
                System.out.println("Execing " + cmd[0] + " " + cmd[1]
                                   + " " + cmd[2]);
                Process proc = rt.exec(cmd);
                System.out.println("Executing.......");
                // any error message?
                StreamGobbler errorGobbler = new
                    StreamGobbler(proc.getErrorStream(), "ERROR");           
                          // any output?
              StreamGobbler outputGobbler = new
                    StreamGobbler(proc.getInputStream(), "OUTPUT");
                          // kick them off
                errorGobbler.start();
                outputGobbler.start();
                // any error???
                int exitVal = proc.waitFor();
                System.out.println("ExitValue: " + exitVal);       
            } catch (Throwable t)
                t.printStackTrace();
    }when i execute the above code, i got output as,
    Execing cmd.exe /C wmic process where "name='java.exe'" get commandline,processid
    and keeps in running mode only.
    If i execute the same command in dos prompt,
    CommandLine
    ProcessId
    java -classpath ./../lib/StartApp.jar;./../lib; com.abc.middle.startapp.StartAPP  2468
    If i modify the command as,
    cmd.exe /C wmic process where "name='java.exe'" get commandline,processid  > 123.txt
    and keeps in running mode only.
    If i open the file when program in running mode, no contents in that file.
    If i terminte the program and if i open the file, then i find the processid in that file.
    Can you help me to solve this issue?

  • How to execute MS DOS command through Java program???

    Dear Sir,
    I want to run a MS-DOS command through my Java program. I have tried "Dir" command but no other command which takes command line args doesn't work at all. Please help.
    import java.io.*;
    class CommandPrompt
         public static void main(String[] args)
              try
                   File file = new File("C:/Temp/Java");
                   String[] cmd = {"command.com","/c","md folder"};
                   String[] envp = {""};
                   Process m;
                   String s = "";
                   m = Runtime.getRuntime().exec(cmd,null,file);
                   BufferedReader buf = new BufferedReader(new InputStreamReader(m.getInputStream()));
                   while ((s = buf.readLine())!=null)
                        System.out.println(s);
              catch (Exception ex)
                   System.out.println("Exception is "+ex);
                   ex.printStackTrace();

    1. This forum is for Swing-related issues only. This question should be posted to the "Java Programming" forum.
    2. Please enclose your sample code in code blocks; it's much easier to read that way. See here for how it's done: http://forum.java.sun.com/faq.jsp#messageformat
    3. Please provide more information, like what error messages you got and what OS you're running. For instance, if you're running WinXP, Win2k or NT4, your command processor should be "cmd.exe", not "command.com". When I made that change, your program worked for me.

  • Running Dos Command using Java

    How do i run a particular Dos command using a simple java class?

    Process process = Runtime.getRuntime().exec( ... );
    Search the forum. There are plenty of examples.

  • 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".
    I did create a folder C:\backupPathname\ before running the DOS command.
    Pls help me all Java genius.

    I ended up writing a small 'c' program and pasing the command in to it from java. The problem seems to be that in dos, unlike unix, the copy command is not a program, rather the command is interpreted by the command.com program.

  • 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!

  • Please help How can i run Os commands thru Java programs

    Hey,
    I want to stop and restart the linux server thru java program.Is it possible to run the os commands thru java program.
    I had it thru Runtime.getRuntime().exec("*.exe");
    it only runs the exe files.How can run files other than exe files like .bat,com ans shell commands..Any body knows please help with the code..or mail to this address
    [email protected]
    thankyou,
    regards,
    j.mouli

    What about "start command.com /C execute.bat", or using the overload that takes a String[] as argument?
    What if you use the the full path of execute.bat?
    What error code do you get?
    And what comes th linux, I'm not sure... you'll need a shell interpreter there too, me thinks. (never had to run anything with runtime.exec on linux). Check the man pages if csh, bash, ksh, or what ever shell you like.

  • Dos command from java

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

    Using Runtime#exec().
    Also see http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Runtime.html

  • 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

  • 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.

  • Execute a DOS command in java

    Hi all,
    Is it possible to execute a DOS command in java? If so, how do I do that?
    Also, if it is a Linux machine, may I execute a Linux command in java?
    Thanks for your help.
    Regards,
    Bernard

    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

Maybe you are looking for