How to run system commands from JAVA

Hi Friends,
How to run windows system commands from JAVA
Runtime r=Runtime.getRuntime();
r.exec("dir");
Throwing following Exception
CreateProcess :dir error=2
Thanks in advance
Hamsa

Hi ,
in Windows NT this is not possible, you can use the following :
Runtime r=Runtime.getRuntime();
StringBuffer sbuf = new StringBuffer();
String dir = new String();
java.lang.Process proc = r.exec("cmd /c dir");
InputStream is = proc.getInputStream();
int ch ;
while((ch=is.read() ) != -1)
sbuf.append((char)ch);
is.close();
dir = sbuf.toString();
System.out.println(dir );

Similar Messages

  • How to execute system command from java program

    Hi all,
    I want to change directory path and then execute bash and other unix commands from a java program. When I execute them separately, it's working. Even in different try-catch block it's working but when I try to incorporate both of them in same try-catch block, I am not able to execute the commands. The change directory command works but it won't show me the effects of the bash and other commands.
    Suggestions??

    The code I am using is....
    try
    String str="cd D:\\Test";
    Process p=Runtime.getRuntime().exec("cmd /c cd
    "+str);your str string is already having cd in it but again you ar giving cd as part of this command also please check this,i will suggest you to remove cd from str
    Process p1=Runtime.getRuntime().exec("cmd /c mkdir
    "+str+"\\test_folder");you should say mkdir once you change your path,but here you are saying mkdir first and then cd D:\Test(this is because of str)..please check this
    Process p2=Runtime.getRuntime().exec("cmd /c bash");
    Process p3=Runtime.getRuntime().exec("cmd /c echo
    himanshu>name.txt");
    catch(IOException e)
    System.err.println("Error on exec() method");
    e.printStackTrace();
    Message was edited by:
    ragas

  • Running ls command from Java stroed procedure no output

    Hi ,
    I am trying to run ls command from java stored procedure in oracle
    Process p = Runtime.getRuntime().exec("ls");
    BufferedReader stdInput = new BufferedReader(new
    InputStreamReader(p.getInputStream()));
    BufferedReader stdError = new BufferedReader(new
    InputStreamReader(p.getErrorStream()));
    // read the output from the command
    System.out.println("output of the command run:\n");
    while ((s = stdInput.readLine()) != null) {
    System.out.println(s);
    from java stored procedure in oracle.
    i get output of println statments but it does not go into while loop to print from stdInput.
    Result of running Java stored procedure is -
    output of the command run:
    Call completed.
    when i run the program on client side it works fine.
    Has anybody tried this from java stroed procedure.
    Thanks,
    Jag

    Jag,
    Actually, the question of whether it works for me seems to depend on the version of the OS (or Oracle). On RedHat Linux (Oracle 8.1.6) it didn't work at all, but on Solaris (Oracle 9.0.2) it did. Here's the output from that run:
    SQL> /
    output of the command run:
    init.ora
    initDBPart9i.DBPSun01.ora
    initdw.ora
    lkDBPART9I
    orapw
    orapwDBPart9i
    spfileDBPart9i.ora
    Done
    PL/SQL procedure successfully completed.
    But, I did need to change a line of your code to this:
    Process p = Runtime.getRuntime().exec("/usr/bin/ls");
    your original was:
    Process p = Runtime.getRuntime().exec("ls");
    You might consider, if possible, use of some of the Java File classes instead of ls, as this might make things more predictable for you. There were some examples in oramag.com a few months ago, but they were pretty simple (you might not need them).
    Hope this helps,
    -Dan
    http://www.compuware.com/products/devpartner/db/oracle_debug.htm
    Debug PL/SQL and Java in the Oracle Database

  • 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) {...                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

  • How to call gnuplot command from java

    Hi there,
    In our course, we are required to develop an GUI for gnuplot. In case you don't know about gnuplot, it's a plotting program and has lots of command. We want to use java and swing, but now we don't know how to call gnuplot command from java, or how to execute a shell command(script) from java.
    By the way, since we need read in files with several columns of data and allow user to select a column, we want to use JTable. Is that reasonable?
    Thanks a lot for any suggestions!
    Jack

    Hi, there:
    Will using JTable add much overhead? I may have to use several JTables and switch among them. I can add scroll bar to or edit JTables, right?
    BTW, do you have experience about gnuplot? Can I find the command tree of gnuplot somewhere? Or do you know a better place to post question about gnuplot? unix/linux group, maybe.
    Thanks,
    Jack
    P.S. Would you guys answer my question after I use up my duke dollars? :- )

  • Please help how to run System commands and batch files thru java program

    Sir,
    I want execute OS commands like dir,cls..etc and batch files,.exe filesthru java program.
    I have tried it sofar thru Runtime.getRuntime().exec("execute.bat");
    but it is not working.anybody knows about how to run the system commands thru java please give me the code.
    thank you,
    regards,
    j.mouli

    I've seen other posts with this questions, and answers. Unfortunately I didn't pay much attention. But the basic idea is to exec command.com and pass the specifc batch or command as an argument.

  • Running System Commands using Java

    HI,
    I am developing an application using java which requires some system commands to be run.For example i have to write a java function which can program the windows scheduler to run a particular executable at some time & another one to initiate an ftp.I however do not know how to execute the corresponding commands from java.Is there any way or some specific api(similar to the system command in c) that i can use to perform these operations.I am using j2sdk 1.4.0_01 on a win 98 machine to develop the application.

    See [url http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Runtime.html]java.lang.Runtime

  • Running ssh command from java and then answering password prompt

    Hi,
    I have a situation that has not solved yet. I am running ssh command from unix terminal without any problem, and then i enter password.
    For example :
    [oracle@fuata]:/export/home/oracle> ssh -N [email protected] -L 9901:127.0.0.1:9999
    Password:
    It is working. I have question that how can i perform this in java? I am thinking that i can run ssh command by using Runtime Class, it is ok. But how can i answer the password? I am a bit confused. Is there any example looks like this?
    Thanks for responses.

    futi wrote:
    Thanx. Firstly i insisted to do this without jsch but actually this is harder than jsch. I edit some of code pieces PortForwardingL.java and could run it. It works problem-free. Could you say why you "insisted" on this approach. It can't be for speed+ since jsch is very fast. It can't be for portability+ since jsch is portable but the use of Runtime.exec() requires the installation of ssh software. It can't be because of limitations+ since jsch is a fully featured library. It can't be for security+ since jsch is secure. It can't be for ease of use+ since jsch is much easier to use than ssh with Runtime.exec(). Unless it's a licensing issue, it can't be for commercial+ reasons since jsch is free. The only reason I can think of why one would "insisted" on this approach is if it is for some college project.

  • Urgent!! running system command in java

    i am trying to run system command(windows) in java. I am getting
    exception as java.io.IOException: CreateProcess: c:\dir
    Please Help.
    Here is the code
    import java.io.*;
    public class RunCommand {
    public static void main(String[] args) {
    try
    //run dir command
    Process p = Runtime.getRuntime().exec("c:\\dir");
    BufferedReader stdInput=new BufferedReader(new
    InputStreamReader(p.getInputStream()));
    BufferedReader stdError =new BufferedReader(new
    InputStreamReader(p.getErrorStream()));
    //read the output
    System.out.println("here is the output:\n");
    while((s=stdInput.readLine())!=null){
    System.out.println(s);
    System.out.println("here is the error if any");
    while((s=stdError.readLine())!=null){
    System.out.println(s);
    System.exit(0);
    }//end try
    catch (IOException e)
    System.out.println("exception Happened" );
    e.printStackTrace();
    System.exit(-1);

    It works fine if you replaceProcess p = Runtime.getRuntime().exec("c:\\dir");withProcess p = Runtime.getRuntime().exec("cmd /c dir");And don't forget to define your s variable.

  • 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>

  • How to run system command

    Hi
    Is that possible to run system command in indesign javascript?
    Becase i need to run a command in run prompt while script running in .indd file.
    Any idea please let me know

    Hi Maciej,
    For time being i m already using the execute() only for generating pdf from ps.
    In this case i cant able set job option in distiller.
    The problem y i m trying to run system command is i need pass some parameters (ie., job option, mypsFile) through my script.
    Is there any other sollutions?
    Thank and Regards
    Christy

  • How to run OS commands from PL/SQL???

    Hi
    Is there any way to run OS commands(Windows Platform) from within PL/SQL?
    Thanks

    APC,
    I am working on Discoverer, having lots of BAs & Workbooks created & stored in Database. Now if i want to move all the workbooks from one place to another (like from development to test or production) i can use Command line interface of Disco to do this. But i don't see any option there to export all the workbooks, so i thought of writing a pl/sql to get all the workbook names from the EUL then fire export Command for each record(although not a good practice but its a one time work). This is the place where i need to run OS command from within PL/SQL. Although it doesn't seem possible now(as you all said) without external procedure.
    Lastly, you are right that "Oracle make databases not operating systems" but my first impression/comment about oracle is:
    "Oracle is far Bigger, Powerful, Complex, Vast and Interesting System than any other..." so i believe it can do/capable doing anything :-)
    thx Ashutosh,
    Host is definitely an option but i can't run it from pl/sql(that i am looking for)..

  • How to run ODI scenario from java?

    I am new to java, need to do some testing on how to invoke ODI scenarios from java.
    Can somebody drop me some simple code?
    Thanks a lot,
    Lei

    Hi there
    1. Start your agent (double click agent.bat)
    2. generate scenario for ur package(right click ur package , select generate scenario)
    3. Add the odi-sdk-invocation.jar file to your java project
    ODIcmdScenario=new OdiCommandScenario();
    ODIConnection=new OdiRepositoryConnection();
    ODIConnection.setOdiUser("ur-username");
    ODIConnection.setOdiPassword("ur-password");
    ODIConnection.setJdbcDriver("Driverdetail");
    ODIConnection.setJdbcUrl("url-details");
    ODIConnection.setJdbcUser("dbusername");
    ODIConnection.setJdbcPassword("dbpass");
    ODIcmdScenario.setScenName("scenarioname");
    ODIcmdScenario.setScenVersion("scenarioversion");
    ODIcmdScenario.setLogLevel(5);
    ODIcmdScenario.setContext("context");
    ODIConnection.setWorkRepositoryCode("repository");
    ODIInvocation = new OdiInvocation("hostname", 20910); //20910 default port
    OdiInvocationResult result=ODIInvocation.invokeCommand(ODIcmdScenario,ODIConnection);
    Hope this helps!
    Cheers

  • How to run SQL files from Java?

    Hi,
    Can someone point me towards a link on how to run sql files in Java? Thanks.
    P.S...if I've been completely blind please go easy on me!

    Sorry forgot the formating code thingy
    public static boolean executeScript(File script, Connection conn){
        boolean success = true;
        success = script.exists();
        if(success){
          DEBUG.print("ES::READING SCRIPT:" + script.getAbsolutePath());
          StringBuffer buffer = new StringBuffer();
          success=readScript(script,buffer);
          if(success){
            try{
              String creationScript = buffer.toString();
              Statement st = conn.createStatement();
              int start = 0;
              int end = 0;
              while (end != -1 && start < creationScript.length()) {
                end = creationScript.indexOf("GO", start);
                if (end != -1) {
                  DEBUG.print(creationScript.substring(start, end));
                  st.executeUpdate(creationScript.substring(start, end));
                  start = end + 2; //2 is the length of "GO"
              st.close();
            }catch(Exception e){
              success=false;
              DEBUG.printStackTrace(e);
        }else{
          DEBUG.print("ES::SCRIPT FILE DOES NOT EXISTS");
          success=false;
        return success;
      public static boolean readScript(File script, StringBuffer buffer){
        boolean success = true;
        DEBUG.print("RS:: reading file :" + script.getAbsolutePath());
        try{
          InputStreamReader isr = new InputStreamReader(new FileInputStream(script),"UTF16");
          int ch;
          while ( (ch = isr.read()) > -1) {
            buffer.append( (char) ch);
          if (isr != null)
            isr.close();
        }catch(Exception e){
          success=false;
          DEBUG.printStackTrace(e);
        return success;
      }

Maybe you are looking for