Runtime.exec() I need to run a command prompt command from java.

Question

the code i have that doesn't seem to work is:
String driveloc = System.getProperty("user.dir").substring( 0, 1 );
        String path = jTextFieldPath.getText();
        String path2 = jTextFieldPath.getText().substring(0, jTextFieldPath.getText().length()-3) + "lst";
        String[] cmd = { "cmd.exe", "/" + driveloc, "ASMtools\\AS11 " + path + " -L >" + path2};
        txt_mf.append( cmd[3] );
        try {
            Process np = Runtime.getRuntime().exec( cmd );
        catch( java.io.IOException ioe) {
            //error
        }jTextFieldPath.getText() contains the path of the file saved by my program.
the line of code i am trying to run is:
AS11 FILE1 -L FILE2this line compiles the asm file and converts it to a lst creating an s19 file in the process. AS11 is an exe that aids the command prompt much like javac.
If you could help me figure this out it would be great.
Thanks in advance,
-Juke

Answer 1

String driveloc =
System.getProperty("user.dir").substring( 0, 1 );
String[] cmd = { "cmd.exe", "/" + driveloc,
  "ASMtools\\AS11 " + path + " -L >" + path2};Are you sure you want to invoke cmd.exe with the switch /c or /d or whatever depending on System.getProperty("user.dir") ?
Starts a new instance of the Windows 2000 command interpreter
CMD [A | /U] [Q] [D] [E:ON | /E:OFF] [F:ON | /F:OFF] [V:ON | /V:OFF]
    [[S] [C | /K] string]
/C      Carries out the command specified by string and then terminates
/K      Carries out the command specified by string but remains
/S      Modifies the treatment of string after /C or /K (see below)
/Q      Turns echo off
/D      Disable execution of AutoRun commands from registry (see below)
/A      Causes the output of internal commands to a pipe or file to be ANSI
/U      Causes the output of internal commands to a pipe or file to be
        Unicode
/T:fg   Sets the foreground/background colors (see COLOR /? for more info)
/E:ON   Enable command extensions (see below)
/E:OFF  Disable command extensions (see below)
/F:ON   Enable file and directory name completion characters (see below)
/F:OFF  Disable file and directory name completion characters (see below)
/V:ON   Enable delayed environment variable expansion using c as the
        delimiter. For example, /V:ON would allow !var! to expand the
        variable var at execution time.  The var syntax expands variables
        at input time, which is quite a different thing when inside of a FOR
        loop.
/V:OFF  Disable delayed environment expansion.