[FIXED] How to execute cmd commands via Java

Issue

I am trying to execute command line arguments via Java. For example:

// Execute command
String command = "cmd /c start cmd.exe";
Process child = Runtime.getRuntime().exec(command);

// Get output stream to write from it
OutputStream out = child.getOutputStream();

out.write("cd C:/ /r/n".getBytes());
out.flush();
out.write("dir /r/n".getBytes());
out.close();

The above opens the command line but does not execute cd or dir. Any ideas? I am running Windows XP, JRE6.

(I have revised my question to be more specific. The following answers were helpful but do not answer my question.)

Solution

The code you posted starts three different processes each with it's own command. To open a command prompt and then run a command try the following (never tried it myself):

try {
    // Execute command
    String command = "cmd /c start cmd.exe";
    Process child = Runtime.getRuntime().exec(command);

    // Get output stream to write from it
    OutputStream out = child.getOutputStream();

    out.write("cd C:/ /r/n".getBytes());
    out.flush();
    out.write("dir /r/n".getBytes());
    out.close();
} catch (IOException e) {
}

Answered By - Peter Knego

Answer Checked By - Clifford M. (PHPFixing Volunteer)