Re: using jave to run linux and windows commands

13 Oct 2006 06:32:33 -0700
Pat wrote:

hi all
I would like to write a gui to run windows and linux commands, is this
possable ?

the aim would be to write a GUI that would run on top of the os and for
example, I would like to run dir on a windows box i.e. I would click
dir on the windows box, or else on linux run ls on the Linux box ?

would this be possable and what library's would you use to do this ?

Thanks for you help in advance
Pat Rice

Its a bit cumbersome. The dir command is not a "dir.exe" program but
instead a buildin command of the command prompt. Therefore you have to
some extra tricks to get it working. Here is a complete example that
works and can be used for running any type of commands. On unix you
don't need the temp file ie:

String[] params = {"df", "-k", "/" + path};
Process p = Runtime.getRuntime().exec(params);

will do the trick.


public class Test {

    public static void main(String[] args) {
        File script = new File(System.getProperty(""),

        PrintWriter writer = null;
        InputStream reader = null;
        try {
            writer = new PrintWriter(new FileWriter(script, false));
            // get the output from running the .bat file
            Process p =
            reader = new BufferedInputStream(p.getInputStream());
            StringBuffer buffer = new StringBuffer();
            while (true) {
                int c =;
                if (c == -1) {
                buffer.append((char) c);
            String outputText = buffer.toString();

            System.out.println("outputText = " + outputText);

        } catch (IOException e) {
        } finally {
            if (writer != null) {
            if (reader != null) {
                try {
                } catch (IOException e) {
                    // do nothing


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