Re: using jave to run linux and windows commands

Pat wrote:


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.

import java.io.*;

public class Test {

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

        PrintWriter writer = null;
        InputStream reader = null;
        try {
            writer = new PrintWriter(new FileWriter(script, false));
            writer.println("dir");
            writer.close();
            // get the output from running the .bat file
            Process p =
Runtime.getRuntime().exec(script.getAbsolutePath());
            reader = new BufferedInputStream(p.getInputStream());
            StringBuffer buffer = new StringBuffer();
            while (true) {
                int c = reader.read();
                if (c == -1) {
                    break;
                }
                buffer.append((char) c);
            }
            String outputText = buffer.toString();
            reader.close();

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

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

regards

Anders Holmbech Brandt