Interacting with cmd.exe

Question

Hi all,
i dunno if this has been asked before, but my problem is to let the user interact with an executable ran via "cmd.exe /c executable".
i have an executable program that awaits a response from the user, but when i used the Streams provided by java.lang.Process after many scenarios i noticed that the process inputStream provides me with the output only when the program is finished, while it returns no text while the program is waiting for response
as an example, my problem looks like :
try {
            Process p = Runtime.getRuntime().exec("cmd.exe /c mysql -u toto");
            BufferedReader reader = new BufferedReader(
                    new InputStreamReader(p.getInputStream()));
              String s = null;
            while ((s = reader.readLine()) != null) {
                    System.out.println(s);
} catch (IOException ex) {
            ex.printStackTrace();
}the mysql command would show "enter password : " or something like that, but this program will not show it...unless the mysql is finished
any ideas? thanks :)

Answer 1

that's right, i tried to look for classes that provide "live streams" in java.io ... i thought the PipedReader and PipedWriter could do it, but i need to get the program's reader and writer for this (and i don't know how to do that...) or maybe those classes are unnecessary and there is another way to do it?