Send password to process

Question

Hi,
There is application called blabla.exe. If I type blabla.exe in command prompt, it will asked password.
C:\>blabla.exe
Password:
In java, I create blabla.exe process by this code:
Process p = Runtime.getRuntime().exec("blabla.exe");The question is how do I send "password" programmatically to "blabla.exe" process that created by my java class???

Answer 1

how do i do that??? I try this code:
Process p = Runtime.getRuntime().exec("blabla.exe");
String password = "superman";
OutputStream outputStream = p.getOutputStream();
outputStream.write( password.getBytes() );
outputStream.close();Is it true???? It fail anyway.....
anyway.... I try the code from http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html....
import java.util.*;
import java.io.*;
public class MediocreExecJavac
    public static void main(String args[])
        try
            Runtime rt = Runtime.getRuntime();
            Process proc = rt.exec("javac");
            InputStream stderr = proc.getErrorStream();
            InputStreamReader isr = new InputStreamReader(stderr);
            BufferedReader br = new BufferedReader(isr);
            String line = null;
            System.out.println("<ERROR>");
            while ( (line = br.readLine()) != null)
                System.out.println(line);
            System.out.println("</ERROR>");
            int exitVal = proc.waitFor();
            System.out.println("Process exitValue: " + exitVal);
        } catch (Throwable t)
            t.printStackTrace();
}I change javac to java.... But it hangs after this line:
System.out.println("<ERROR>");
In br.readLine(), I think....
What is the problem??? java 1.5.0 in windows xp.