An attachment to a C ++ console application created in a Java application on Windows

How can I send string data from Java to a C ++ console application on Windows? I am trying to do this:

BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(proc.getOutputStream()));
String o = ...;
proc.getOutputStream().write(o.getBytes());

But I never see it on the C ++ side when I do this:

ReadFile(stdin_h,buf, sizeof(buf), &bytes, 0)

ReadFile never comes back.

The following is further development and sample code.

I wrote a simple C ++ console console (Win32) that reads from STDIN and performs input-based actions.

Now I want to write a Java application to "run" an application in C ++. A Java application should:

• Launch a C ++ application with Runtime.exec()
• Writing String Data to a C ++ STDIN Application
• Repeat until you die.

I am using a Java application, but a C ++ application never gets any data about STDIN.

Here is a C ++ application:

int main()
{
    ofstream f("c:\\temp\\hacks.txt");

    HANDLE stdin_h = GetStdHandle(STD_INPUT_HANDLE);
    DWORD file_type = GetFileType(stdin_h);
    if( file_type != FILE_TYPE_CHAR )   
        return 42;

    f << "Pipe" << endl;
    for( bool cont = true; cont; )
    {
        char buf[64*1024] = {};
        DWORD bytes = 0;
        if( ReadFile(stdin_h,buf, sizeof(buf), &bytes, 0) )
        {
            string in(buf,bytes);
            cout << "Got " << in.length() << " bytes: '" << in << "'" << endl;
            f << "Got " << in.length() << " bytes: '" << in << "'" << endl;
            if( in.find('Q') )
                cont = false;
        }
        else
        {
            cout << "Err " << GetLastError() << " while reading file" << endl;
            f << "Err " << GetLastError() << " while reading file" << endl;
        }
    }
}

And here is the Java side:

public static void main(String[] args) {
    Runtime rt =Runtime.getRuntime();
    try {
        Process proc = rt.exec("c:\\dev\\hacks\\x64\\debug\\hacks.exe");

        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(proc.getOutputStream()));

        int a = 0;
        while(a < 5)
        {
            String o = (a == 4 ? "Q\n" : "A\n");
            proc.getOutputStream().write(o.getBytes());
            System.out.println("Wrote '" + o + "'");
            ++a;
        }
        try {
            proc.waitFor();

            // TODO code application logic here
        } catch (InterruptedException ex) {
            Logger.getLogger(Java_hacks.class.getName()).log(Level.SEVERE, null, ex);
        }
    } catch (IOException ex) {
        Logger.getLogger(Java_hacks.class.getName()).log(Level.SEVERE, null, ex);
    }
}

, , , ++.

- ? Java ++ Windows?