How to send non-command data to the terminal from a JAVA program?

[mtrompe]

Here is my new code:

final Process p = Runtime.getRuntime().exec("p4 login");   
        final BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));   
        final char[] buf = new char[20];   
        System.out.println(new String(buf, 0, in.read(buf)));   
        System.out.println("Sending password");   
        new PrintWriter(p.getOutputStream(),true).println(password);   
        System.out.println("Password sent");   
        int read;   
        while ((read = in.read(buf)) != -1) 
        {     
            System.out.print(new String(buf, 0, read));     
            System.out.flush();     
            if (read == 0) 
                Thread.sleep(100);   
        }   
           
        loggedIn= false;

It has changed a bit since the beginning, but the problem is still the same.

The program detects no data sent from the terminal to my program when the second request is sent.

[Norm]

Where do you flush the data sent? Where is ending newline?

[mtrompe]

The data is flush with new PrintWriter(p.getOutputStream(),true).println(pass word);
the true parameter means automatic flush
The ending new line is automatic with the println

[Norm]

Try reading and printing the error stream to see if there are any errors.

[mtrompe]

I tried printing the error stream, but nothing is printed, and the program seems to be stuck on the printing, as if blocked into a infinite loop

[Norm]

What does it print in the loop?