input BufferedReader how to terminate it

Question

I have this piece of code

private String getMessage(BufferedReader in) throws IOException{

     StringBuilder sb = new StringBuilder();

     while(true){
        char pom = (char) in.read();
        sb.append(pom); 

        if (sb.toString().contains("\r\n")) {                  
               String result = sb.toString();
               result = result.replace("\r\n", "");
               return result;
        }
     }   
}

I want user to write on console some message. And when he writes '\r\n' console should end its input. But this doesn't work... Don't you have some tips what could be the problem?

And in aditional, i don't want to use in.close(); coz i will need this input later.

Have you debugged the program to see where it's failing? What does "this doesn't work" mean? — Mark Peters, Mar 31 '14 at 20:12
well, i write and it does nothing. "qdio\r\ndosvp..." and can write still on. — user3472536, Mar 31 '14 at 20:28
http://stackoverflow.com/questions/2828291/readline-like-library-for-java might be of interest. — Mike Samuel, Mar 31 '14 at 20:37

Rudi Angela · Answer 1 · 2014-03-31T20:29:25.820

0

Try this:

private String getMessage(BufferedReader in) throws IOException{
    return in.readLine();
}

OK, if you want to do it byte by byte, then you can try this:

private String getMessage(BufferedReader in) throws IOException{
   StringBuilder sb = new StringBuilder();
   char prev = (char) 0;
   char cur = in.read();
   while (prev != '\r' || cur != '\n') {
      sb.append(cur);
      prev = cur;
      cur = in.read();
   }
   return sb.toString();
}

edited Mar 31 '14 at 20:29

answered Mar 31 '14 at 20:16

Rudi Angela

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Yes, this would be great solution but because of some reasons I need to read informations byte by byte... – user3472536 Mar 31 '14 at 20:19
@user3472536, To read byte-by-byte you need an `InputStream`. `Reader`s read chars, not bytes. – Mike Samuel Mar 31 '14 at 20:37
Same as my code. This is what i wrote on console and can write still on. http://d.pr/i/oNLu – user3472536 Mar 31 '14 at 20:37

input BufferedReader how to terminate it

1 Answers1