Java.nio read/write question

Question

Hello,
I just started to learn the java.nio package so I decided to make a simple Echo server. I made a client which reads a line from the keyboard, sends it to the server and the server returns it. It all works except one little detail. Here's little code from the server:
                             int n = client.read(buffer);
                             if ( n > 0)
                                 buffer.flip();
                                 client.write(buffer);
                                 Charset charset = Charset.forName("ISO-8859-1");
                                 CharsetDecoder decoder = charset.newDecoder();
                                 charBuffer = decoder.decode(buffer);
                                 System.out.println(charBuffer.toString());
                                 buffer.clear();
                              }So that works, I send the data and then I receive it back. But only for the client. I also wanted the server to print the line which is the reason for the charset and the decoder. The above code however prints only a blank line. Thus I tried this:
                             int n = client.read(buffer);
                             if ( n > 0)
                                 buffer.flip();
                                 Charset charset = Charset.forName("ISO-8859-1");
                                 CharsetDecoder decoder = charset.newDecoder();
                                 charBuffer = decoder.decode(buffer);
                                 System.out.println(charBuffer.toString());
                                 client.write(buffer);
                                 buffer.clear();
                              }Or in other words I just moved the write() part downwards. So far so good, now the server was actually printing the lines that the client was sending but nothing was sent back to the client.
The question is how to make both, the send back line and the print line on the server side to work as intended. Also a little explanation why the events described above are happening is going to be more than welcome :)
Thanks in advance!

Answer 1

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