java - Writing line, reading line, then closing a socket -

i need connect java tcp/ip socket, in order execute few things:

1) read data socket (the optional 'hello' message), discard it;

2) write single line of data, string, socket;

3) read response socket, single line, , store string;

4) close socket;

i wrote code:

public string writelinetosocket(string s) throws ioexception {          socket socket = null;         outputstreamwriter osw = null;         bufferedreader = null;         string response = null;          try {              socket = new socket(serveraddress, serverport);             = new bufferedreader(new inputstreamreader(socket.getinputstream()));             osw = new outputstreamwriter(socket.getoutputstream(), "utf-8");              osw.write(s, 0, s.length());             osw.flush();              response = is.readline();             system.out.println(response);          } catch (ioexception e) {             e.printstacktrace();         } {             if (socket!=null) socket.close();             if (osw!=null) osw.close();         }          return response;     } 

for example, using netcat dict.org 2628 have first 'hello' message (i'm not interested in it):

220 pan.alephnull.com dictd 1.12.1/rf on linux 4.4.0-1-amd64 <42349519.9983.1492182590@pan.alephnull.com>

then want send command string:

define wn java

finally want store whole response string:

150 1 definitions retrieved 151 "java" wn "wordnet (r) 3.0 (2006)" java n 1: island in indonesia south of borneo; 1 of world's densely populated regions 2: beverage consisting of infusion of ground coffee beans; "he ordered cup of coffee" [syn: {coffee}, {java}] 3: platform-independent object-oriented programming language . 250 ok [d/m/c = 1/0/14; 0.000r 0.000u 0.000s]

my method shows hello message, hangs... doing wrong?

your method called writeline doesn't write line, unless string has line terminator. add one.