java - SMTPClient set timout for an open port -

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my problem is: need discovery if 1 ip , port running smtp service. this, i'm using smtpclient try open connection. i'm using code below.

    private static boolean validatesmtp(string ip, int port, int timeout) {     smtpclient smtp = new smtpclient();      try {         smtp.setconnecttimeout(timeout);                     smtp.connect(ip, port);         return true;      } catch (socketexception e) {         logaplication.warning("ops... wrong", e);     } catch (ioexception e) {         logaplication.warning("ops... wrong", e);     }     finally{         smtp = null;     }      return false; }

it's working fine , i've gotten expected results, timeout has been problem. e.g: if try ip: 127.0.0.1 , port 80 (iis open port) connect step takes long (much more defined in timeout) throw exception

java.net.socketexception: connection reset

how can set timeout case? or existis way simple test ?

after take @ grepcode, found method connect(string host, int port):

opens socket connected remote host @ specified port , originating specified local address , port. before returning, _connect action() called perform connection initialization actions.

as port opened service, socket opened, not causing timeout (by socket), exception thrown "connectaction()" needed set global timeout smtpclient, used socket connection , inside of "connectaction()" . , did solve problem: 

smtp.setdefaulttimeout(timeout);

with this, i've expected results for, open ports throws exceptions , of course, connection smtp services.


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