java - HttpURLConnection Closing IO Streams -

i new java , httpurlconnection. should close opened io streams before dropping connection. if close streams, should need drop connection well? proper way of implementation?

try { string uri = "http://localhost:8081/resteasy/saju/post/text"; url url = new url(uri); connection =     (httpurlconnection) url.openconnection(); connection.setrequestmethod("post"); connection.setrequestproperty("accept", "text/plain"); connection.setrequestproperty("content-type", "text/plain"); connection.setdooutput(true);  outputstream os = connection.getoutputstream();  //bla bla  system.out.println(connection.getresponsecode()); inputstream istream = connection.getinputstream();  //bla bla  } catch (malformedurlexception e) {     // todo auto-generated catch block     e.printstacktrace(); } catch (ioexception e) {     // todo auto-generated catch block     e.printstacktrace(); }finally{     // os.close(); - required     // istream.close(); - required     connection.disconnect();     } } 

you should call close() on input/output/error streams when finished using them.

disconnect more complicated. according javadoc disconnect():

"indicates other requests server unlikely in near future."

this recognizing fact http 1.1 spec has "persistent connection" feature allows same tcp/ip connection used in sequence of requests same server. (this happens transparently.) when call disconnect, taken hint close connection.

so resource , performance perspective:

• it idea call disconnect if aren't send request same server,
• it bad idea if request in near future.