java - why does my textArea not work in real time? -

i trying append string client program. made append statement in while loop. have affect in not working in real time?

for areas

   tffixmsg.append( inputline + "\n\n\n"); 

and

       tfcsvline.append(outputline+"\n\n\n"); 

it not show message on textarea until while loop done. how can make continue recieve messages client, , able output onto textarea in realtime

try {     while ((inputline = in.readline()) != null)            {             system.out.println ("server: " + inputline);               tffixmsg.append( inputline + "\n\n\n");              int pos = inputline.indexof(inputline, 0);            h.addhighlight(50, 60, defaulthighlighter.defaultpainter);               if (inputline.trim().equals("bye.")) {                system.out.println("exit program");                 break;                }              scanner input1 = new scanner(new file(csvname));            scanner input2 = new scanner(new file(csvname));            scanner input3 = new scanner(new file(csvname));            scanner input4 = new scanner(new file(csvname));              string csvline = getcsvlineval (getlocation34csv(gettag34value(tag34location(gettagcsv( parsefixmsg(inputline ,inputline))), getvaluecsv( parsefixmsg(inputline ,inputline))), getval34(input1,  input2)), getcsvline( input3,  input4) );            outputline = compareclientfixcsv( gettagcsv( parsefixmsg(inputline ,inputline)), getvaluecsv(parsefixmsg(inputline ,inputline)), getcsvtag(csvline), getcsvvalue(csvline));             out.println(outputline);            tfcsvline.append(outputline+"\n\n\n");             input1.close();            input2.close();            input3.close();            input4.close();              } } catch (filenotfoundexception e) {     // todo auto-generated catch block     e.printstacktrace(); } 

i guess, code runs not on edt thread. if runs, should move other one.

then, can use other thread in order update swing ui elements:

swingutilities.invokelater(new runnable() {     public void run() {         tffixmsg.append( inputline + "\n\n\n");         // or whatever swing action want perform...     } }); 

if need more sophisticated solutions try using swingworker class.