java - Is there a differnt way of writing this code such that it doesn't use a loop -

i trying append string client program. made append statement in while loop. affects program, not sending message realtime onto jtextarea.

how can make program such not use while loop or loop , continue accept messages client , output textarea in real time? perhaps if statement?

while loop area

while ((inputline = in.readline()) != null)  

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 suspect code being processed on ui thread. ui thread updates , renders screen. you've while loop running on ui thread, ui cannot update. busy running while loop.

the answer start thread processing. then, use swingworker onto ui thread, , update textbox. necessary because shouldn't update ui objects off ui thread.

here's tutorial started. explain more thoroughly.