java - How to solve JavaFX ProgressIndicator repainting issues while downloading? -

i downloading file ftp client loop

private void download(string date){     try {         ftpfile ftpfile = client.mlistfile(filename());         long ftpfilesize = ftpfile.getsize();         frame.setmaximumprogress((int) ftpfilesize);         file downloadfile = new file(folder + filename());         outputstream outputstream2 = new bufferedoutputstream(new fileoutputstream(downloadfile));         inputstream inputstream = client.retrievefilestream(filename);         byte[] bytesarray = new byte[4096];         int bytesread = -1;         int bytes = 0;         while ((bytesread = inputstream.read(bytesarray)) != -1){             outputstream2.write(bytesarray, 0, bytesread);             bytes += bytesread;         }         if (client.completependingcommand()){             outputstream2.close();             inputstream.close();         } else{             joptionpane.showmessagedialog(null, "downloading error.");         }     } catch (ioexception e) {         if(e instanceof ftpconnectionclosedexception){             reconnect();         }     } } 

progressindicator still on 1 position. method setprogress priniting progress.

public void setprogress(double value){     system.out.println(value);     progress.setprogress(value); } 

just use task class meant to, no need reinvent wheel..

public class downloadtask extends task<void> {   public void call() {     while ((bytesread = inputstream.read(bytesarray)) != -1){       outputstream2.write(bytesarray, 0, bytesread);       bytes += bytesread;       updateprogress(bytes, ftpfilesize);     }   } } 

and bind progressproperty() of task progressproperty() of progressindicator.

example on how bind 2 properties:

progressindicator progress = new progressindicator(); downloadtask task = new downloadtask(); progress.progressproperty().bind(task.progressproperty()); new thread(task).start();