binding progress bar with a method, javafx - javafx

Question

I have a method which performs some task(reading, writing files and other tasks also) for almost 3 minutes.
I want to bind progress bar in javafx which can run with progress of the method.
This is my method
System.out.println("Going to load contract/security:"+new Date());
Map<Integer,FeedRefData> map = loadContractAndSecurityFromFile(loadFO);
addIndicesRefData(map);
BufferedWriter writer = createFile();
for (FeedRefData feedRefData : map.values()) {
try {
updateInstrumentAlias(map, feedRefData);
String refDataString = feedRefData.toString();
writer.write(refDataString, 0, refDataString.length());
writer.newLine();
writer.flush();
} catch (IOException e) {
e.printStackTrace();
log.info("Unable to write Quote Object to : " );
}
}
System.out.println("Ref Data File Generated:"+new Date());

Answer 1

For bind your method with progressbar you should do these steps :
Create a task which contains your method.
Create a thread which run this task.
Bind your progress property with your task property.
I made this simple example ,just change my code with your method code :
public class Bind extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) {
ProgressBar pb = new ProgressBar();
pb.setProgress(1.0);
Button button = new Button("start");
button.setOnAction((ActionEvent event) -> {
/*Create a task which contain method code*/
Task<Void> task = new Task<Void>() {
#Override
protected Void call() throws Exception {
File file = new File("C:\\Users\\Electron\\Desktop\\387303_254196324635587_907962025_n.jpg");
ByteArrayOutputStream bos = null;
try {
FileInputStream fis = new FileInputStream(file);
byte[] buffer = new byte[1024];
bos = new ByteArrayOutputStream();
for (int len; (len = fis.read(buffer)) != -1;) {
bos.write(buffer, 0, len);
updateProgress(len, file.length());
/* I sleeped operation because reading operation is quiqly*/
Thread.sleep(1000);
}
System.out.println("Reading is finished");
} catch (FileNotFoundException e) {
System.err.println(e.getMessage());
} catch (IOException e2) {
System.err.println(e2.getMessage());
}
return null;
}
};
Thread thread = new Thread(task);
thread.start();
/*bind the progress with task*/
pb.progressProperty()
.bind(task.progressProperty());
});
HBox box = new HBox(pb, button);
Stage stage = new Stage();
StackPane root = new StackPane();
root.getChildren().add(box);
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
}
Operation started :
Operation finished :
PS: I used Thread.sleep(1000) because my file is so small.You can remove it if your progress time is long.