寧愿這是一個(gè)非常簡單的概念,但是由于我對(duì)JavaFX的并發(fā)性完全陌生.我一直在努力理解這個(gè)概念.

在構(gòu)建一個(gè)非常簡單的JavaFX應(yīng)用程序時(shí),我想在后臺(tái)執(zhí)行一些冗長的任務(wù),并使UI免受凍結(jié).

在下面的示例中,我試圖創(chuàng)建一個(gè)簡單的后臺(tái)任務(wù)服務(wù),然后使用ControlsFX Dialog在主UI窗口上顯示進(jìn)度欄.

但是,我想知道如何為該服務(wù)提供一些輸入?yún)?shù)并從中獲取布爾輸出.這在C#BackgroundWorker中確實(shí)很簡單,但是在JavaFX中仍然無法弄清楚.任何提示將是一個(gè)很大的幫助.

嘗試了這個(gè)簡單的例子

public void runTask(Stage stage) throws URISyntaxException, IOException {

Service service = new Service() {

@Override

protected Task createTask() {

return new Task() {

@Override

protected Void call() throws InterruptedException, URISyntaxException, IOException {

// some time consuming task here

// use the input arguments and perform some action on it

// then set the process result to a Boolean and return after the task is completed

// also keep hold back any other process to from executing on UI

return null;

}

};

}

};

Dialogs.create()

.owner(stage)

.title("Performing Task!")

.masthead("Please wait...")

.showWorkerProgress(service);

service.setOnSucceeded(new EventHandler() {

@Override

public void handle(WorkerStateEvent event) {

System.out.println("done:" + event.getSource().getValue());

}

});

service.setOnFailed(new EventHandler() {

@Override

public void handle(WorkerStateEvent event) {

throw new UnsupportedOperationException("Failed."); //To change body of generated methods, choose Tools | Templates.

}

});

service.setOnCancelled(new EventHandler() {

@Override

public void handle(WorkerStateEvent event) {

throw new CancellationException("Cancelled."); //To change body of generated methods, choose Tools | Templates.

}

});

service.start();

}

總結(jié)

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