Question

我有一个JavaFX应用程序，它附加了几个方法，并且有一个方法，比如调用所有方法的所有方法喜欢

DFF
Lookup
Profile
Everything

Everything调用所有这些方法我尝试在Everything方法上实现线程来调用这些方法然后在List s popuplated之后我将控件转移到另一个fxml来显示它在表视图中使用选项卡窗格。

public void runEverything(){
    List<Task> tasks = new ArrayList();

    Task task = new Task() {
        protected Object call() throws Exception {                
            dataAOL = aol.getAolReport(InstanceController.validateto, InstanceController.validatefrom, pattern.getText());
            System.out.println("Method"+AOLScreenController.dataAOL.size());             

            return null;
        } 

    };
    Task task1 = new Task() {
        protected Object call() throws Exception {                
            dataProfile = aol.getAolReport(InstanceController.validateto, InstanceController.validatefrom, pattern.getText());
            System.out.println("Method"+AOLScreenController.dataAOL.size());                

            return null;
        } 

    };

    tasks.add(task);
    tasks.add(task1);

    ExecutorService threadPool = Executors.newFixedThreadPool(5);
    for (Task t : tasks) {               
        threadPool.submit(t);
    }
    threadPool.shutdown();
}

我需要在所有线程完成执行后只调用Platform.runLater方法一次，这样我就可以加载fxml视图，同时进度条将在新的fxml中循环，ui不会滞后。但我不知道在哪里放置我的Platform.runLater代码

Platform.runLater(new Runnable() {
     @Override public void run() {
         try {
             Parent parent = FXMLLoader.load(getClass().getResource("AolRun.fxml"));
             SmartCC.fxmlval.add("AOLScreen.fxml");
             SmartCC.stageval.add((Stage) run.getScene().getWindow());
             Stage stage = new Stage();
             stage.initStyle(StageStyle.UTILITY);
             stage = (Stage) run.getScene().getWindow();
             Scene scene = new Scene(parent);
             stage.setScene(scene);
             scene.getStylesheets().add("/css/Style.css");
             stage.setTitle("AOL Output ");
             stage.setResizable(false);
             stage.show();
         } catch (IOException ex) {
             Logger.getLogger(AOLScreenController.class.getName()).log(Level.SEVERE, null, ex);
         }
     }
 });

如果我把它放在最后一个任务中，就会出现线程同步错误，我不知道我是线程和javafx线程的新手，请帮忙

Answer 1

您只需在任务中添加onSucceded处理程序即可。成功完成任务后，此处理程序在应用程序线程上运行：

public void runEverything() {
    ...

    EventHandler<WorkerStateEvent> handler = new EventHandler<WorkerStateEvent>() {
         private int remainingTasks = tasks.size();

         @Override
         public void handle(WorkerStateEvent event) {
              if ((--remainingTasks) == 0) {
                  try {
                      Parent parent = FXMLLoader.load(getClass().getResource("AolRun.fxml"));
                      SmartCC.fxmlval.add("AOLScreen.fxml");
                      SmartCC.stageval.add((Stage) run.getScne().getWindow());
                      Stage stage = new Stage();
                      stage.initStyle(StageStyle.UTILITY);
                      stage = (Stage) run.getScene().getWindow();
                      Scene scene = new Scene(parent);
                      stage.setScene(scene);
                      scene.getStylesheets().add("/css/Style.css");
                      stage.setTitle("AOL Output ");
                      stage.setResizable(false);
                      stage.show();
                  } catch (IOException ex) {
                      Logger.getLogger(AOLScreenController.class.getName()).log(Level.SEVERE, null, ex);
                  }
              }
         }

    };

    ExecutorService threadPool = Executors.newFixedThreadPool(5);
    for (Task t : tasks) {
        t.setOnSuceeded(handler);
        threadPool.submit(t);
    }
    threadPool.shutdown();
}

在javaFX应用程序中为多个任务调用Platform.runLater

1 个答案: