java - JavaFx8属性绑定(bind)导致 “No Fx8 Application thread”

我的程序无法正常运行。我编写了一个名为“Uhr”的类，这是一个简单的计时器。为了显示计时器，我还编写了一个名为“UhrMain”的类，该类应创建一个GUI。一切工作正常，但是只要在类“StringProperty”中更改了我的Uhr，我都会收到“No Fx8 Application thread”错误。因此标签不会更新。

为了将时间绑定(bind)到标签，我使用了以下代码:

timeLabel.textProperty().bind(eineUhr.zeitProperty());

我完全不知道为什么这行不通。

Uhr.java:

    /*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package uhr;

import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;

/**
 *
 * @author
 */
public class Uhr extends Thread{

    private final StringProperty zeit;
    private int mSec;
    private int sec;
    private boolean running;

    public Uhr(){
        zeit = new SimpleStringProperty();
        running = false;
    }

    public final StringProperty zeitProperty(){
        return zeit;
    }

    public final String getZeit(){
        return zeit.get();
    }

    public synchronized void startTimer(){
        this.running = true;
    }

    public synchronized void stopTimer(){
        this.running = false;
    }

    @Override
    public void run(){
        while(true){
            try {
                Thread.sleep(100);
                mSec++;
                if(mSec >= 10){
                    mSec = 0;
                    sec++;
                    zeit.set("Zeit: " + sec);
                    System.out.println(zeit.get());
                }
            } catch (InterruptedException ex) {
                Logger.getLogger(Uhr.class.getName()).log(Level.SEVERE, null, ex);
            }

        }
    }

}

MainTest.java

    /*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package uhr;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

/**
 *
 * @author
 */
public class UhrMain extends Application {

    private VBox box;
    private Button startButton;
    private Button stopButton;
    private Label timeLabel;
    private Uhr eineUhr;

    @Override
    public void start(Stage primaryStage) {
        eineUhr = new Uhr();
        eineUhr.start();
        box = new VBox();
        timeLabel = new Label("Zeit: ");
        startButton = new Button("Start");
        //startButton.setStyle("-fx-background-color: green");
        startButton.setOnAction((event) -> eineUhr.startTimer());
        stopButton = new Button("Stopp");
        //stopButton.setStyle("-fx-background-color: red");
        stopButton.setOnAction((event) -> eineUhr.stopTimer());
        box.getChildren().addAll(timeLabel,startButton,stopButton);
        timeLabel.textProperty().bind(eineUhr.zeitProperty());
        Scene scene = new Scene(box);
        primaryStage.setScene(scene);
        primaryStage.setTitle("Stoppuhr");
        primaryStage.show();
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }

}

我非常感谢您的帮助。

最佳答案

此方法应更改:

@Override
public void run(){
    while(true){
        try {
            Thread.sleep(100);
            mSec++;
            if(mSec >= 10){
                mSec = 0;
                sec++;
                Platform.runLater(()->zeit.set("Zeit: " + sec));
                System.out.println(zeit.get());
            }
        } catch (InterruptedException ex) {
            Logger.getLogger(Uhr.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}

它为我解决了崩溃。