相关疑难解决方法(0)

我在使用JavaFX Preloader时遇到了麻烦.在启动阶段,应用程序必须连接到数据库并读取很多,所以我认为在此期间显示启动画面会很好.问题是ProgressBar自动进入100%,我不明白为什么.

应用类.线程休眠将在以后用实际代码替换(DB连接等)

public void init() throws InterruptedException
{
   notifyPreloader(new Preloader.ProgressNotification(0.0));
   Thread.sleep(5000);
   notifyPreloader(new Preloader.ProgressNotification(0.1));
   Thread.sleep(5000);
   notifyPreloader(new Preloader.ProgressNotification(0.2));
}

预载

public class PreloaderDemo extends Preloader {

ProgressBar bar;
Stage stage;

private Scene createPreloaderScene() {
    bar = new ProgressBar();
    bar.getProgress();
    BorderPane p = new BorderPane();
    p.setCenter(bar);
    return new Scene(p, 300, 150);        
}

@Override
public void start(Stage stage) throws Exception {
    this.stage = stage;
    stage.setScene(createPreloaderScene());        
    stage.show();
}

@Override
public void handleStateChangeNotification(StateChangeNotification scn) {
    if (scn.getType() == StateChangeNotification.Type.BEFORE_START) {
        stage.hide();
    }
}

@Override
public …