JavaFX 2.2 Stage always on top

问题

I have a normal JFrame (one part of the app) and a second JavaFX window (I can't use a JFrame for the JavaFX stage). The problem is that the JavaFX window should always be on top of all other windows.

I have no idea how I should solve this problem! Any ideas?

回答1:

I know this is a old thread, but things keep on changing. Coming to JDK 8u20 is a new method primaryStage.setAlwaysOnTop(true);

This would be the easiest way to make a stage always on top. For early access to 8u20 visit the website.

public class KeyholeDemo extends Application {
    @Override public void start(Stage primaryStage) {
        primaryStage.initStyle(StageStyle.TRANSPARENT);
        primaryStage.setAlwaysOnTop(true);

        // code omitted...
    }

    public static void main(String[] args) {
        launch(args);
    }
}

Sample code taken from this nice writeup

回答2:

I have a similar problem right now.

I use this line of code to get an always on top effect:

stage.initModality(Modality.APPLICATION_MODAL);

It works fine for me.

Here is the doc.

回答3:

Like this (I'm using Alert)

 Stage stage = (Stage) alert.getDialogPane().getScene().getWindow();
 stage.setAlwaysOnTop(true);

If you want it on top always blocking other windows, just set:

alert.initModality(Modality.APPLICATION_MODAL);

回答4:

AFAIK, there is no API to have JavaFX stage always on top. But you can put JavaFX scene inside JFrame by using JFXPanel.

来源：https://stackoverflow.com/questions/12819194/javafx-2-2-stage-always-on-top