How to dynamically change the height of a stage in JavaFx

问题

Is it possible to create a Stage in JavaFx whose height changes dynamically? Or, in other words, is it possible to change the height of a Stage once it has been created (stage.show()), so that the stage morph's into its new height?

回答1:

Use stage.sizeToScene() to resize the stage to whatever the current preferred size of it's root is.

 stage.setScene(new Scene(someContent));
 stage.show();
 ....
 stage.getScene().setRoot(someNewContent));
 stage.sizeToScene();

You can also just call stage.setWidth() or stage.setHeight() if you don't need the automatic sizing behavior of sizeToScene().

You can use a Timeline to animate the stage size change if you need to do that.

来源：https://stackoverflow.com/questions/31360919/how-to-dynamically-change-the-height-of-a-stage-in-javafx