您可以使用父级的X / Y / width / height属性来执行此操作。除了使用
Stage#centerOnScreen，您可以执行以下操作：
public class CenterStage extends Application { @Override public void start(final Stage stage) throws Exception { stage.setX(300); stage.setWidth(800); stage.setHeight(400); stage.show(); final Stage childStage = new Stage(); childStage.setWidth(200); childStage.setHeight(200); childStage.setX(stage.getX() + stage.getWidth() / 2 - childStage.getWidth() / 2); childStage.setY(stage.getY() + stage.getHeight() / 2 - childStage.getHeight() / 2); childStage.show(); } public static void main(String[] args) { Application.launch(args); }}
