Demonstrates fading in and out a label while at the same time gradually resizing it to nothing and restoring it.

HideAndSeek.java

import javafx.animation.*;
import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.beans.value.*;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.Duration;

public class HideAndSeek extends Application {
  public static void main(String[] args) { Application.launch(HideAndSeek.class, args); }
 
  @Override public void start(Stage stage) {
    Label label = new Label(TEXT);

    ToggleButton visibilityControl = new ToggleButton("Hide");
    visibilityControl.textProperty().bind(
      Bindings.when(
        visibilityControl.selectedProperty()
      ).then("Show")
       .otherwise("Hide")
    );

    VBox layout = new VBox(10);
    layout.setAlignment(Pos.CENTER);
    layout.setStyle("-fx-background-color: cornsilk; -fx-padding: 10;" );
    layout.getChildren().setAll(label, visibilityControl);
    
    stage.setScene(new Scene(layout));
    stage.show();
    
    final double standardWidth  = label.getWidth();
    final double standardHeight = label.getHeight();
    label.setMaxSize(standardWidth, standardHeight);
    
    final Timeline hide = new Timeline(
      new KeyFrame(
        Duration.seconds(3), 
        new KeyValue(label.opacityProperty(),   0),
        new KeyValue(label.maxWidthProperty(),  0),
        new KeyValue(label.maxHeightProperty(), 0)
      )
    );
            
    final Timeline show = new Timeline(
      new KeyFrame(
        Duration.seconds(3), 
        new KeyValue(label.opacityProperty(),   1),
        new KeyValue(label.maxWidthProperty(),  standardWidth),
        new KeyValue(label.maxHeightProperty(), standardHeight)
      )
    );

    visibilityControl.selectedProperty().addListener(new ChangeListener<Boolean>() {
      @Override public void changed(ObservableValue<? extends Boolean> ov, Boolean wasSelected, Boolean selected) {
        if (selected) {
          hide.play();
        } else {
          show.play();
        }
      }
    });
  }
  
  private static final String TEXT = 
    "  WITCH.  Fillet of a fenny snake,\n" +
    "In the caldron boil and bake;\n" +
    "Eye of newt, and toe of frog,\n" +
    "Wool of bat, and tongue of dog,\n" +
    "Adder's fork, and blind-worm's sting,\n" +
    "Lizard's leg, and owlet's wing,—\n" +
    "For a charm of powerful trouble,\n" +
    "Like a hell-broth boil and bubble.\n\n" +
    "  ALL.  Double, double toil and trouble;\n" +
    "Fire burn, and caldron bubble. ";
}