import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ColorPicker;
import javafx.scene.control.Label;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;


public class Bug extends Application {
    
    private ColorPicker colorPicker;
    
    @Override public void start(Stage primaryStage) throws Exception {
        Button set = new Button("set");
        
        colorPicker = new ColorPicker(Color.web("#996699"));
        
        Label label = new Label();
        label.textProperty().bind(Bindings.convert(colorPicker.valueProperty()));
        
        VBox vbox = new VBox();
        vbox.getChildren().setAll(set, label, colorPicker);
        
        set.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent t) {
                colorPicker.setValue(Color.AQUA);
//                colorPicker.valueProperty().set(Color.RED);
            }
        });
        
        primaryStage.setScene(new Scene(vbox, 200, 200));
        primaryStage.show();
        
    }
    
    /**
     * Java main for when running without JavaFX launcher
     */
    public static void main(String[] args) {
        launch(args);
    }
}