cgange background from button click java fx
BackgroundImage backgroundImage = new BackgroundImage( new Image( getClass().getResource("/testing/background.jpg").toExternalForm()), BackgroundRepeat.NO_REPEAT, BackgroundRepeat.NO_REPEAT, BackgroundPosition.DEFAULT, BackgroundSize.DEFAULT);
Background background = new Background(backgroundImage);
Button button = new Button( "Click me!");
button.setBackground(background);