Method handle

Modder/modder/src/main/java/modder/App.java:312–316

(ActionEvent event)

			btn.setOnAction(new EventHandler<ActionEvent>() {

				@Override
				public void handle(ActionEvent event) {
					System.out.println(
							"width: " + scene.getWidth() + " height: " + scene.getHeight());
				}
			});

			root.getChildren().add(btn);