将行为设置为按钮的JavaFX示例
通常，按钮在用户界面应用程序中进行控制，单击该按钮将执行相应的操作。您可以通过实例化javafx.scene.control.Button类来创建一个Button。
Button类从javafx.scene.control.ButtonBase类继承名为onAction的属性，该属性的类型为ObjectProperty<EventHandler<ActionEvent>>。该属性表示每当您按下按钮时调用的操作。您可以使用setOnAction()方法将值设置为此属性。
将动作设置为按钮的一种方法是使用OnAction()方法。
示例
public class ButtonAction extends Application {
@Override
public void start(Stage stage) {
//创建一个按钮
Button button = new Button("Play");
button.setTranslateX(25);
button.setTranslateY(150);
//创建一个圆
Circle circle = new Circle(150, 150, 30);
circle.setFill(Color.BROWN);
//设置圆的路径
MoveTo moveTo = new MoveTo(15, 15);
LineTo line1 = new LineTo(100, 150);
CubicCurveTo cubicCurveTo = new CubicCurveTo();
cubicCurveTo.setControlX1(400.0f);
cubicCurveTo.setControlY1(40.0f);
cubicCurveTo.setControlX2(175.0f);
cubicCurveTo.setControlY2(250.0f);
cubicCurveTo.setX(500.0f);
cubicCurveTo.setY(150.0f);
VLineTo vLine = new VLineTo();
vLine.setY(80);
Path path = new Path();
path.getElements().addAll(moveTo, line1, cubicCurveTo, vLine);
PathTransition pathTransition = new PathTransition();
pathTransition.setDuration(Duration.millis(1000));
pathTransition.setNode(circle);
pathTransition.setPath(path);
pathTransition.setOrientation(
PathTransition.OrientationType.ORTHOGONAL_TO_TANGENT);
pathTransition.setCycleCount(50);
pathTransition.setAutoReverse(false);
//将操作设置为按钮
button.setOnAction(e -> {
pathTransition.play();
});
//设置舞台
Group root = new Group(button, circle);
Scene scene = new Scene(root, 595, 220, Color.BEIGE);
stage.setTitle("Button Action");
stage.setScene(scene);
stage.show();
}
public static void main(String args[]){
launch(args);
}
}输出结果