如果关键帧动画可以在FML中指定，那么许多包含动画的文件格式就可以移植到FML，而不会丢失信息.我知道RotateTransition等更简单的变体.

将KeyValue目标声明为$text.translateX(或我能想到的其他变体)的最简单方法会导致类型判断运行时错误. 经过一番摆弄，我设法想出了不会出错的代码，但目标绑定似乎也没有发生.我为此在控制器中添加了一行，以便可以轻松测试想要的行为.如何才能摆脱这一行并使其仅与FML一起工作？它不应该也适用于$text.translateX吗？

animated.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.animation.*?>
<?import javafx.beans.property.SimpleDoubleProperty?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.Group?>
<?import javafx.scene.Scene?>
<?import javafx.scene.text.Text?>
<?import javafx.util.Duration?>
<?import java.lang.Double?>
<Scene xmlns:fx="http://javafx.com/fxml" fx:controller="org.example.demo.AnimatedController">
    <height>240.0</height>
    <width>320.0</width>
    <fx:define>
        <SimpleDoubleProperty fx:id="count"/>
        <Timeline fx:id="timeline">
            <keyFrames>
                <fx:define>
                    <Double fx:id="endValue0" fx:value="0.0"/>
                    <Double fx:id="endValue1" fx:value="100.0"/>
                </fx:define>
                <KeyFrame fx:id="keyFrame0">
                    <values>
                        <KeyValue fx:id="keyValue0" endValue="$endValue0">
                            <target>
                                <fx:reference source="count"/>
                            </target>
                        </KeyValue>
                    </values>
                    <time>
                        <Duration fx:constant="ZERO"/>
                    </time>
                </KeyFrame>
                <KeyFrame fx:id="keyFrame1">
                    <values>
                        <KeyValue fx:id="keyValue1" endValue="$endValue1">
                            <target>
                                <fx:reference source="count"/>
                            </target>
                        </KeyValue>
                    </values>
                    <time>
                        <Duration millis="1000"/>
                    </time>
                </KeyFrame>
            </keyFrames>
        </Timeline>
    </fx:define>
    <Group>
        <Text fx:id="text" y="60" x="${count.value}">Hello, World!</Text>
        <Button onAction="#play">Play</Button>
    </Group>
</Scene>

AnimatedController.java

package org.example.demo;

import javafx.animation.Timeline;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.text.Text;

public class AnimatedController {

    @FXML
    private Text text;

    @FXML
    private Timeline timeline;

    @FXML
    private SimpleDoubleProperty count = new SimpleDoubleProperty(0);

    public void play(ActionEvent ignoredActionEvent) {
        text.xProperty().bind(count); // without this line, text.getX() doesn't get updated
        count.addListener((_, oldVal, newVal) -> System.out.printf("%s, %s, %s\n", text.getX(), oldVal, newVal));
        timeline.play();
    }
}

HelloApplication.java

package org.example.demo;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.stage.Stage;

import java.io.IOException;

public class HelloApplication extends Application {
    @Override
    public void start(Stage stage) throws IOException {
        FXMLLoader fxmlLoader = new FXMLLoader(HelloApplication.class.getResource("animated.fxml"));
        Scene scene = fxmlLoader.load();
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch();
    }
}