import javafx.scene.shape.Circle;

import javafx.scene.shape.Line;

import javafx.scene.text.Text;

import javafx.scene.control.Label;

import javafx.scene.layout.Pane;

import javafx.scene.paint.Color;

import java.util.Calendar;

import java.util.GregorianCalendar;

public class ClockPane extends Pane{

    private int hour;

    private int minute;

    private int second;

    //设置时钟面板的宽度和高度

    private double w = 250, h = 250;

    //构造函数

    public ClockPane() {

        setCurrentTime();

    }

    //设置带参数的构造函数

    public ClockPane(int hour, int minute, int second) {

        this.hour = hour;

        this.minute = minute;

        this.second = second;

        paintClock();

    }

    //返回小时

    public int getHour() {

        return hour;

    }

    //返回分钟

    public int getMinute() {

        return minute;

    }

    //返回秒钟

    public int getSecond() {

        return second;

    }

    //设置一个新的小时

    public void setHour(int hour) {

        this.hour = hour;

        paintClock();

    }

    //设置一个新的分钟

    public void setMinute(int minute) {

        this.minute = minute;

        paintClock();

    }

    //设置一个新的秒钟

    public void setSecond(int second) {

        this.second = second;

        paintClock();

    }

    //返回时钟面板的宽度

    public double getW() {

        return w;

    }

    //设置一个新的面板宽度

    public void setW(double w) {

        this.w = w;

        paintClock();

    }

    //返回时钟面板的高度

    public double getH() {

        return h;

    }

    //设置时钟面板的高度

    public void setH(double h) {

        this.h = h;

        paintClock();

    }

    public void setCurrentTime() {

        //获取当前时间

        Calendar calendar = new GregorianCalendar();

        //设置当前时间

        this.hour = calendar.get(Calendar.HOUR_OF_DAY);

        this.minute = calendar.get(Calendar.MINUTE);

        this.second = calendar.get(Calendar.SECOND);

        //重画

        paintClock();

    }

    public void paintClock() {

        //初始化时钟参数

        double clockRadius = Math.min(w, h) * 0.8 * 0.5;

        double centerX = w / 2;

        double centerY = h / 2;

        //显示当前时间,并设置时间显示的位置

        String timeString = hour + ":" + minute + ":" + second;

        Label labelCurrentTime = new Label(timeString);

        labelCurrentTime.setLayoutX(centerX - 25);

        labelCurrentTime.setLayoutY(centerY + clockRadius + 5);

        //画圆

        Circle circle = new Circle(centerX, centerY, clockRadius);

        //circle.setFill(Color.WHITE);

        //circle.setStroke(Color.BLACK);

        circle.setStyle("-fx-stroke: black; -fx-fill: white");

        Text t1 = new Text(centerX - 5, centerY - clockRadius +12, "12");

        Text t2 = new Text(centerX - clockRadius + 3, centerY + 5, "9");

        Text t3 = new Text(centerX + clockRadius - 10, centerY + 5, "3");

        Text t4 = new Text(centerX - 3, centerY + clockRadius - 3, "6");

        //画秒针

        double sLength = clockRadius * 0.8; //设置秒针的长度

        double secondX = centerX + sLength * Math.sin(second * (2 * Math.PI / 60.0));

        double secondY = centerY - sLength * Math.cos(second * (2 * Math.PI / 60.0));

        Line sLine = new Line(centerX, centerY, secondX, secondY);

        sLine.setStroke(Color.RED);

        //画分针

        double mLength = clockRadius * 0.65; //设置分针的长度

        double minuteX = centerX + mLength * Math.sin(minute * 2 * Math.PI / 60.0);

        double minuteY = centerY - mLength * Math.cos(minute * 2 * Math.PI / 60.0);

        Line mLine = new Line(centerX, centerY, minuteX, minuteY);

        mLine.setStroke(Color.BLUE);

        //画时针

        double hLength = clockRadius * 0.5; //设置时针的长度

        double hourX = centerX + hLength * Math.sin((hour % 12 + minute / 60.0) * 2 * Math.PI / 12);

        double hourY = centerY - hLength * Math.cos((hour % 12 + minute / 60.0) * 2 * Math.PI / 12);

        Line hLine = new Line(centerX, centerY, hourX, hourY);

        hLine.setStroke(Color.GREEN);

        getChildren().clear();

        getChildren().addAll(circle, t1, t2, t3, t4, sLine, mLine, hLine, labelCurrentTime);

    }

}

import javafx.animation.KeyFrame;

import javafx.animation.Timeline;

import javafx.application.Application;

import javafx.event.ActionEvent;

import javafx.event.EventHandler;

import javafx.scene.Scene;

import javafx.scene.layout.BorderPane;

import javafx.stage.Stage;

import javafx.util.Duration;

public class ClockAniamtion extends Application{

    @Override

    public void start(Stage primaryStage) throws Exception {

        ClockPane clock = new ClockPane();

        //将clock放在pane里

        BorderPane pane = new BorderPane();

        pane.setCenter(clock);

        //创建一个handler

        EventHandler<ActionEvent> eventHandler = e -> {

            clock.setCurrentTime();

        };

        Timeline animation = new Timeline(

                new KeyFrame(Duration.millis(1000), eventHandler));

        animation.setCycleCount(Timeline.INDEFINITE);

        animation.play();

        Scene scene= new Scene(pane, 250, 250);

        primaryStage.setTitle("时钟");

        primaryStage.setScene(scene);

        primaryStage.show();

        //让clock跟随窗口的变化而变化

        pane.widthProperty().addListener(ov -> clock.setW(pane.getWidth()));

        pane.heightProperty().addListener(ov -> clock.setH(pane.getHeight()));

    }

    public static void main(String[] args) {

        Application.launch(args);

    }

}