JavaFX Pane extend to create custom Clock control

import java.util.Calendar;
import java.util.GregorianCalendar;

import java.time.LocalTime;

import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Line;
import javafx.scene.text.Text;
import javafx.stage.Stage;

public class Main extends Application {
  @Override/* w ww.  j a  v a  2 s  . co m*/
  public void start(Stage primaryStage) {
    // Create a clock and a label
    ClockPane clock = new ClockPane();
    String timeString = clock.getHour() + ":" + clock.getMinute() + ":" + clock.getSecond();
    Label lblCurrentTime = new Label(timeString);

    // Place clock and label in border pane
    BorderPane pane = new BorderPane();
    pane.setCenter(clock);
    pane.setBottom(lblCurrentTime);
    BorderPane.setAlignment(lblCurrentTime, Pos.TOP_CENTER);

    Scene scene = new Scene(pane, 250, 250);
    primaryStage.setTitle("DisplayClock");
    primaryStage.setScene(scene);
    primaryStage.show();
  }

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

class ClockPane extends Pane {
  private int hour;
  private int minute;
  private int second;

  public ClockPane() {
    setCurrentTime();
  }

  public ClockPane(int hour, int minute, int second) {
    this.hour = hour;
    this.minute = minute;
    this.second = second;
  }

  public int getHour() {
    return hour;
  }

  public void setHour(int hour) {
    this.hour = hour;
    paintClock();
  }

  public int getMinute() {
    return minute;
  }

  public void setMinute(int minute) {
    this.minute = minute;
    paintClock();
  }

  public int getSecond() {
    return second;
  }

  public void setSecond(int second) {
    this.second = second;
    paintClock();
  }

  public void setCurrentTime() {
    LocalTime time = LocalTime.now();

    this.hour = time.getHour();
    this.minute = time.getMinute();
    this.second = time.getSecond();

    paintClock(); // Repaint the clock
  }

  private void paintClock() {
    double clockRadius = Math.min(getWidth(), getHeight()) * 0.8 * 0.5;
    double centerX = getWidth() / 2;
    double centerY = getHeight()/2;
    Circle circle = new Circle(centerX, centerY, clockRadius);
    circle.setFill(Color.WHITE);
    circle.setStroke(Color.BLACK);
    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 + 3, "3");
    Text t4 = new Text(centerX - 3, centerY + clockRadius - 3, "6");

    // Draw second hand
    double sLength = clockRadius * 0.8;
    double secondX = centerX + sLength * Math.sin(second * (2 * Math.PI / 60));
    double secondY = centerY - sLength * Math.cos(second * (2 * Math.PI / 60));
    Line sLine = new Line(centerX, centerY, secondX, secondY);
    sLine.setStroke(Color.RED);

    // Draw minute hand
    double mLength = clockRadius * 0.65;
    double xMinute = centerX + mLength * Math.sin(minute * (2 * Math.PI / 60));
    double minuteY = centerY - mLength * Math.cos(minute * (2 * Math.PI / 60));
    Line mLine = new Line(centerX, centerY, xMinute, minuteY);
    mLine.setStroke(Color.BLUE);

    // Draw hour hand
    double hLength = clockRadius * 0.5;
    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);
  }

  @Override
  public void setWidth(double width) {
    super.setWidth(width);
    paintClock();
  }

  @Override
  public void setHeight(double height) {
    super.setHeight(height);
    paintClock();
  }
}