Program Explanation Program: //Import required pacakges 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.Line; import javafx.scene.shape.Circle; import javafx.scene.text.Text; import javafx.stage.Stage; import java.util.Calendar; import java.util.GregorianCalendar; //Main class public class E27 extends Application { //Override start method @Override //Start method public void start(Stage primaryStage) { // Create a clock DetailedClockPane clock = new DetailedClockPane(); //Create a string String timeString = clock.get_Hour() + ":" + clock.get_Minute() + ":" + clock.get_Second(); //Add the string to the label Label lblCurrentTime = new Label(timeString); //Create a pane BorderPane pane = new BorderPane(); //Set the clock to the center pane.setCenter(clock); //Set the label at the bottom pane.setBottom(lblCurrentTime); //Set the alignment BorderPane.setAlignment(lblCurrentTime, Pos.TOP_CENTER); // Create a scene Scene scene = new Scene(pane, 250, 250); //Set the title primaryStage.setTitle("Exercise14_27"); //Place the scene on the stage primaryStage.setScene(scene); //Display the stage primaryStage.show(); } //Main method public static void main(String[] args) { //Launch the application launch(args); } } //Create a class class DetailedClockPane extends Pane { //Declare required variables private int clkhour; private int clkminute; private int clksecond; //Constructor public DetailedClockPane() { //Get the time setCurrentTime(); } //Constructor public DetailedClockPane(int h, int m, int s) { //Set the hour this.clkhour = h; //Set the minute this.clkminute = m; //Set the second this.clksecond = s; } //Get hour public int get_Hour() { //Return hour return clkhour; } //Set hour public void set_Hour(int h) { //Set the hour this.clkhour = h; //Call the function paintClock(); } //Get minute public int get_Minute() { //Return minute return clkminute; } //Set minute public void set_Minute(int m) { //Set the minute this.clkminute = m; //Call the function paintClock(); } //Get seconds public int get_Second() { //Return second return clksecond; } //Set second public void set_Second(int s) { //Set the second this.clksecond = s; //Call the function paintClock(); } //Set present time public void setCurrentTime() { //Create a calendar Calendar calendarObj = new GregorianCalendar(); //Set the hour this.clkhour = calendarObj.get(Calendar.HOUR_OF_DAY); //Set the minute this.clkminute = calendarObj.get(Calendar.MINUTE); //Set the second this.clksecond = calendarObj.get(Calendar.SECOND); //Call the function paintClock(); } //Paint the clock private void paintClock() { // Initialize the clock parameters double clkRadius = Math...