本文实例为大家分享了JavaFX实现简易时钟效果的具体代码，供大家参考，具体内容如下

效果图

用当前时间创建时钟，绘制表盘。
钟表是静止的。让指针动起来，请参照：绘制简易时钟（二）

主函数文件 ShowClock:

package primier;import javafx.application.Application;import javafx.geometry.Insets;import javafx.geometry.Pos;import javafx.scene.Scene;import javafx.stage.Stage;import javafx.scene.paint.Color;import javafx.scene.layout.*;import javafx.scene.control.*;import javafx.scene.image.Image;import javafx.scene.image.ImageView;import javafx.scene.shape.Line;public class ShowClock extends Application { @Override //Override the start method in the Application class public void start(Stage primaryStage) { // 创建时钟面板 ClockPane clock = new ClockPane(); // 当前时间整理为字符串 String timeString = clock.getHour() + ":" + clock.getMinute() + ":" + clock.getSecond(); Label lbCurrentTime = new Label(timeString); BorderPane pane = new BorderPane(); pane.setCenter(clock); pane.setBottom(lbCurrentTime); // 将时钟字符串设为靠上居中 BorderPane.setAlignment(lbCurrentTime, Pos.TOP_CENTER); Scene scene = new Scene(pane, 250,250); primaryStage.setTitle("Display Clock"); primaryStage.setScene(scene); primaryStage.show(); } public static void main (String[] args) { Application.launch(args); }}

ClockPane 类

package primier;import java.util.Calendar;import java.util.GregorianCalendar;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;public class ClockPane extends Pane { private int hour; private int minute; private int second; // 时钟面板的宽度和高度 private double w = 250, h = 250; /** 用当前时间创建时钟 */ public ClockPane() { setCurrentTime(); } /** Return hour */ public int getHour() { return hour; } /** Return minute */ public int getMinute() { return minute; } /** Return second */ public int getSecond() { return second; } /** Set the current time for the clock */ public void setCurrentTime() { // 用当前时间创建Calendar类 Calendar calendar = new GregorianCalendar(); this.hour = calendar.get(Calendar.HOUR_OF_DAY); this.minute = calendar.get(Calendar.MINUTE); this.second = calendar.get(Calendar.SECOND); paintClock(); } /** 绘制时钟 */ protected void paintClock() { double clockRadius = Math.min(w,h)*0.4; // 时钟半径 // 时钟中心x, y坐标 double centerX = w/2; double centerY = h/2; // 绘制钟表 Circle circle = new Circle(centerX, centerY, clockRadius); circle.setFill(Color.WHITE); // 填充颜色 circle.setStroke(Color.BLACK); // 笔画颜色 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"); // 秒针 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.GRAY); // 分针 double mLength = clockRadius * 0.65; double minuteX = 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, minuteX, minuteY); mLine.setStroke(Color.BLUE); // 时针 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); sLine.setStroke(Color.GREEN); // 将之前的结点清空，绘制新创建的结点 getChildren().clear(); getChildren().addAll(circle, t1, t2, t3, t4, sLine, mLine, hLine); }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。