JavaFX实现简易时钟效果(一)

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：

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。