JAVA课程设计时钟的设计实现

1、 . . . JAVA程序设计 课程设计（论文）目 录第1章课程设计的目的与要求11.1 课程设计目的11.2 课程设计的实验环境11.3 课程设计的预备知识11.4 课程设计要求1第2章课程设计容22.1课程设计主要容22.2概要设计22.2.1自定义类说明22.3详细设计32.4测试分析162.4.1程序运行情况162.4.2程序异常处理16第3章课程设计总结17参考资料18第1章 课程设计的目的与要求1.1 课程设计目的JAVA程序设计是计算机相关专业的必修专业基础课程，其实践性、应用性很强。实践教学环节是必不可少的一个重要环节。本课程的程序设计专题实际是计算机相关专业学生学习完JAVA

2、程序设计课程后，进行的一次全面的综合训练，JAVA程序设计的设计目的是加深对理论教学容的理解和掌握，使学生较系统地掌握程序设计与其在网络开发中的广泛应用，基本方法与技巧，为学生综合运用所学知识，利用软件工程为基础进行软件开发、并在实践应用方面打下一定基础。1.2 课程设计的实验环境硬件要求能运行Windows 9.X操作系统的微机系统。JAVA程序设计语言与相应的集成开发环境，J2SDK和ECLIPSE开发工具。1.3 课程设计的预备知识熟悉JAVA语言与ECLIPSE开发工具。1.4 课程设计要求按课程设计指导书提供的课题，要求学生在自行完成各个操作环节，并能实现且达到举一反三的目的，完成一

3、个项目解决一类问题。要求学生能够全面、深入理解和熟练掌握所学容，并能够用其分析、设计和解答类似问题；对此能够较好地理解和掌握，能够进行简单分析和判断；能编写出具有良好风格的程序；掌握JAVA程序设计的基本技能和面向对象的概念和方法；了解多线程、安全和网络等编程技术。同时培养学生进行分析问题、解决问题的能力；培养学生进行设计分析、设计方法、设计操作与测试、设计过程的观察、理解和归纳能力的提高。第2章 课程设计容2.1课程设计主要容我设计的时钟有的界面良好，比较简洁美观，程序有很强的实用性，实现程序与电脑的时间的同步。可以显示时钟，也可以显示分针秒针，并可以在相应位置调整时间。而且初始运行会自动与

4、电脑的时间校对，一般默认为同步，但还可以自己再次调节，提高了实用性。本系统共包括1个java源文件。1、Clock源文件是本程序的主函数其作用是初始化棋盘。2、setCurrentTime源文件实现电脑设置时间。3、paintHourPointer源文件为时针.4、paintSecondPointer源文件实现人与电脑设置秒针.5、paintMinuteDot源文件人与电脑设置分针.2.2概要设计2.2.1自定义类说明* * 类名: Clock * * 作用: 自定义主类,对鼠标拖拽的初始界面进行声明* * 继承的父类: JComponent类 * * 实现的接口: 没有 * *表1-成员变量

5、表表2.1 Clock成员变量成员变量描述变量类型名称时针StringHour分针StringMinute秒针StringSecond时间点TextFieldtext_1表2-方法表表2 Clock方法方法名功能备注setCurrentTime设置当前时间构造方法paintHourPointer设置时针接口方法paintSecondPointer设置秒针接口方法paintMinuteDot设置分针接口方法actionPerformed事件处理run程序运行2.3详细设计import java.awt.*; import java.awt.geom.Ellipse2D; import java.

6、awt.geom.GeneralPath; import java.awt.geom.Line2D; import java.awt.geom.Rectangle2D; import java.util.Calendar; import java.util.Date; import javax.swing.BorderFactory; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.UIManager; public class Clock extends JComponent priva

7、te static final Color INTEGRAL_COLOR = new Color(0, 128, 128); private int radius; private Calendar currentTime = Calendar.getInstance(); private double s = 0.03; public Clock(int radius) this.radius = radius; public void setCurrentTime(Date time) /设置当前时间 this.currentTime.setTime(time); public void

8、setCurrentTime(long millis) this.currentTime.setTimeInMillis(millis); public Dimension getPreferredSize() Insets insets = getInsets(); int r = (int) (radius = -1 ? 0 : radius*(1+s)+1; return new Dimension(r * 2 + insets.left + insets.right,r * 2 + insets.top + insets.bottom); /返回一个指定宽、高的Dimension pr

9、otected void paintComponent(Graphics g) super.paintComponent(g); Graphics2D g2d = (Graphics2D) g; g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); Insets insets = getInsets(); int wid = getWidth() - insets.left - insets.right; int hei = getHeight() - insets.t

10、op - insets.bottom; int r = (int) (Math.min(wid, hei) / 2 / (1+s); g2d.translate(insets.left + r * (1+s), insets.top + r * (1+s); g2d.scale(1, -1); for (int i = 0; i 60; i+) int angle = 90 - i * 6; double pos = calcPos(r, angle); paintMinuteDot(r, g2d, pos0, pos1, i % 5 = 0); paintHourPointer(r, g2d

11、); paintMinutePointer(r, g2d); paintSecondPointer(r, g2d); paintCenterPoint(g2d); g2d.scale(1, -1); g2d.translate(-insets.left - r * (1+s), -insets.top - r * (1+s); private void paintCenterPoint(Graphics2D g2d) g2d.setColor(Color.BLUE); Rectangle2D rect = new Rectangle2D.Double(-2, -2, 4, 4); g2d.fi

12、ll(rect); private void paintMinutePointer(int r, Graphics2D g2d) int minute = currentTime.get(Calendar.MINUTE); int second = currentTime.get(Calendar.SECOND); double angle = 90 - (minute + second / 60.0) * 6; Shape pointerShape = createPointerShape(r * 0.8, r * 0.04, r * 0.08, angle); g2d.setColor(C

13、olor.LIGHT_GRAY); g2d.fill(pointerShape); g2d.setColor(Color.DARK_GRAY); g2d.draw(pointerShape); private void paintHourPointer(int r, Graphics2D g2d) int hour = currentTime.get(Calendar.HOUR); int minute = currentTime.get(Calendar.MINUTE); int second = currentTime.get(Calendar.SECOND); double angle

14、= 90 - (hour + minute / 60.0 + second / 3600.0) * 30; Shape pointerShape = createPointerShape(r * 0.6, r * 0.06, r * 0.1, angle); g2d.setColor(Color.LIGHT_GRAY); g2d.fill(pointerShape); g2d.setColor(Color.DARK_GRAY); g2d.draw(pointerShape); private Shape createPointerShape(double r1, double r2, doub

15、le r3, double angle) GeneralPath gp = new GeneralPath(); double pos = calcPos(r1, angle); double pos1 = calcPos(r2, angle + 90); gp.append(new Line2D.Double(pos0, pos1, pos10, pos11), true); double pos2 = calcPos(r3, angle + 180); gp.lineTo(float)pos20, (float)pos21); double pos3 = calcPos(r2, angle

16、 + 270); gp.lineTo(float)pos30, (float)pos31); gp.closePath(); return gp; private void paintSecondPointer(int r, Graphics2D g2d) g2d.setColor(Color.BLACK); int second = currentTime.get(Calendar.SECOND); int angle = 90 - second * 6; double pos = calcPos(r * 0.9, angle); double pos1 = calcPos(r * 0.2,

17、 angle + 180); Line2D line = new Line2D.Double(pos10, pos11, pos0, pos1); g2d.draw(line); private void paintMinuteDot(int r, Graphics2D g2d, double x, double y, boolean flag) g2d.setColor(flag ? Color.RED : Color.BLACK); if (flag) /Rectangle2D rect = new Rectangle2D.Double( Ellipse2D rect = new Elli

18、pse2D.Double( x - r * s, y - r * s, r * s * 2, r * s * 2); g2d.fill(rect); else /Rectangle2D rect = new Rectangle2D.Double( Ellipse2D rect = new Ellipse2D.Double( x - r * 0.02, y - r * 0.02, r * 0.04, r * 0.04); g2d.fill(rect); private double calcPos(double r, double angle) double radian = Math.toRa

19、dians(angle); double x = r * Math.cos(radian); double y = r * Math.sin(radian); return new double x, y; public static void main(String args) try UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName(); catch (Exception e) e.printStackTrace(); final Clock clock = new Clock(50); clock.setBo

20、rder(BorderFactory.createEmptyBorder(10, 10, 10, 10); JFrame f = new JFrame( 软件081班 071404011 庆贺 ); /f.setBounds(380,200,500,600); f.getContentPane().add(clock, BorderLayout.CENTER); f.pack(); f.setLocationRelativeTo(null); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setVisible(true); new Th

21、read() public void run() while (true) try Thread.sleep(1000); catch (InterruptedException ex) ex.printStackTrace(); clock.setCurrentTime(System.currentTimeMillis(); clock.repaint(); .start(); int y1 = (int)(r - 10) * Math.cos(rad * s);g.drawLine(x + r, y + r, x + r + x1, y + r - y1);/分针g.setColor(Co

22、lor.BLUE);x1 = (int)(r - r / 2.5) * Math.sin(rad * m);y1 = (int)(r - r / 2.5) * Math.cos(rad * m);g.drawLine(x + r, y + r, x + r + x1, y + r - y1);/时针g.setColor(Color.CYAN);x1 = (int)(r - r / 1.5) * Math.sin(rad * h);y1 = (int)(r - r / 1.5) * Math.cos(rad * h);g.drawLine(x + r, y + r, x + r + x1, y

23、+ r - y1);/数字g.setColor(Color.YELLOW);int d = 29;for (int i = 1; i = 12; i+) x1 = (int)(r - 10) * Math.sin(rad * d);y1 = (int)(r - 10) * Math.cos(rad * d);g.drawString(i + , x + r + x1 - 4, x + r - y1 + 5);d+=30;/小点d = 0;for (int i = 0; i = 360) s = 0;m+=6;if (m = 72 | m = 144 | m = 216 | m = 288) h

24、+=6;if (m = 360) m = 0;h+=6;if (h =360) h = 0;this.repaint();int x, y, r;int h, m, s;/小时，分钟，秒double rad = Math.PI / 180;public ClockPaint(int x, int y, int r) this.x = x;this.y = y;this.r = r;Calendar now = new GregorianCalendar();s = now.get(Calendar.SECOND) * 6;/获得秒转换成度数m = now.get(Calendar.MINUTE

25、) * 6;/获得分钟h = (now.get(Calendar.HOUR_OF_DAY) - 12) * 30 + now.get(Calendar.MINUTE) / 12 * 6;/获得小时Thread t = new Thread(this);t.start();public void paint(Graphics g) /清屏super.paint(g);g.setColor(Color.BLACK);g.fillRect(0, 0, r * 3, r * 3);/画圆g.setColor(Color.WHITE);g.drawOval(x, y, r * 2, r * 2);/秒针

26、g.setColor(Color.RED);int x1 = (int)(r - 10) * Math.sin(rad * s);/定义MyTimer类 class MyTimer1 extends JFrame static int count=0; /判断是否重定义了时间 /构造函数 public MyTimer1() /定义窗口大小 setSize(320, 200); /定义窗口标题 setTitle(测试自定义时钟类！); Container c = getContentPane(); / new ClockCanvas(时间, GMT+8) c.add(new ClockCanva

27、s(时间, GMT+8); /定义接口 interface TimerListener1 void timeElapsed(Timer1 t); class Timer1 extends Thread /类Timer1 private TimerListener1 target; private int interval; public Timer1(int i, TimerListener1 t) target = t; interval = i; setDaemon(true); public void run() try while (!interrupted() sleep(inter

28、val); target.timeElapsed(this); catch(InterruptedException e) class ClockCanvas extends JPanel /clockcanvas implements TimerListener1 static int seconds = 0; private String city; private GregorianCalendar calendar; /构造函数 public ClockCanvas(String c, String tz) city = c; calendar = new GregorianCalen

29、dar(TimeZone.getTimeZone(tz); Timer1 t = new Timer1(1000, this); t.start(); setSize(180, 180); /绘制钟面 public void paintComponent(Graphics g) super.paintComponent(g); g.drawOval(100, 5, 120, 120); g.drawOval(101, 6, 118, 118); /分离时间 double hourAngle = 2 * Math.PI * (seconds - 3 * 60 * 60) / (12 * 60 *

30、 60); double minuteAngle = 2 * Math.PI * (seconds - 15 * 60) / (60 * 60); double secondAngle = 2 * Math.PI * (seconds - 15) / 60; public void timeElapsed(Timer1 t) calendar.setTime(new Date(); if(MyTimer1.count=1) int a=1; seconds=MyTHour*60*60+MyTMinute*60+MyTSecond; seconds

31、+=a;/a为秒自加 repaint(); else seconds = calendar.get(Calendar.HOUR) * 60 * 60 + calendar.get(Calendar.MINUTE) * 60 + calendar.get(Calendar.SECOND); repaint(); /定义时钟类 class MyTimer implements TimerListener /定义时钟类的属性 static int intHour,intMinute,intSecond; /构造函数 public MyTimer() setCurrentTimeAsSystemTim

32、e(); Timer t = new Timer(1000, this); /实例Timer类，里面有run方法 t.start(); /显示当前时间 public void displayCurrentTime() JOptionPane.showMessageDialog(null,intHour+:+intMinute+:+intSecond); /设定当前时间 public void setCurrentTime() /从对话框输入时，分秒 String strTemp=JOptionPane.showInputDialog(null,请输入当前小时（24小时制)：); int iHo

33、ur=Integer.parseInt(strTemp); strTemp=JOptionPane.showInputDialog(null,请输入当前分：); int iMinute=Integer.parseInt(strTemp); strTemp=JOptionPane.showInputDialog(null,请输入当前秒：); int iSecond=Integer.parseInt(strTemp); /设定当前时间为对话框输入的时间 if(iHour=0&iHour24) intHour=iHour; transform(angle);g.setcolor(color);/设定

34、当前时间为系统时间，构造函数调用 public void setCurrentTimeAsSystemTime() /定义Date类的一个对象，用来获取系统时间 Date timeCurrent=new Date(); catch(InterruptedException e) 2.4测试分析2.4.1程序运行情况当程序正常运行的时候，它能清晰的显示时钟界面。默认为与系统时间同步，如果出现错误，就会进行归零。运行界面如图2.1：图2.1运行界面2.4.2程序异常处理当线程在活动之前或活动期间处于正在等待、休眠或占用状态且该线程被中断时，抛出该异常。有时候，一种方法可能希望测试当前线程是否已被中断，如果已被中断，则立即抛出此异常。利用trycatch来捕获出现的异