Java小时钟课程设计

1、利用JAVA实现一个时钟的小程序1 设计方法 在设计简单小时钟时，需要编写1个Java源文件：Clock.java2 程序功能图及程序相关说明2.1 主功能框启动小时钟界面秒针走时分针走时时针走时关闭小时钟图1 程序基本框图2.2 程序分析程序中引入的包 package Clock import java.awt.Clock /颜色类 import java.awt.Graphics /图形类 import java.awt.event.WindowAdapter /窗口事件适配器 import java.awt.event.WindowEvent /窗口事件类 import java.uti

2、l.Calendar /日历类import java.util.GregorianCalendar /使用GregorianCalendar对象的get方法 （参数）获取时、分、秒用户自定义类说明 * * 类名：Clock * * 作用：定义小时钟 * * 继承的父类：JFrame * *public class clock extends JFrame定义的对象：ClockPaint size /窗口大小 Resizable /调整窗口大小 Location / 初始位置 Title /窗口标题 Visible /窗口可视化 WindowListener，WindowClosing /创建窗

3、口，并实现关闭功能 定义子类：ClockPaint继承的父类名：JPanel继承的接口名：Runnableclass ClockPaint extends JPanel implements Runnableint h, m, s / 小时，分钟，秒主要成员方法：public ClockPaintthis.x = xthis.y = ythis.r = rs = now.get(Calendar.SECOND) * 6 / 获得秒转换成度数m = now.get(Calendar.MINUTE) * 6 / 获得分钟h = (now.get(Calendar.HOUR_OF_DAY) - 12

4、) * 30+ now.get(Calendar.MINUTE) / 12 * 6 / 获得小时主要成员方法：public void paint(Graphics g) / 清屏super.paint(g)g.setColor(Color.BLACK) /设置底图颜色为黑色g.fillRect(0, 0, r * 3, r * 3) / 画圆g.setColor(Color.WHITE) g.drawOval(x, y, r * 2, r * 2) / 秒针g.setColor(Color.RED) int x1 = (int) (r - 10) * Math.sin(rad * s)int

5、y1 = (int) (r - 10) * Math.cos(rad * s)g.drawLine(x + r, y + r, x + r + x1, y + r - y1) / 分针g.setColor(Color.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.

6、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 + r - y1) / 数字g.setColor(Color.YELLOW)int d = 29for (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

7、- y1 + 5)d += 30 / 小点d = 0;for (int i = 0; i = 360) s = 0m += 6if (m = 72 | m = 144 | m = 216 | m = 288) h += 6if (m = 360) m = 0h += 6;if (h = 360) h = 0;this.repaint();3.设计结果与分析将5个Java源文件：Server.java、Objecting.java、LogIn.java、ClientUser.java、Client.java。分别编译这5个Java源文件，或运行“javac *.java”命令，编译全部的源文件，

8、然后运行连接服务器的主类，即运行Clock类。连接完毕后在运行注册的主函数类，即运行LogIn类。运行Clock.java,运行结果如下：4主要代码：import java.awt.Color;import java.awt.Graphics;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.util.Calendar;import java.util.GregorianCalendar;import javax.swing.JFrame;import javax.swing.JP

9、anel;public class Clock extends JFrame /无参数构造器 public Clock() ClockPaint cp = new ClockPaint(20, 20, 70); this.add(cp); this.setSize(200, 200); this.setResizable(false); this.setLocation(260, 120); this.setTitle(小时钟); this.setVisible(true); addWindowListener(new WindowAdapter() public void windowClo

10、sing(WindowEvent e) System.exit(0); ); public static void main(String s) new Clock(); /表盘类，继承于JPanel，并实现Runnable接口，用于多线程class ClockPaint extends JPanel implements Runnable int x, y, r; int h, m, s;/ 小时，分钟，秒 double rad = Math.PI / 180;/构造器，初始化 public ClockPaint(int x, int y, int r) this.x = x;/坐标x th

11、is.y = y;/坐标y this.r = r;/表盘的半径 Calendar now = new GregorianCalendar(); s = now.get(Calendar.SECOND) * 6;/ 获得秒转换成度数 m = now.get(Calendar.MINUTE) * 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);/创建一个线程 t.start();/表开始走动 /画

12、表盘 public void paint(Graphics g) / 清屏 super.paint(g); g.setColor(Color.BLACK);/用黑色 g.fillRect(0, 0, r * 3, r * 3);/填充一个黑色的矩形做为背景 / 画圆 g.setColor(Color.WHITE);/用白色 g.drawOval(x, y, r * 2, r * 2);/画出表盘的轮廓 / 用红色画秒针 g.setColor(Color.RED); int x1 = (int) (r - 10) * Math.sin(rad * s); int y1 = (int) (r -

13、10) * Math.cos(rad * s); g.drawLine(x + r, y + r, x + r + x1, y + r - y1); / 用蓝色画分针 g.setColor(Color.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); / 用青色画时针 g.setColor(Color.CYAN); x1 = (int) (r - r

14、 / 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 + r - y1); / 用黄色画表盘上的数字 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 +=