JAVA线程程序设计(小时钟)实验报告(附完整代码)(共5页)

1、精选优质文档-倾情为你奉上线程程序设计一、 课题内容和要求内容：设计和编写一个编写一个指针式时钟程序，应用线程实现时钟的走动。要求：本实验旨在通过实验，培养学生将JAVA 线程的相关知识点（包括线程调度，线程同步等）有机结合并加以综合应用，在实验中设计多线程程序的能力。二、设计思路分析class Clock:一个指针式时钟的主类class Layout: 添加窗口和时钟组件class ClockPaint:定义时钟组件三、概要设计 public class Clock extends JFrame public static void main(String s) ;class Layout

2、extends JFrame public Layout();class ClockPaint extends JPanel implements Runnable int x, y, r; int h, m, s; double rad = Math.PI / 180; public ClockPaint(int x, int y, int r);public void paint(Graphics g);public void run();时钟的绘制:运行时钟:四、详细设计 import java.awt.*;import javax.swing.*;import java.util.*;

3、public class Clock extends JFrame public static void main(String s) new Layout();class Layout extends JFrame / 添加窗口和时钟组件public Layout() ClockPaint cp = new ClockPaint(20, 20, 70);add(cp);setBounds(260, 120, 200, 200);setResizable(false);this.setTitle("指针式时钟");this.setVisible(true);class Cl

4、ockPaint extends JPanel implements Runnable / 定义时钟组件int x, y, r;/ 时钟的位置坐标和半径int h, m, s;/ 小时，分钟，秒double rad = Math.PI / 180;/ 定义弧度public ClockPaint(int x, int y, int r) / 构造函数this.x = x;this.y = y;this.r = r;Calendar now = Calendar.getInstance();/ 初始化日历对象s = now.get(Calendar.SECOND) * 6;/ 获得初始秒转换成度数

5、m = now.get(Calendar.MINUTE) * 6;/ 获得初始分钟转换成度数h = (now.get(Calendar.HOUR_OF_DAY) - 12) * 30+ now.get(Calendar.MINUTE) * 6 / 12;/ 获得初始小时转换成度数加分钟实现连贯Thread t = new Thread(this);/ 新建线程t.start();/ 启动线程public void paint(Graphics g) / 绘制时钟g.setColor(Color.BLACK);/ 画背景g.fillRect(0, 0, r * 3, r * 3);g.setCo

6、lor(Color.WHITE);/ 画圆g.drawOval(x, y, r * 2, r * 2);int d = 0;/ 每6度画一个小点int x1, y1, x2, y2;for (int i = 0; i < 60; i+) x1 = (int) (r - 2) * Math.sin(rad * d);y1 = (int) (r - 2) * Math.cos(rad * d);g.drawString(".", x + r + x1 - 1, x + r - y1 + 1);d += 6;d = 30;/ 从30度开始每30度画一个数字和一线for (i

7、nt i = 1; i <= 12; i+) x1 = (int) (r - 14) * Math.sin(rad * d);y1 = (int) (r - 14) * Math.cos(rad * d);g.drawString(i + "", x + r + x1 - 4, x + r - y1 + 5);x1 = (int) (r - 6) * Math.sin(rad * d);y1 = (int) (r - 6) * Math.cos(rad * d);x2 = (int) (r - 2) * Math.sin(rad * d);y2 = (int) (r

8、- 2) * Math.cos(rad * d);g.drawLine(x + r + x2, y + r - y2, x + r + x1, y + r - y1);d += 30;g.setColor(Color.RED);/ 按时间画秒针x1 = (int) (0.8 * r) * Math.sin(rad * s);y1 = (int) (0.8 * r) * Math.cos(rad * s);g.drawLine(x + r, y + r, x + r + x1, y + r - y1);g.setColor(Color.BLUE);/ 按时间画分针x1 = (int) (0.6

9、* r) * Math.sin(rad * m);y1 = (int) (0.6 * r) * Math.cos(rad * m);g.drawLine(x + r, y + r, x + r + x1, y + r - y1);g.setColor(Color.YELLOW);/ 按时间画时针x1 = (int) (0.4 * r) * Math.sin(rad * h);y1 = (int) (0.4 * r) * Math.cos(rad * h);g.drawLine(x + r, y + r, x + r + x1, y + r - y1);g.setColor(Color.GREE

10、N);/ 显示时间Calendar now1 = Calendar.getInstance();g.drawString(now1.get(Calendar.HOUR_OF_DAY) + "："+ now1.get(Calendar.MINUTE) + "："+ now1.get(Calendar.SECOND), 0, 10);public void run() / 运行时钟while (true) try Thread.sleep(1000);/ 中断一秒后重新运行 catch (Exception ex) System.out.println(ex);s += 6;/ 秒针走6度if (s >= 360) / 秒针走完一分钟后重置s = 0;m += 6;if (m = 72 | m = 144 | m = 216 | m = 288) / 分针走完5分钟后重置h += 6;if (m >= 360) / 分针走完一小时后重置m = 0;h += 6;if (h >= 360) / 时针走完12小时后重置h = 0;this.repaint();/ 重新绘制时钟五、测试数据及其结果