JAVA線程程序設(shè)計實驗報告

1、線程程序設(shè)計一、課題內(nèi)容和要求內(nèi)容：設(shè)計和編寫一個編寫一個指針式時鐘程序，應(yīng)用線程實現(xiàn)時鐘的走 動。要求：本實驗旨在通過實驗，培養(yǎng)學(xué)生將JAVA線程的相關(guān)知識點(包括線程調(diào)度，線程同步等)有機(jī)結(jié)合并加以綜合應(yīng)用，在實驗中設(shè)計多線程程序的能 力。二、設(shè)計思路分析class Clock: 一個指針式時鐘的主類class Layout: 添加窗口和時鐘組件class ClockPai nt: 定義時鐘組件三、概要設(shè)計public class Clock exte nds JFrame public static void main( Stri ng s);class Layout exte nds

2、JFrame public Layout();class ClockPa int exte nds JPa nel impleme nts Runn able int x, y, r;int h, m, s;double rad = Math.PI / 180;public ClockPa in t(i nt x, int y, int r);public void pain "Graphics g);public void run();時鐘的繪制：運行時鐘:（）IIhrcad.sk-cpdOOO）中斷一秒石車新運行s += 6秒"針走b度5 = O,ID +»

3、6h + 6m = 0*h +工 6（結(jié)束）*四、詳細(xì)設(shè)計import java.awt.*;import javax.swi ng.*;import java.util.*;public class Clock exte nds JFrame public static void main(String s) new Layout。;class Layout extends JFrame / 添加窗口和時鐘組件 public Layout() ClockPai nt cp = new ClockPai nt(20, 20, 70); add(cp);setBounds(260, 120, 2

4、00, 200);setResizable(false);this.setTitle(" 指針式時鐘 ");this.setVisible(true); class ClockPaint extends JPanel implements Runnable / 定義時鐘組件 int x, y, r;/ 時鐘的位置坐標(biāo)和半徑 int h, m, s;/ 小時，分鐘，秒 double rad = Math.PI / 180;/ 定義弧度public ClockPaint(int x, int y, int r) / 構(gòu)造函數(shù)this.x = x;this.y = y;this.

5、r = r;Calendar now = Calendar.getInstance();/ 初始化日歷對象s = now.get(Calendar.SECOND) * 6;/ 獲得初始秒轉(zhuǎn)換成度數(shù)m = now.get(Calendar.MINUTE) * 6;/ 獲得初始分鐘轉(zhuǎn)換成度數(shù)h = (now.get(Calendar.HOUR_OF_DAY) - 12) * 30 + now.get(Calendar.MINUTE) * 6 / 12;/ 獲得初始小時轉(zhuǎn)換成度數(shù)加分鐘 實現(xiàn)連貫Thread t = new Thread(this);/ 新建線程t.start();/ 啟動線程pub

6、lic void paint(Graphics g) / 繪制時鐘g.setColor(Color.BLACK);/ 畫背景g.fillRect(0, 0, r * 3, r * 3);g.setColor(Color.WHITE);/ 畫圓 g.drawOval(x, y, r * 2, r * 2);int d = 0;/ 每 6度畫一個小點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 *

7、d); g.drawString(".", x + r + x1 - 1, x + r - y1 + 1); d += 6;d = 30;/ 從 30 度開始每 30度畫一個數(shù)字和一線for (int 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) * M

8、ath.sin(rad * d);y1 = (int) (r - 6) * Math.cos(rad * d);x2 = (int) (r - 2) * Math.sin(rad * d);y2 = (int) (r - 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);/ 按時間畫秒針x1 = (int) (0.8 * r) * Math.sin(rad * s);y1 = (int) (0.8 * r) * Math

9、.cos(rad * s); g.drawLine(x + r, y + r, x + r + x1, y + r - y1);g.setColor(Color.BLUE);/ 按時間畫分針 x1 = (int) (0.6 * 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);/ 按時間畫時針 x1 = (int) (0.4 * r) * Math.sin(rad *

10、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.GREEN);/ 顯示時間Calendar now1 = Calendar.getInstance(); g.drawString(now1.get(Calendar.HOUR_OF_DAY) + " ： " + now1.get(Calendar.MINUTE) + " ： " + now1.get(Calendar.SECOND),

11、 0, 10);public void run() / 運行時鐘while (true) try Thread.sleep(1000);/ 中斷一秒后重新運行 catch (Exception ex) System.out.println(ex);s += 6;/ 秒針走 6 度if (s >= 360) / 秒針走完一分鐘后重置s = 0;m += 6;if (m = 72 | m = 144 | m = 216 | m = 288) /分針走完 5分鐘后重置h += 6;if (m >= 360) /分針走完一小時后重置m = 0;h += 6;if (h >= 360) /時針走完12小時后重置h = 0;this.repaint();重新繪制時