西安邮电大学java小应用程序APPLET报告

1、 西 安 邮 电 大 学 （计算机学院）Java程序设计课内实验报告实验名称： APPLET 专业名称： 软件工程班 级：1201 学生姓名： 学号（8位）： 指导教师： 实验日期： 2014年5月26日一. 实验目的及实验环境理解 Applet 生命周期模型及运行原理，掌握 Applet 设计方法，能结合以前知识，综合应用，实现实用价值的小应用程序。二. 实验内容1. 运行 JDK Demo 中的示例程序，加强对 Applet 的理解。2. 设计一个 Applet，完成将小写数字货币转换成大写形式。如输入 189.56，输出文本框显示：壹佰捌拾玖元伍角陆分。3. 设计一个 Applet，完成

2、数字时钟功能。三方案设计使用Box类布局小应用程序第一题public void init() String blinkFrequency = getParameter("speed"); delay = (blinkFrequency = null) ? 400 : (1000 / Integer.parseInt(blinkFrequency); labelString = getParameter("lbl"); if (labelString = null) labelString = "Blink" Font font = n

3、ew java.awt.Font("Serif", Font.PLAIN, 24); setFont(font); 第二题public void actionPerformed(ActionEvent e) try String str = jtfD.getText(); double money= Double.parseDouble(str);jtfU.setText(toRMB(money); catch (Exception ex) JOptionPane.showMessageDialog(null, ex); 第三题public void run() Threa

4、d me = Thread.currentThread(); while (timer = me) try Thread.sleep(100); catch (InterruptedException e) repaint(); 四测试数据及运行结果1正常测试数据（3组）及运行结果；五总结1实验过程中遇到的问题及解决办法；在使用Box时不熟悉它的方法，不知道该如何使用2对设计及调试过程的心得体会。对APPLET的编程不熟悉，该多看看书，查查API六附录：源代码（电子版）1.import java.awt.Color;import java.awt.Dimension;import java.a

5、wt.Font;import java.awt.FontMetrics;import java.awt.Graphics;import java.util.StringTokenizer;import java.util.Timer;import java.util.TimerTask;public class Blink extends java.applet.Applet private static final long serialVersionUID = -775844794477507646L; private Timer timer; private String labelSt

6、ring; private int delay; public void init() String blinkFrequency = getParameter("speed"); delay = (blinkFrequency = null) ? 400 : (1000 / Integer.parseInt(blinkFrequency); labelString = getParameter("lbl"); if (labelString = null) labelString = "Blink" Font font = new

7、java.awt.Font("Serif", Font.PLAIN, 24); setFont(font); public void start() timer = new Timer(); timer.schedule(new TimerTask() public void run() repaint(); , delay, delay); public void paint(Graphics g) int fontSize = g.getFont().getSize(); int x = 0, y = fontSize, space; int red = (int) (

8、50 * Math.random(); int green = (int) (50 * Math.random(); int blue = (int) (256 * Math.random(); Dimension d = getSize(); g.setColor(Color.black); FontMetrics fm = g.getFontMetrics(); space = fm.stringWidth(" "); for (StringTokenizer t = new StringTokenizer(labelString); t.hasMoreTokens()

9、;) String word = t.nextToken(); int w = fm.stringWidth(word) + space; if (x + w > d.width) x = 0; y += fontSize; if (Math.random() < 0.5) g.setColor(new java.awt.Color(red + y * 30) % 256, (green + x / 3) % 256, blue); else g.setColor(getBackground(); g.drawString(word, x, y); x += w; public v

10、oid stop() timer.cancel(); public String getAppletInfo() return "Title: Blinkern" + "Author: Arthur van Hoffn" + "Displays multicolored blinking text." public String getParameterInfo() String pinfo = "speed", "string", "The blink frequency"

11、 , "lbl", "string", "The text to blink." , ; return pinfo; 2.import java.awt.Container;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.Box;import javax.swing.JApplet;import javax.swing.JButton;import javax.swing.JLabel;import ja

12、vax.swing.JOptionPane;import javax.swing.JTextField;public class ChangeRMB extends JApplet implements ActionListenerprivate JTextField jtfD;private JTextField jtfU;private JButton jbtn = new JButton("Change");public void init()Container con = this.getContentPane();jtfD = new JTextField();

13、jtfU = new JTextField(); jbtn = new JButton("Change"); Box b1 = Box.createHorizontalBox(); b1.add(Box.createHorizontalStrut(10);b1.add(new JLabel("小写"); b1.add(jtfD);b1.add(Box.createHorizontalStrut(10); Box b2 = Box.createHorizontalBox(); b2.add(Box.createHorizontalStrut(10); b2

14、.add(new JLabel("大写");b2.add(jtfU); b2.add(Box.createHorizontalStrut(10); Box b3 = Box.createHorizontalBox();b3.add(Box.createHorizontalStrut(10); b3.add(jbtn); Box b = Box.createVerticalBox();b.add(Box.createVerticalStrut(30); b.add(b1); b.add(Box.createVerticalStrut(30); b.add(b2); b.add

15、(Box.createVerticalStrut(30); b.add(b3); con.add(b); jbtn.addActionListener(this); public void actionPerformed(ActionEvent e) try String str = jtfD.getText(); double money= Double.parseDouble(str);jtfU.setText(toRMB(money); catch (Exception ex) JOptionPane.showMessageDialog(null, ex); public static

16、String toRMB(double money) char s1 = '零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖' char s4 = '分', '角', '元', '拾', '佰', '仟', '万', '拾', '佰', '仟&

17、#39;, '亿', '拾', '佰', '仟', '万' String str = String.valueOf(Math.round(money * 100 + 0.00001); String result = "" for (int i = 0; i <str.length(); i+) int n = str.charAt(str.length() - 1 - i) - '0'result = s1n + "" + s4i + result;

18、result = result.replaceAll("零仟", "零"); result = result.replaceAll("零佰", "零"); result = result.replaceAll("零拾", "零"); result = result.replaceAll("零亿", "亿"); result = result.replaceAll("零万", "万"); resul

19、t = result.replaceAll("零元", "元"); result = result.replaceAll("零角", "零"); result = result.replaceAll("零分", "零"); result = result.replaceAll("零零", "零"); result = result.replaceAll("零亿", "亿"); result = r

20、esult.replaceAll("零零", "零"); result = result.replaceAll("零万", "万"); result = result.replaceAll("零零", "零"); result= result.replaceAll("零元", "元"); result = result.replaceAll("亿万","亿"); result = result.r

21、eplaceAll("零$", ""); result = result.replaceAll("元$", "元整"); result = result.replaceAll("角$", "角整"); return result; 3.import java.applet.Applet;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.text.SimpleDateF

22、ormat;import java.util.Date;import java.util.Locale;public class Clock extends Applet implements Runnable private volatile Thread timer; private int lastxs, lastys, lastxm, lastym, lastxh, lastyh; private SimpleDateFormat formatter; private String lastdate; private Font clockFaceFont; private Date c

23、urrentDate; private Color handColor; private Color numberColor; private int xcenter = 80, ycenter = 55; public void init() lastxs = lastys = lastxm = lastym = lastxh = lastyh = 0; formatter = new SimpleDateFormat("EEE MMM dd hh:mm:ss yyyy", Locale.getDefault(); currentDate = new Date(); la

24、stdate = formatter.format(currentDate); clockFaceFont = new Font("Serif", Font.PLAIN, 14); handColor = Color.blue; numberColor = Color.darkGray; try setBackground(new Color(Integer.parseInt(getParameter("bgcolor"), 16); catch (NullPointerException e) catch (NumberFormatException

25、e) try handColor = new Color(Integer.parseInt(getParameter("fgcolor1"), 16); catch (NullPointerException e) catch (NumberFormatException e) try numberColor = new Color(Integer.parseInt(getParameter("fgcolor2"), 16); catch (NullPointerException e) catch (NumberFormatException e) r

26、esize(200, 200); public void update(Graphics g) int xh, yh, xm, ym, xs, ys; int s = 0, m = 10, h = 10; String today; currentDate = new Date(); formatter.applyPattern("s"); try s = Integer.parseInt(formatter.format(currentDate); catch (NumberFormatException n) s = 0; formatter.applyPattern(

27、"m"); try m = Integer.parseInt(formatter.format(currentDate); catch (NumberFormatException n) m = 10; formatter.applyPattern("h"); try h = Integer.parseInt(formatter.format(currentDate); catch (NumberFormatException n) h = 10; xs = (int) (Math.cos(s * Math.PI / 30 - Math.PI / 2)

28、* 45 + xcenter); ys = (int) (Math.sin(s * Math.PI / 30 - Math.PI / 2) * 45 + ycenter); xm = (int) (Math.cos(m * Math.PI / 30 - Math.PI / 2) * 40 + xcenter); ym = (int) (Math.sin(m * Math.PI / 30 - Math.PI / 2) * 40 + ycenter); xh = (int) (Math.cos(h * 30 + m / 2) * Math.PI / 180 - Math.PI / 2) * 30 + xcenter); yh = (int) (Math.sin(h * 30 + m / 2) * Math.PI / 180 - Math.PI / 2) * 30 + ycenter); formatter.applyPattern("EEE MMM dd HH:mm:ss yyyy"); today = formatter.format(currentDate); g.setFont(clockFaceFont); g.setColor(getBackground();