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程序设计课内实豔报告实验名称专业名称：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 口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jdkdemo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, 输岀文本框显示：壹佰捌拾玖元伍角陆分。3. 设计一个applet,完成数字时钟功能。三.方案设计使用box类布局小应用程序第一题 public

2、 void init() string blinkfrequency = getparameter('1 speed"); delay = (blinkfrequency = null) ? 400:(1000 / integer.parselnt(blinkfrequency); labelstring = getparameter(n 1 b 1");if (labelstring = null) labelstring = ” blink”；font font = new java.awt.font(nseriffont.plain, 24); setfont

3、(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() thread me = thread.currentthread();while (timer = me) try thread.

4、sleep(loo); catch (interruptedexception e) repaintq;1. 正常测试数据（3组）及运行结果；水圄小应用程序查看器:blink忑=|回iw小应用程序blink已启动小应用程序。小写189.56犬写壹佰捌拾玖元伍角陆分change已启动小应用程序。圄 小应用理序奁看器:cloclcds i回iqmt 小应用程序星期三五月28 13:24:22 2014已启动小应用程序。五.总结1. 实验过程中遇到的问题及解决办法；在使用box吋不熟悉它的方法，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

5、录：源代码（电子版）import java.awt.color;import java.awt.dimension;import java.awt.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 serialversion

6、uid = -775844794477507646l; private timer timer;private string labelstring;private int delay;public void init() string blinkfrequency = getparameter(11 speedn;delay = (blinkfrequency = null) ? 400:(1000/ integerparselnt(blinkfequency);labelstring = getparameter(ulbr,);if (labelstring = null) labelst

7、ring = “blink”；font font = new java.awt.font(nseriffont.plain, 24); setfont(font);public void start() timer = new timer();time匚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 re

8、d = (int) (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 = fmtringwidthc1 ");for (stringtokenizer t = new stringtokenizer(labelstring);t.hasmoretokens();)

9、string word = t.nexttoken();int w = fm.stringwidth(word) + space;讦(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 void stop() t

10、ime 匚 cancel。；public string getappletinfo() return "title: blinkernm+ ''author: arthur van hoffnn+ "displays multicolored blinking text."public string getparameterinfo() string pinfo = "speed", "string", "the blink frequency"), ”string”，”the text

11、to blink.“ , ;return pinfo;2.import java.awt.container;import j ava.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 javax.swing. joptionpane;import javax.swing. jtextfield;public

12、class changermb extends j applet implements actionlistener private jtextfield jtfd;private jtextfield jtfu;private jbutton jbtn = new jbutton(hchangeh);public void init()container con = this.getcontentpane();jtfd = new jtextfield();jtfu = new jtextfield();jbtn = new jbutton(nchangeh);box bl = box.cr

13、eatehorizontalbox();b 1 .add(box.createhorizontalstrut( 10);bl.add(new jlabel("小写")；bl.add(jtfd);b 1 .add(box.createhorizontalstrut( 10);box b2 = box.createhorizontalbox();b2.add(box.createhorizontalstrut(10);b2.add(new jlabel("大写")；b2.add(jtfu); b2.add(box.createhorizontalstrut(

14、l 0);box b3 = box.createhorizontalbox();b3.add(box.createhorizontalstrut(10);b3.add(jbtn);box b = box.createverticalbox();b.add(box.createverticalstrut(30);b.add(bl);b.add(box.createverticalstrut(30);b.add(b2);b.add(boxxreateverticalstrut(30);b.add(b3); con.add(b);jbtn.addactionlistener(this);public

15、 void actionperformed(actionevent e) try string str = jtld.gettext();double money= double.parsedouble(str); jtfu.settext(tormb(money); catch (exception ex) joptionpane.showmessagedialog(null ex);(©=,zw)=vqoeidan3s0 h 二 nsai (w=x$g».)=vu。皂dm 二 ns 七 h 二 nsu (».x腿脚.)=vumdan3sal n 二 nsu (

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18、1kw=)=vq0£danwsp nw ww)=vuoeidan3sp n 氏帥.)=veidm=nsai n w 脚帥=)=<裟且 danssal n - 2y)=vuozdan-nsal h - ww=)=vqondarunsai h ow)=vq0eidan3sp h 一 «w.)=vuoeidan3sai h - lk)=vuoqdan3sa! n w 口鮒.-)=vgw_dan_nsaih -nsai nsoj nsp nscdj nsuj nsai nsoj nsp nsuj nsuj nsupublic class clock extends apple

19、t 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 currentdate;private color handcolor;private color numbercolor;private int xcenter = 80, yce

20、nter = 55;public void inii() lastxs = lastys = lastxm = lastym = lastxh = lastyh = 0;formatter = new simpledateformat(heee mmm dd hh:mm:ss yyyyh, locale.getdefault();currentdate = new date();lastdate = formatter.format(currentdate);clockfacefont = new font("serif', font.plain, 14); handcolo

21、r = color, blue;numbercolor = color.darkgray;16)； catch (nullpointerexception e) catch (numberformatexception e) try handcolor = new color(intege匚parseirh(ge(parameter(”fgcoloitj,16);)catch (nullpointerexception e) catch (numberformatexception e) try numbercolor = new color(integer.parseint(getparam

22、eter(hfgcolor2n),16); catch (nullpointerexception e) catch (numberformatexception e) resize(200, 200);public void update(graphics g) int xh, yh, xm, ym, xs, ys;int s = 0, m = 10, h 二 10;string today;currentdate = new date();formatte 匚 applypattem( hsh);try s = intege r.parseint(formamer.fonnat(curre

23、ntdate);)catch (numberformatexception n) s = 0;formatter.applypattern(hm");try m = intege r*.parscini(foirnahe 匚 foirnat(currcn(date); catch (numberformatexception n) m = 10;)formatte i*.applypattem(”h”)；try h = intege 匚 parseint(formatter.f(mmat(currentdate); catch (numberformatexception n) h

24、= 10;xs = (int) (math.cos(s * math.pi / 30 math.pi / 2) * 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(

25、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 yyyym); today = formatte 匚 foutiamcuitentdate);g.setfont(clockfacefont);g.setcolor(getbackground();if (xs != lastxs | ys != lastys) g.drawline(xcenter, ycenter, lastxs, lastys); g.drawstring(