java課程設(shè)計報告計算器的設(shè)計實(shí)現(xiàn)分析

1、- 淮 海 工 學(xué) 院 計算機(jī)工程學(xué)院課程設(shè)計報告設(shè)計名稱： 面向?qū)ο笳n程設(shè)計 選題名稱：計算器的設(shè)計與實(shí)現(xiàn)姓 名：學(xué) 號：專業(yè)班級：系 院： 計算機(jī)工程學(xué)院設(shè)計時間：設(shè)計地點(diǎn)： 軟件實(shí)驗(yàn)室、教室 成績：指導(dǎo)教師評語： 簽名： 年 月 日. z-1課程設(shè)計目的?面向?qū)ο蟪绦蛟O(shè)計?是一門實(shí)踐性很強(qiáng)的計算機(jī)專業(yè)根底課程，課程設(shè)計是學(xué)習(xí)完該課程后進(jìn)展的一次較全面的綜合練習(xí)。其目的在于通過實(shí)踐加深學(xué)生對面向?qū)ο蟪绦蛟O(shè)計的理論、方法和根底知識的理解，掌握使用Java語言進(jìn)展面向?qū)ο笤O(shè)計的根本方法，提高運(yùn)用面向?qū)ο笾R分析實(shí)際問題、解決實(shí)際問題的能力。2課程設(shè)計任務(wù)與要求：課程設(shè)計可選用NetBeans、

2、Eclipse、uilder等作為開發(fā)平臺以提高開發(fā)效率，盡可能熟練掌握其中一種集成開發(fā)環(huán)境。建議采用UML建模技術(shù)進(jìn)展系統(tǒng)的分析設(shè)計，在Visio中畫出系統(tǒng)用例圖和類圖，并將UML圖復(fù)制到設(shè)計報告中。通過這次設(shè)計，要求掌握以下容：1） 面向?qū)ο蠹夹g(shù)中的繼承與多態(tài)重載和覆蓋機(jī)制、各種修飾符的使用2） 類、包、接口的定義與使用3） 常用工具類與算法的實(shí)現(xiàn)數(shù)組、向量、字符串、鏈表4） Java常用標(biāo)準(zhǔn)GUI組件及其事件處理5） Java的異常處理機(jī)制6） Java的數(shù)據(jù)庫連接技術(shù)7） Java的多線程技術(shù)與動畫制作8） Java的網(wǎng)絡(luò)編程 3課程設(shè)計說明書1、需求分析用例圖圖1.用例圖 課題：計算

3、器的設(shè)計與實(shí)現(xiàn) 功能分析：此計算器有連續(xù)運(yùn)算的功能，然而在很多人使用計算器時容易忘掉之前是用8*2呢還是6*2，于是這個計算器多出歷史檢驗(yàn)的功能，可以將以前的式子顯示在下方，一邊檢驗(yàn)正確與否。 2、概要設(shè)計MultipleOperation類，用來實(shí)現(xiàn)連續(xù)運(yùn)算的類MultipleOperation trans: String+operation (e*pr: String)Listl類,用來記錄歷史的類listStr: StringEstr: Stringflag: String+toString ()3詳細(xì)設(shè)計MultipleOperationtrans: String+operation

4、(e*pr: String)public class MultipleOperation String trans; public void operation(String e*pr) ScriptEngineManager manager=new ScriptEngineManager(); ScriptEngine engine =manager.getEngineByName("js"); try trans= String.valueOf( engine.eval(e*pr); catch(E*ception e) trans="錯誤語法" S

5、ystem.out.println(e); listStr:StringEstr: Stringflag: String+toString ()public class list String Str; String Estr; String flag; public list() Str=" Estr=" flag=" Override public String toString () /return A+F+B+D+C; return Str+"="+Estr; 4編程實(shí)現(xiàn)package Calculator;import java.aw

6、t.event.*;import java*.swing.*;import java.util.*;public class NewJFrame e*tends java*.swing.JFrame int ClearNumber=1;/判定點(diǎn)擊“=后 點(diǎn)擊數(shù)字按鈕重置文本框 int I=0;/用來參加列表第一行的提示 int flag=0;/點(diǎn)擊列表后 提取結(jié)果的判定源 judge ju; private boolean number = true; private String equalOp = "=" / private CalculatorOp op = new

7、CalculatorOp(); MultipleOperation CalcuOperation; list history; Vector<String> data=new Vector<String>(); / ActionListener numberListener = new NumberListener(); /* class NumberListener implements ActionListener * public void actionPerformed(ActionEvent event) * String digit = event.getA

8、ctionmand(); * if (number) * te*tfield.setTe*t(digit); * number = false; * else * te*tfield.setTe*t(te*tfield.getTe*t() + digit); * * * * * ActionListener operatorListener = new OperatorListener(); * private void action() * number = true; * te*tfield.setTe*t("); * equalOp = "=" * op.s

9、etTotal("0"); * * * class OperatorListener implements ActionListener * public void actionPerformed(ActionEvent e) * if (number) * action(); * te*tfield.setTe*t("0"); * else * number = true; * String displayTe*t = te*tfield.getTe*t(); * if (equalOp.equals("=") * op.A();

10、* op.setTotal(displayTe*t); * history.D="=" * * * else if (equalOp.equals("+") * op.add(displayTe*t); * op.B(); * history.F="+" * else if (equalOp.equals("-") * op.subtract(displayTe*t); * op.B(); * history.F="-" * else if (equalOp.equals("×

11、;") * op.multiply(displayTe*t); * op.B(); * history.F="×" * else if (equalOp.equals("÷") * op.divide(displayTe*t); * op.B(); * history.F="÷" * else if (equalOp.equals("N") * op.B(); * history.F="" * int A; * int B; * int trans=1;

12、* String C; * A=Integer.parseInt(history.A); * B=Integer.parseInt(history.B); * op.B(); * for(int i=0;i<B;i+) * trans *=A; * * op.power(String.valueOf(trans); * * te*tfield.setTe*t(" + op.getTotalString(); * equalOp = e.getActionmand(); * * * */public class judge public void pan() if(ClearNu

13、mber=0) te*tfield.setTe*t("); /*public class CalculatorOp * * private double total; * public CalculatorOp() * total = 0; * * public String getTotalString() * return "+total; * * public void setTotal(String n) * total = convertToNumber(n); * * public void add(String n) * total += convertToN

14、umber(n); * * public void subtract(String n) * total -= convertToNumber(n); * * public void multiply(String n) * total *= convertToNumber(n); * * * public void divide(String n) * total /= convertToNumber(n); * * * public void power (String n) * total = convertToNumber(n); * * * * public void A() * h

15、istory.A=te*tfield.getTe*t(); * * public void B() * history.B=te*tfield.getTe*t(); * * * private double convertToNumber(String n) * return Double.parseDouble(n); * * */ /* * Creates new form NewJFrame */ public NewJFrame() initponents(); history=new list(); te*tfield.setTe*t(null); CalcuOperation=ne

16、w MultipleOperation(); ju=new judge(); this.setLocationRelativeTo(null); this.setResizable(false); private void btnPointActionPerformed(java.awt.event.ActionEvent evt) te*tfield.setTe*t(te*tfield.getTe*t()+"."); private void btnClearActionPerformed(java.awt.event.ActionEvent evt) te*tfield

17、.setTe*t(te*tfield.getTe*t().substring(0, te*tfield.getTe*t().length()-1); private void btnEqual1ActionPerformed(java.awt.event.ActionEvent evt) te*tfield.setTe*t("); private void utton1ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; te*tfield.setTe*t(te*tfield.getTe*t(

18、)+"1"); private void utton2ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; te*tfield.setTe*t(te*tfield.getTe*t()+"2"); private void utton3ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; te*tfield.setTe*t(te*tfield.getTe*t()+"

19、3"); private void utton4ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; te*tfield.setTe*t(te*tfield.getTe*t()+"4"); private void utton5ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; te*tfield.setTe*t(te*tfield.getTe*t()+"5")

20、; private void utton6ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; te*tfield.setTe*t(te*tfield.getTe*t()+"6"); private void utton7ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; te*tfield.setTe*t(te*tfield.getTe*t()+"7"); privat

21、e void utton8ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; te*tfield.setTe*t(te*tfield.getTe*t()+"8"); private void utton9ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; te*tfield.setTe*t(te*tfield.getTe*t()+"9"); private void u

22、tton10ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; te*tfield.setTe*t(te*tfield.getTe*t()+"0"); private void btnAddActionPerformed(java.awt.event.ActionEvent evt) te*tfield.setTe*t(te*tfield.getTe*t()+"+"); ClearNumber=1; private void btnSubtractActionP

23、erformed(java.awt.event.ActionEvent evt) te*tfield.setTe*t(te*tfield.getTe*t()+"-"); ClearNumber=1; private void btnMultiplyActionPerformed(java.awt.event.ActionEvent evt) ClearNumber=1; te*tfield.setTe*t(te*tfield.getTe*t()+"*"); private void btnDivideActionPerformed(java.awt.ev

24、ent.ActionEvent evt) te*tfield.setTe*t(te*tfield.getTe*t()+"/"); ClearNumber=1; private void btnEqualActionPerformed(java.awt.event.ActionEvent evt) / CalcuOperation; String strans=" history.Str=te*tfield.getTe*t(); CalcuOperation.operation(te*tfield.getTe*t(); te*tfield.setTe*t(Calcu

25、Operation.trans); history.Estr=CalcuOperation.trans; strans=history.Str+"="+history.Estr; if(I=0&&te*tfield.getTe*t()!=null) data.addElement("歷史記錄如下："); I=1; if(CalcuOperation.trans="錯誤語法") ClearNumber=0; else data.addElement(strans); jlist.setListData(data); te

26、*tfield.setTe*t(CalcuOperation.trans); ClearNumber=0; private void btnBrackets1ActionPerformed(java.awt.event.ActionEvent evt) te*tfield.setTe*t(te*tfield.getTe*t()+"("); private void btnBrackets2ActionPerformed(java.awt.event.ActionEvent evt) te*tfield.setTe*t(te*tfield.getTe*t()+")&

27、quot;); private void jlistValueChanged(java*.swing.event.ListSelectionEvent evt) history.flag=String.valueOf(jlist.getSelectedValue(); te*tfield.setTe*t( history.flag.substring(history.flag.inde*Of("=")+1,history.flag.length(); ClearNumber=1; flag=1; private void utton11ActionPerformed(jav

28、a.awt.event.ActionEvent evt) if(ClearNumber=0|flag=1) String a=te*tfield.getTe*t().substring(0, te*tfield.getTe*t().inde*Of("."); te*tfield.setTe*t("轉(zhuǎn)換為二進(jìn)制為： "+String.valueOf(Integer.toBinaryString(Integer.parseInt(a); else if(te*tfield.getTe*t().inde*Of(".")!=-1) Strin

29、g a=te*tfield.getTe*t().substring(0, te*tfield.getTe*t().inde*Of("."); te*tfield.setTe*t("轉(zhuǎn)換為二進(jìn)制為： "+String.valueOf(Integer.toBinaryString(Integer.parseInt(a); else te*tfield.setTe*t("轉(zhuǎn)換為二進(jìn)制為："+String.valueOf(Integer.toBinaryString(Integer.parseInt(te*tfield.getTe*t();

30、ClearNumber=0; private void utton12ActionPerformed(java.awt.event.ActionEvent evt) if(ClearNumber=0) String a=te*tfield.getTe*t().substring(0, te*tfield.getTe*t().inde*Of("."); te*tfield.setTe*t("轉(zhuǎn)換為八進(jìn)制為： "+String.valueOf(Integer.toOctalString(Integer.parseInt(a); else if(te*tfie

31、ld.getTe*t().inde*Of(".")!=-1) String a =te*tfield.getTe*t().substring(0, te*tfield.getTe*t().inde*Of("."); te*tfield.setTe*t("轉(zhuǎn)換為八進(jìn)制為： "+String.valueOf(Integer.toOctalString(Integer.parseInt(a); else te*tfield.setTe*t("轉(zhuǎn)換為八進(jìn)制為： "+String.valueOf(Integer.toOctalString(Integer.parseInt(te*tfield.getTe*t(); ClearNumber=0; private void utton13ActionPerformed(java.awt.event.ActionEvent evt) if(ClearNumber=0) String a=te*tfield.getTe*t().substring(0, te*tfield.getTe*t().length()-2); te*tfield.setTe*t(