課程設(shè)計(jì)計(jì)算器的設(shè)計(jì)與實(shí)現(xiàn)

1、課程設(shè)計(jì)報告設(shè)計(jì)名稱： 面向?qū)ο笳n程設(shè)計(jì) 選題名稱：計(jì)算器的設(shè)計(jì)與實(shí)現(xiàn)姓 名：學(xué) 號：專業(yè)班級：系 （院）： 計(jì)算機(jī)工程學(xué)院設(shè)計(jì)時間：設(shè)計(jì)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1課程設(shè)計(jì)目的面向?qū)ο蟪绦蛟O(shè)計(jì)是一門實(shí)踐性很強(qiáng)的計(jì)算機(jī)專業(yè)基礎(chǔ)課程，課程設(shè)計(jì)是學(xué)習(xí)完該課程后進(jìn)行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(jì)的理論、方法和基礎(chǔ)知識的理解，掌握使用Java語言進(jìn)行面向?qū)ο笤O(shè)計(jì)的基本方法，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(jì)任務(wù)與要求：課程設(shè)計(jì)可選用NetBeans、Eclipse、JBuilder等作為開發(fā)平臺

2、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)行系統(tǒng)的分析設(shè)計(jì)，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(jì)報告中。通過這次設(shè)計(jì)，要求掌握以下內(nèi)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(jì)說明書1、需求分析（用例圖）圖1.用例圖 課題：計(jì)算器的設(shè)計(jì)與實(shí)現(xiàn) 功能分析：此計(jì)

3、算器有連續(xù)運(yùn)算的功能，然而在很多人使用計(jì)算器時容易忘掉之前是用8*2呢還是6*2，于是這個計(jì)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(jì)MultipleOperation類，用來實(shí)現(xiàn)連續(xù)運(yùn)算的類MultipleOperation trans: String+operation (expr: String)Listl類,用來記錄歷史的類listStr: StringEstr: Stringflag: String+toString ()3詳細(xì)設(shè)計(jì)MultipleOperationtrans: String+operation (expr: String)p

4、ublic class MultipleOperation String trans; public void operation(String expr) ScriptEngineManager manager=new ScriptEngineManager(); ScriptEngine engine =manager.getEngineByName("js"); try trans= String.valueOf( engine.eval(expr); catch(Exception e) trans="錯誤語法" System.out.print

5、ln(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

6、.awt.event.*;import javax.swing.*;import java.util.*;public class NewJFrame extends javax.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;/用來加入列表第一行的提示 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 =

7、new 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.

8、getActionCommand(); * if (number) * textfield.setText(digit); * number = false; * else * textfield.setText(textfield.getText() + digit); * * * * * ActionListener operatorListener = new OperatorListener(); * private void action() * number = true; * textfield.setText(""); * equalOp = "=

9、" * op.setTotal("0"); * * * class OperatorListener implements ActionListener * public void actionPerformed(ActionEvent e) * if (number) * action(); * textfield.setText("0"); * else * number = true; * String displayText = textfield.getText(); * if (equalOp.equals("="

10、;) * op.A(); * op.setTotal(displayText); * history.D="=" * * * else if (equalOp.equals("+") * op.add(displayText); * op.B(); * history.F="+" * else if (equalOp.equals("-") * op.subtract(displayText); * op.B(); * history.F="-" * else if (equalOp.equal

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

12、int trans=1; * 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); * * textfield.setText("" + op.getTotalString(); * equalOp = e.getActionCommand(); * * * */public class judge public

13、 void pan() if(ClearNumber=0) textfield.setText(""); /*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 a

14、dd(String n) * total += convertToNumber(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 = convertToNumb

15、er(n); * * * * public void A() * history.A=textfield.getText(); * * public void B() * history.B=textfield.getText(); * * * private double convertToNumber(String n) * return Double.parseDouble(n); * * */ /* * Creates new form NewJFrame */ public NewJFrame() initComponents(); history=new list(); textf

16、ield.setText(null); CalcuOperation=new MultipleOperation(); ju=new judge(); this.setLocationRelativeTo(null); this.setResizable(false); private void btnPointActionPerformed(java.awt.event.ActionEvent evt) textfield.setText(textfield.getText()+"."); private void btnClearActionPerformed(java

17、.awt.event.ActionEvent evt) textfield.setText(textfield.getText().substring(0, textfield.getText().length()-1); private void btnEqual1ActionPerformed(java.awt.event.ActionEvent evt) textfield.setText(""); private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearN

18、umber=1; textfield.setText(textfield.getText()+"1"); private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; textfield.setText(textfield.getText()+"2"); private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumbe

19、r=1; textfield.setText(textfield.getText()+"3"); private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; textfield.setText(textfield.getText()+"4"); private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1;

20、 textfield.setText(textfield.getText()+"5"); private void jButton6ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; textfield.setText(textfield.getText()+"6"); private void jButton7ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; tex

21、tfield.setText(textfield.getText()+"7"); private void jButton8ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; textfield.setText(textfield.getText()+"8"); private void jButton9ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; textfie

22、ld.setText(textfield.getText()+"9"); private void jButton10ActionPerformed(java.awt.event.ActionEvent evt) ju.pan(); ClearNumber=1; textfield.setText(textfield.getText()+"0"); private void btnAddActionPerformed(java.awt.event.ActionEvent evt) textfield.setText(textfield.getText()

23、+"+"); ClearNumber=1; private void btnSubtractActionPerformed(java.awt.event.ActionEvent evt) textfield.setText(textfield.getText()+"-"); ClearNumber=1; private void btnMultiplyActionPerformed(java.awt.event.ActionEvent evt) ClearNumber=1; textfield.setText(textfield.getText()+&q

24、uot;*"); private void btnDivideActionPerformed(java.awt.event.ActionEvent evt) textfield.setText(textfield.getText()+"/"); ClearNumber=1; private void btnEqualActionPerformed(java.awt.event.ActionEvent evt) / CalcuOperation; String strans="" history.Str=textfield.getText();

25、CalcuOperation.operation(textfield.getText(); textfield.setText(CalcuOperation.trans); history.Estr=CalcuOperation.trans; strans=history.Str+"="+history.Estr; if(I=0&&textfield.getText()!=null) data.addElement("歷史記錄如下："); I=1; if(CalcuOperation.trans="錯誤語法") Cle

26、arNumber=0; else data.addElement(strans); jlist.setListData(data); textfield.setText(CalcuOperation.trans); ClearNumber=0; private void btnBrackets1ActionPerformed(java.awt.event.ActionEvent evt) textfield.setText(textfield.getText()+"("); private void btnBrackets2ActionPerformed(java.awt.

27、event.ActionEvent evt) textfield.setText(textfield.getText()+")"); private void jlistValueChanged(javax.swing.event.ListSelectionEvent evt) history.flag=String.valueOf(jlist.getSelectedValue(); textfield.setText( history.flag.substring(history.flag.indexOf("=")+1,history.flag.len

28、gth(); ClearNumber=1; flag=1; private void jButton11ActionPerformed(java.awt.event.ActionEvent evt) if(ClearNumber=0|flag=1) String a=textfield.getText().substring(0, textfield.getText().indexOf("."); textfield.setText("轉(zhuǎn)換為二進(jìn)制為： "+String.valueOf(Integer.toBinaryString(Integer.par

29、seInt(a); else if(textfield.getText().indexOf(".")!=-1) String a=textfield.getText().substring(0, textfield.getText().indexOf("."); textfield.setText("轉(zhuǎn)換為二進(jìn)制為： "+String.valueOf(Integer.toBinaryString(Integer.parseInt(a); else textfield.setText("轉(zhuǎn)換為二進(jìn)制為："+Strin

30、g.valueOf(Integer.toBinaryString(Integer.parseInt(textfield.getText(); ClearNumber=0; private void jButton12ActionPerformed(java.awt.event.ActionEvent evt) if(ClearNumber=0) String a=textfield.getText().substring(0, textfield.getText().indexOf("."); textfield.setText("轉(zhuǎn)換為八進(jìn)制為： "+

31、String.valueOf(Integer.toOctalString(Integer.parseInt(a); else if(textfield.getText().indexOf(".")!=-1) String a =textfield.getText().substring(0, textfield.getText().indexOf("."); textfield.setText("轉(zhuǎn)換為八進(jìn)制為： "+String.valueOf(Integer.toOctalString(Integer.parseInt(a); e

32、lse textfield.setText("轉(zhuǎn)換為八進(jìn)制為： "+String.valueOf(Integer.toOctalString(Integer.parseInt(textfield.getText(); ClearNumber=0; private void jButton13ActionPerformed(java.awt.event.ActionEvent evt) if(ClearNumber=0) String a=textfield.getText().substring(0, textfield.getText().length()-2); textfield.setTe