JAVA面向对象程序设计公选课课程报告.docx
JAVA面向对象程序设计课程报告 学 院_专 业_年级班别_学 号_学生姓名_ 2016年 4月 30 日评分要点评分内容得分格式（10分）字体、字号正确，间距正确；文本清晰、美观。源程序（80分）源程序无语法、逻辑错误，可读性强，有一定的工作量。运行结果（10分）有运行结果截图，运行界面截图大小合适。0-59不及格60-69及格70-79中等80-89良好90-100优秀总分JAVA面向对象程序设计课程报告评分标准要求：1、题目（四号、黑体，居中）2、完整源代码（中文：小四，宋体；英文：小四，Times New Roman，单倍行距）。3、运行界面截图。4、单面打印，课程报告正文不少于3页，在报告左侧用两颗钉书针装订。简单计算器的实现/多功能计算机器/支持+ - *,整数间的整除,小数除/支持百分比%运算及非负数的平方根sqrt运算/支持存储器运算,包括:清空MC,显示MR,存入MS,累计M+/支持复制粘贴import java.awt.*;import java.lang.*;import javax.swing.*;import javax.swing.event.*;import java.awt.event.*;import java.text.DecimalFormat;public class Calculator implements ActionListener /导入动作监听接口 /设计面板中的单位 JFrame frame; JTextField textAnswer; JPanel panel, panel1, panel2, panel3; JMenuBar mainMenu; JTextField textMemory; JLabel labelMemSpace; /labelMemSpace单纯做摆设，控制面板的形状 JButton buttonBk, buttonCe, buttonC; JButton button; JButton buttonMC, buttonMR, buttonMS, buttonMAdd; JButton buttonDot, buttonAddAndSub, buttonAdd, buttonSub, buttonMul, buttonDiv, buttonMod; JButton buttonSqrt, buttonDao, buttonEqual; JMenu editMenu, viewMenu, helpMenu; JMenuItem copyItem, pasteItem, tItem, sItem, numberGroup, topHelp, aboutCal; DecimalFormat df; /设置数据输出精度 boolean clickable; /控制当前能否按键 double memoryd; /使用内存中存储的数字 int memoryi; double vard, answerd; /用来保存double型数据的中间值(vard)和最后结果(answerd) short key = -1, prekey = -1; /key用来保存当前进行何种运算,prekey用来保存前次进行何种运算 boolean sign; /判断是否是double型数参与运算，是为true，不是为false String copy; /做复制用 JTextArea help; /帮助 JScrollPane scrollHelp; Object temp; /临时对象 /构造函数 public Calculator() clickable = true; answerd = 0; frame = new JFrame("计算器"); df = new DecimalFormat("0.#"); /设置数据输出精度(对于double型值) textAnswer = new JTextField(15); textAnswer.setText(""); textAnswer.setEditable(false); textAnswer.setBackground(new Color(255, 255, 255); panel = new JPanel(); frame.getContentPane().add(panel); panel1 = new JPanel(); panel2 = new JPanel(); panel.setLayout(new BorderLayout(); /设计整个面板 mainMenu = new JMenuBar(); editMenu = new JMenu("编辑(E)"); viewMenu = new JMenu("查看(V)"); helpMenu = new JMenu("帮助(H)"); copyItem = new JMenuItem(" 复制(C) Ctrl+C"); copyItem.addActionListener(this); pasteItem = new JMenuItem(" 粘贴(V) Ctrl+V"); pasteItem.addActionListener(this); editMenu.add(copyItem); editMenu.add(pasteItem); tItem = new JMenuItem("标准型(T)"); tItem.addActionListener(this); sItem = new JMenuItem(" 科学型(S)"); sItem.addActionListener(this); viewMenu.add(tItem); viewMenu.add(sItem); topHelp = new JMenuItem(" 帮助主题(H)"); topHelp.addActionListener(this); help = new JTextArea(5, 20); scrollHelp = new JScrollPane(help); help.setEditable(false); help.append("执行简单计算n"); help.append("1. 键入计算的第一个数字。n"); help.append("2. 单击“+”执行加、“-”执行减、“*”执行乘或“/”执行除。n"); help.append("3. 键入计算的下一个数字。n"); help.append("4. 输入所有剩余的运算符和数字。n"); help.append("5. 单击“=”。n"); aboutCal = new JMenuItem(" 关于计算器(A)"); aboutCal.addActionListener(this); helpMenu.add(topHelp); helpMenu.add(aboutCal); mainMenu.add(editMenu); mainMenu.add(viewMenu); mainMenu.add(helpMenu); panel.add(mainMenu, BorderLayout.NORTH); panel.add(textAnswer, BorderLayout.CENTER); panel.add(panel1, BorderLayout.SOUTH); panel1.setLayout(new BorderLayout(); textMemory = new JTextField(3); textMemory.setEditable(false); textMemory.setBackground(new Color(217, 217, 217); labelMemSpace = new JLabel(" "); buttonBk = new JButton("Backspace"); buttonBk.setForeground(new Color(255, 0, 0); buttonCe = new JButton("CE"); buttonCe.setForeground(new Color(255, 0, 0); buttonC = new JButton("C"); buttonC.setForeground(new Color(255, 0, 0); buttonBk.addActionListener(this); buttonCe.addActionListener(this); buttonC.addActionListener(this); panel1.add(panel2, BorderLayout.NORTH); panel2.setLayout(new FlowLayout(FlowLayout.RIGHT); panel2.add(textMemory); panel2.add(labelMemSpace); panel2.add(buttonBk); panel2.add(buttonCe); panel2.add(buttonC); panel3 = new JPanel(); panel1.add(panel3, BorderLayout.CENTER); button = new JButton10; for (int i = 0; i < button.length; i+) buttoni = new JButton(Integer.toString(i); buttoni.setForeground(new Color(0, 0, 255); buttonMC = new JButton("MC"); buttonMC.setForeground(new Color(255, 0, 0); buttonMR = new JButton("MR"); buttonMR.setForeground(new Color(255, 0, 0); buttonMS = new JButton("MS"); buttonMS.setForeground(new Color(255, 0, 0); buttonMAdd = new JButton("M+"); buttonMAdd.setForeground(new Color(255, 0, 0); buttonDot = new JButton("."); buttonDot.setForeground(new Color(0, 0, 255); buttonAddAndSub = new JButton("+/-"); buttonAddAndSub.setForeground(new Color(0, 0, 255); buttonAdd = new JButton("+"); buttonAdd.setForeground(new Color(255, 0, 0); buttonSub = new JButton("-"); buttonSub.setForeground(new Color(255, 0, 0); buttonMul = new JButton("*"); buttonMul.setForeground(new Color(255, 0, 0); buttonDiv = new JButton("/"); buttonDiv.setForeground(new Color(255, 0, 0); buttonMod = new JButton("%"); buttonMod.setForeground(new Color(0, 0, 255); buttonSqrt = new JButton("sqrt"); buttonSqrt.setForeground(new Color(0, 0, 255); buttonDao = new JButton("1/x"); buttonDao.setForeground(new Color(0, 0, 255); buttonEqual = new JButton("="); buttonEqual.setForeground(new Color(255, 0, 0); /将所有行为与监听绑定 panel3.setLayout(new GridLayout(4, 6); panel3.add(buttonMC); buttonMC.addActionListener(this); panel3.add(button7); button7.addActionListener(this); panel3.add(button8); button8.addActionListener(this); panel3.add(button9); button9.addActionListener(this); panel3.add(buttonDiv); buttonDiv.addActionListener(this); panel3.add(buttonSqrt); buttonSqrt.addActionListener(this); panel3.add(buttonMR); buttonMR.addActionListener(this); panel3.add(button4); button4.addActionListener(this); panel3.add(button5); button5.addActionListener(this); panel3.add(button6); button6.addActionListener(this); panel3.add(buttonMul); buttonMul.addActionListener(this); panel3.add(buttonMod); buttonMod.addActionListener(this); panel3.add(buttonMS); buttonMS.addActionListener(this); panel3.add(button1); button1.addActionListener(this); panel3.add(button2); button2.addActionListener(this); panel3.add(button3); button3.addActionListener(this); panel3.add(buttonSub); buttonSub.addActionListener(this); panel3.add(buttonDao); buttonDao.addActionListener(this); panel3.add(buttonMAdd); buttonMAdd.addActionListener(this); panel3.add(button0); button0.addActionListener(this); panel3.add(buttonAddAndSub); buttonAddAndSub.addActionListener(this); panel3.add(buttonDot); buttonDot.addActionListener(this); panel3.add(buttonAdd); buttonAdd.addActionListener(this); panel3.add(buttonEqual); buttonEqual.addActionListener(this); frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE); frame.pack(); frame.setVisible(true); /设置各个按钮行为 public void actionPerformed(ActionEvent event) temp = event.getSource(); sign = false; try /如果按下数据按钮，将按下的按钮代表的数据插入的当前文本框字符串之后 for (int i = 0; i <= 9; i+) if (temp = buttoni && clickable = true) textAnswer.setText(textAnswer.getText() + Integer.toString(i); /按下'.'按钮时，判断当前文本框内字符串中含不含'.'，如果已含，则不允许再插入'.' if (temp = buttonDot && clickable = true) pressPoint(); /按下+、-、*、/ if ( (temp = buttonAdd | temp = buttonSub | temp = buttonMul | temp = buttonDiv) && clickable = true) /'+'操作 if (temp = buttonAdd) pressAdd(); /'-'操作 if (temp = buttonSub) pressSub(); /'*'操作 if (temp = buttonMul) pressMul(); /'/'操作 if (temp = buttonDiv) pressDiv(); /'='操作 if (temp = buttonEqual && clickable = true) pressEqaul(); /'%'操作，对第二个操作数除以100 if (temp = buttonMod && clickable = true) pressMod(); /开根号运算 if (temp = buttonSqrt && clickable = true) pressSqrt(); /倒数运算 if (temp = buttonDao && clickable = true) pressDao(); /按下'+/-'按钮时处理 if (temp = buttonAddAndSub && clickable = true) pressAddAndSub(); /计算器有关内存操作 /'MC'的操作，将内存清0 if (temp = buttonMC && clickable = true) pressMC(); /'MS'的操作，将当前文本框内容保存入内存，显示'M' if (temp = buttonMS && clickable = true) pressMS(); /'MR'的操作，将存储器中的信息输出 if (temp = buttonMR && clickable = true) pressMR(); /'M+'的功能，将当前文本框里的数据和存储器中数据相加后，再存入存储器 if (temp = buttonMAdd && clickable = true) pressMAdd(); /按下'Backspace'键，利用循环将当前字符串中的最后一个字母删除 if (temp = buttonBk && clickable = true) pressBK(); /按下'CE'按钮，将当前文本框内数据清除 if (temp = buttonCe) pressCE(); /按下'C'按钮，文本框内数据清除，同时var,answer清0 if (temp = buttonC) pressC(); /按下'复制'菜单栏 if (temp = copyItem) copy = textAnswer.getText(); /按下'粘贴'菜单栏 if (temp = pasteItem) textAnswer.setText(copy); if (temp = sItem) JOptionPane.showMessageDialog(panel, "当前是标准型计算器，n科学型计算器有待更新。"); /按下'帮助主题'菜单栏 if (temp = topHelp) JOptionPane.showMessageDialog(panel, scrollHelp); /按下'关于'菜单栏 if (temp = aboutCal) JOptionPane.showMessageDialog(panel, "计算器1.00版n"); /输入中如果有操作非法，比如按下两次'+'，捕获异常 catch (Exception e) textAnswer.setText("操作非法"); clickable = false; private void pressPoint() /按下小数点 boolean isDot = false; if (textAnswer.getText().length() = 0) isDot = true; for (int i = 0; i < textAnswer.getText().length(); i+) if ('.' = textAnswer.getText().charAt(i) isDot = true; break; if (isDot = false) textAnswer.setText(textAnswer.getText() + "."); private void pressAdd() /按下加号 switch (prekey) case 0: answerd += Double.parseDouble(textAnswer.getText(); break; case 1: answerd -= Double.parseDouble(textAnswer.getText(); break; case 2: answerd *= Double.parseDouble(textAnswer.getText(); break; case 3: if (Double.parseDouble(textAnswer.getText() = 0) textAnswer.setText("除数不能为零"); clickable = false; else answerd /= Double.parseDouble(textAnswer.getText(); break; default: answerd = Double.parseDouble(textAnswer.getText(); textAnswer.setText(""); prekey = key = 0; private void pressSub() /按下减号 switch (prekey) case 0: answerd += Double.parseDouble(textAnswer.getText(); break; case 1: answerd -= Double.parseDouble(textAnswer.getText(); break; case 2: answerd *= Double.parseDouble(textAnswer.getText(); break; case 3: if (Double.parseDouble(textAnswer.getText() = 0) textAnswer.setText("除数不能为零"); clickable = false; else answerd /= Double.parseDouble(textAnswer.getText(); break; default: answerd = Double.parseDouble(textAnswer.getText(); textAnswer.setText(""); prekey = key = 1; private void pressMul() /按下乘号 switch (prekey) case 0: answerd += Double.parseDouble(textAnswer.getText(); break; case 1: answerd -= Double.parseDouble(textAnswer.getText(); break; case 2: answerd *= Double.parseDouble(textAnswer.getText(); break; case 3: if (Double.parseDouble(textAnswer.getText() = 0) textAnswer.setText("除数不能为零"); clickable = false; else answerd /= Double.parseDouble(textAnswer.getText(); break; default: answerd = Double.parseDouble(textAnswer.getText(); textAnswer.setText(""); prekey = key = 2; private void pressDiv() /按下除号 switch (prekey) case 0: answerd += Double.parseDouble(textAnswer.getText(); break; case 1: answerd -= Double.parseDouble(textAnswer.getText(); break; case 2: answerd *= Double.parseDouble(textAnswer.getText(); break; case 3: if (Double.parseDouble(textAnswer.getText() = 0) textAnswer.setText("除数不能为零"); clickable = false; else answerd /= Double.parseDouble(textAnswer.getText(); break; default: answerd = Double.parseDouble(textAnswer.getText(); textAnswer.setText(""); prekey = key = 3; private void pressEqaul() /按下等号 /如果连续按'=',则进行连续运算 if (prekey = 5) if (key = 0) answerd += vard; textAnswer.setText(df.format(answerd); if (key =
