多功能科学计算器

学号Java程序设计实验报告实验六多功能科学计算器学生姓名专业、班级指导教师成绩电子与信息工程系2012年6月24日实验六多功能科学计算器一、实验目的1．掌握Java图形组件和布局管理器的使用；2．掌握使用Java事件处理机制的使用；3．掌握图形界面的各种控件的使用，如：标签、文本框、按钮、复选框、列表框、窗框等。

二、实验要求1．采用布局管理器进行界面的布局；2．学会对不同的事件用相应的事件处理器；3．写出实验报告。

要求记录编译和执行Java程序当中的系统错误信息提材示，并给出解决办法。

三、实验环境1．计算机一台；2．JDK、MyEclipse工具软件。

四、实验内容1．在随堂练习的简单计算器基础上设计一个多功能计算器。

包括复杂的功能：比如记忆功能，三角函数，成方，对数等等。

五、实验步骤1．运用一种或多种布局管理器，绘制出界面；2．为各种按钮注册事件监听器，使其点击按钮，并在显示区域同步显示当前输入或运算结果；3．编译运行程序，检查计算器的正确性。

六、实验程序package calculator;import java.awt.BorderLayout;import java.awt.Button;import java.awt.GridLayout;import java.awt.Panel;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import javax.swing.JFrame;import javax.swing.JTextField;public class Calculatorpublic static JFrame frame = new JFrame("计算器"); public static JTextField text = new JTextField(30); static double fistNumber;static double secondNumber;static double result;static char operator;private Button buttonBack;private Button buttonCancel; // 清除当前数字private Button buttonCanAll; // 清除所有数据private Button buttonPN; // 正负号按钮private Button buttonSqrt; // 开平方运算private Button button7;private Button button8;private Button button9;private Button buttonDivide;private Button buttonPercent;private Button button4;private Button button5;private Button button6;private Button buttonMutiply;private Button buttonReciprocal;private Button button1;private Button button2;private Button button3;private Button buttonSub;private Button buttonEqual;private Button button0;private Button buttonPoint;private Button buttonAdd;private Button button24;private Button button25;static boolean Nu1flag = true;static boolean Nu2flag;static boolean poiFlag;static int precision;public void create(){frame.add(text, BorderLayout.NORTH);frame.setResizable(false);text.setHorizontalAlignment(JTextField.RIGHT);Panel panel = new Panel();panel.setLayout(new GridLayout(5, 5));frame.add(panel, BorderLayout.CENTER);buttonBack = new Button("Bcak Space");buttonCancel = new Button("CE"); // 清除当前数字buttonCancel.addActionListener(new ButCEListener());buttonCanAll = new Button("C"); // 清除所有数据buttonCanAll.addActionListener(new ButCAllListener());buttonPN = new Button("+/-"); // 正负号按钮buttonPN.addActionListener(new ButPNListener());buttonSqrt = new Button("√"); // 开平方运算button7 = new Button("7");button7.addActionListener(new NuButListener(7));button8 = new Button("8");button8.addActionListener(new NuButListener(8));button9 = new Button("9");button9.addActionListener(new NuButListener(9));buttonDivide = new Button("/");buttonDivide.addActionListener(new OpButListener('/'));buttonPercent = new Button("%");button4 = new Button("4");button4.addActionListener(new NuButListener(4));button5 = new Button("5");button5.addActionListener(new NuButListener(5));button6 = new Button("6");button6.addActionListener(new NuButListener(6));buttonMutiply = new Button("*");buttonMutiply.addActionListener(new OpButListener('*'));buttonReciprocal = new Button("1/x");button1 = new Button("1");button1.addActionListener(new NuButListener(1));button2 = new Button("2");button2.addActionListener(new NuButListener(2)); button3 = new Button("3");button3.addActionListener(new NuButListener(3)); buttonSub = new Button("-");buttonSub.addActionListener(new OpButListener('-')); buttonEqual = new Button("=");buttonEqual.addActionListener(new ButEqualListener()); button0 = new Button("0");button0.addActionListener(new NuButListener(0)); buttonPoint = new Button(".");buttonPoint.addActionListener(new ButPointListener()); buttonAdd = new Button("+");buttonAdd.addActionListener(new OpButListener('+')); button24 = new Button("24");button24.setVisible(false);button25 = new Button("25");button25.setVisible(false);panel.add(buttonBack);panel.add(buttonCancel);panel.add(buttonCanAll);panel.add(buttonPN);panel.add(buttonSqrt);panel.add(button7);panel.add(button8);panel.add(button9);panel.add(buttonDivide);panel.add(buttonPercent);panel.add(button4);panel.add(button5);panel.add(button6);panel.add(buttonMutiply);panel.add(buttonReciprocal);panel.add(button1);panel.add(button2);panel.add(button3);panel.add(buttonSub);panel.add(button25);panel.add(button0);panel.add(button24);panel.add(buttonPoint);panel.add(buttonAdd);panel.add(buttonEqual);frame.pack();frame.setVisible(true);}public static void main(String[] args){Calculator c = new Calculator();c.create();}}class NuButListener implements ActionListener //数字键监听器{private int nu;public NuButListener(int i){nu = i;}@Overridepublic void actionPerformed(ActionEvent e){if (Calculator.poiFlag == false) //输入的是整数位数{if (Calculator.Nu1flag == true){Calculator.fistNumber = Calculator.fistNumber * 10 + nu;Calculator.text.setText(Double.toString(Calculator.fistNumber));}if (Calculator.Nu2flag == true){Calculator.secondNumber = Calculator.secondNumber * 10 + nu;Calculator.text.setText(Double.toString(Calculator.secondNumber)) ;}}if(Calculator.poiFlag == true) //输入的是小数倍数{if (Calculator.Nu1flag == true){double lastNu = nu * 1.0; //将要加上的最后一位小数for(int i = Calculator.precision; i > 0; i--){lastNu = lastNu / 10;}Calculator.fistNumber = Calculator.fistNumber + lastNu;Calculator.precision++;Calculator.text.setText(Double.toString(Calculator.fistNumber));}if (Calculator.Nu2flag == true){double lastNu = nu * 1.0; //将要加上的最后一位小数for(int i = Calculator.precision; i > 0; i--){lastNu = lastNu / 10;}Calculator.secondNumber = Calculator.secondNumber + lastNu;Calculator.precision++;Calculator.text.setText(Double.toString(Calculator.secondNumber)) ;}}}}class OpButListener implements ActionListener{private char op;public OpButListener(char c){op = c;}@Overridepublic void actionPerformed(ActionEvent e){Calculator.secondNumber = 0;Calculator.operator = op;Calculator.Nu2flag = true;Calculator.Nu1flag = false;Calculator.poiFlag = false;}}class ButEqualListener implements ActionListener{@Overridepublic void actionPerformed(ActionEvent e){if(Calculator.operator == '+'){Calculator.result = Calculator.fistNumber + Calculator.secondNumber;Calculator.text.setText(Double.toString(Calculator.result));Calculator.fistNumber = Calculator.result;Calculator.Nu1flag = true;}if(Calculator.operator == '-'){Calculator.result = Calculator.fistNumber - Calculator.secondNumber;Calculator.text.setText(Double.toString(Calculator.result));Calculator.fistNumber = Calculator.result;Calculator.Nu1flag = true;}if(Calculator.operator == '*'){Calculator.result = Calculator.fistNumber * Calculator.secondNumber;Calculator.text.setText(Double.toString(Calculator.result));Calculator.fistNumber = Calculator.result;Calculator.Nu1flag = true;}if(Calculator.operator == '/'){if (Calculator.secondNumber != 0){Calculator.result = Calculator.fistNumber/ Calculator.secondNumber;Calculator.text.setText(Double.toString(Calculator.result));Calculator.fistNumber = Calculator.result;Calculator.Nu1flag = true;}else{Calculator.text.setText("除数不能为0");}}}}class ButPNListener implements ActionListener{@Overridepublic void actionPerformed(ActionEvent e){if(Calculator.Nu1flag == true){Calculator.fistNumber = -Calculator.fistNumber;Calculator.text.setText(Double.toString(Calculator.fistNumber));}if(Calculator.Nu2flag == true){Calculator.secondNumber = -Calculator.secondNumber;Calculator.text.setText(Double.toString(Calculator.secondNumber)) ;}}}class ButPointListener implements ActionListener{@Overridepublic void actionPerformed(ActionEvent e){Calculator.poiFlag = true;Calculator.precision = 1;}}class ButCEListener implements ActionListener{@Overridepublic void actionPerformed(ActionEvent e){if(Calculator.Nu1flag == true){Calculator.fistNumber = 0;Calculator.text.setText(Double.toString(Calculator.secondNumber)) ;}else{Calculator.secondNumber = 0;Calculator.text.setText(Double.toString(Calculator.secondNumber)) ;}}}class ButCAllListener implements ActionListener{@Overridepublic void actionPerformed(ActionEvent e){Calculator.fistNumber = Calculator.secondNumber = Calculator.result = 0;Calculator.precision = 0;Calculator.Nu1flag = true;Calculator.Nu2flag = Calculator.poiFlag = false;Calculator.operator = Character.NON_SPACING_MARK;Calculator.text.setText(Double.toString(0));Java语言程序设计A实验指导}}class MyWindowAdapter extends WindowAdapter {@Overridepublic void windowClosing(WindowEvent e) {System.exit(0);}}七、实验结果11。