科学计算器程序Java代码
java科学计算器源代码
import java.awt.*;import javax.swing.*;import java.awt.event.*;class Counter extends WindowAdapter{static JFrame f=new JFrame("计算器"); static JTextField text1=new JTextField("0."); static String source="";static String cal="";static String object="";static boolean flag=false;static boolean flag1=true;static boolean flag2=false;public void init(){try{Container c=f.getContentPane();JPanel pan1=new JPanel();JButton b1=new JButton("1");JButton b2=new JButton("2");JButton b3=new JButton("3");JButton b4=new JButton("4");JButton b5=new JButton("5");JButton b6=new JButton("6");JButton b7=new JButton("7");JButton b8=new JButton("8");JButton b9=new JButton("9");JButton b0=new JButton("0");JButton b11=new JButton("+");JButton b12=new JButton("-");JButton b13=new JButton("*");JButton b14=new JButton("/");JButton b15=new JButton(".");JButton b16=new JButton("=");JButton bclar=new JButton("清零");text1.setHorizontalAlignment(JTextField.RIGHT);c.add(text1,"North");c.add(pan1);A aa=new A();Result re=new Result();Opertion op=new Opertion();Clar cl=new Clar();b1.addActionListener(aa);b2.addActionListener(aa);b3.addActionListener(aa);b4.addActionListener(aa);b5.addActionListener(aa);b6.addActionListener(aa);b7.addActionListener(aa);b8.addActionListener(aa);b9.addActionListener(aa);b0.addActionListener(aa);b11.addActionListener(op);b12.addActionListener(op);b13.addActionListener(op);b14.addActionListener(op);b16.addActionListener(re);b15.addActionListener(aa);bclar.addActionListener(cl);pan1.add(b1);pan1.add(b2);pan1.add(b3);pan1.add(b11);pan1.add(b4);pan1.add(b5);pan1.add(b6);pan1.add(b12);pan1.add(b7);pan1.add(b8);pan1.add(b9);pan1.add(b13);pan1.add(b0);pan1.add(b15);pan1.add(b16);pan1.add(b14);pan1.add(bclar);f.setSize(200,220);f.setVisible(true);}catch(Exception e){System.out.println(e.getMessage());}}class A implements ActionListener{public void actionPerformed(ActionEvent e) {String a=text1.getText();String s=e.getActionCommand();if(a.equals("0.")||a.equals("+")||a.equals("-")||a.equals("*")||a.equals("/")) text1.setText(s);else {if(flag2){text1.setText(s);flag2=false;}elsetext1.setText(a+s);}}}class Opertion implements ActionListener{public void actionPerformed(ActionEvent e){cal=e.getActionCommand();if(flag1==true)source=text1.getText();text1.setText(cal);flag1=false;flag=true;}}class Result implements ActionListener{public void actionPerformed(ActionEvent e){double num1;num1=Double.parseDouble(source); object=text1.getText();double num2;num2=Double.parseDouble(object); double result=0;if(cal.equals("+"))result=num1+num2;if(cal.equals("-"))result=num1-num2;if(cal.equals("*"))result=num1*num2;if(cal.equals("/"))if(num2==0)text1.setText("除数不能为0");elseresult=num1/num2;String s1=Double.toString(result);text1.setText(s1);flag1=true;flag2=true;}}class Clar implements ActionListener{public void actionPerformed(ActionEvent e) {text1.setText("0.");}}public static void main(String[] args){Counter count=new Counter();count.init();}public void windowClosing(WindowEvent e){ System.exit(1);}public void windowOpened(WindowEvent e){} public void windowIconified(WindowEvent e){} public void windowDeiconified(WindowEvent e){} public void windowClosed(WindowEvent e){} public void windowActivated(WindowEvent e){} public void windowDeactivated(WindowEvent e){} }。
科学计算器程序Java代码
科学计算器程序Java代码MC：清除独立内存里的数字MR：读出独立内存数字MS：将显示数字保存到独立内存,并取代内存中原有数字M+：将显示数字向独立内存累加(独立内存是一个临时寄放数字的存储器,方便计算)CE：纠错键(CLEAR ERROR).输入数字有错,按它可以重新输入C：表示清零,将计算器恢复到开机状态功能举例：源程序如下：import java.awt.BorderLayout;import javax.swing.JRadioButtonMenuItem; import javax.swing.JTextField;public class Calucator extends JFrame { private JTextField tf;private JPanel panel1, panel2, panel3, panel4;private JMenuBar myBar;private JMenu menu1, menu2, menu3;private JMenuItem editItem1, editItem2, help1, help2, help3;private JRadioButtonMenuItem seeItem1, seeItem2;//单选框private JCheckBoxMenuItem seeItem3;//复选框private ButtonGroup bgb;private String back;private boolean IfResult = true, flag = false;private String oper = "=";private double result = 0;private Num numActionListener;private DecimalFormat df;public Calucator(){super("科学计算器");//设置标题栏df= new DecimalFormat("#.####");//保留四位小数this.setLayout(new BorderLayout(10, 5));panel1 = new JPanel(new GridLayout(1, 3, 10, 10));panel2 = new JPanel(new GridLayout(5, 6, 5, 5));//5行6列panel3 = new JPanel(new GridLayout(5, 1, 5, 5));panel4= new JPanel(new BorderLayout(5, 5));/***菜单栏*/myBar = new JMenuBar();menu1 = new JMenu("编辑(E)");menu2 = new JMenu("查看(V)");menu3 = new JMenu("帮助(H)");menu1.setFont(new Font("宋体", Font.PLAIN, 12));menu2.setFont(new Font("宋体", Font.PLAIN, 12));menu3.setFont(new Font("宋体", Font.PLAIN, 12));/***编辑栏*/editItem1= new JMenuItem("复制(C) Ctrl+C");editItem2= new JMenuItem("粘贴(P) Ctrl+V");editItem1.setFont(new Font("宋体",Font.PLAIN,12));editItem2.setFont(new Font("宋体",Font.PLAIN,12));/***查看栏*/seeItem1= new JRadioButtonMenuItem("科学型(T)");seeItem2= new JRadioButtonMenuItem("标准型(S)");seeItem3= new JCheckBoxMenuItem("数字分组(I)");seeItem1.setFont(new Font("宋体",Font.PLAIN,12));seeItem2.setFont(new Font("宋体",Font.PLAIN,12));seeItem3.setFont(new Font("宋体",Font.PLAIN,12));/***帮助栏*/help1 = new JMenuItem("帮助主题(H)");help2= new JMenuItem("关于计算器(A)");help1.setFont(new Font("宋体",Font.PLAIN,12));help2.setFont(new Font("宋体",Font.PLAIN,12));bgb = new ButtonGroup();//选项组menu1.add(editItem1);menu1.add(editItem2);menu2.add(seeItem1);menu2.add(seeItem2);menu2.addSeparator();//添加一条分割线menu2.add(seeItem3);menu3.add(help1);menu3.addSeparator();//添加一条分割线menu3.add(help2);myBar.add(menu1);myBar.add(menu2);myBar.add(menu3);this.setJMenuBar(myBar);numActionListener= new Num();//实现数字监听/***文本域，即为计算器的屏幕显示区域*/tf = new JTextField();tf.setEditable(false);//文本区域不可编辑tf.setBackground(Color.white);//文本区域的背景色tf.setHorizontalAlignment(JTextField.RIGH T);//文字右对齐tf.setText("0");tf.setBorder(BorderFactory.createLoweredB evelBorder());init();//对计算器进行初始化}/***初始化操作*添加按钮*/private void init(){addButton(panel1, "Backspace", newClear(), Color.red);addButton(panel1, "CE", new Clear(), Color.red);addButton(panel1, "C", new Clear(), Color.red);addButton(panel2, "1/x", new Signs(), Color.magenta);addButton(panel2, "log", new Signs(), Color.magenta);addButton(panel2, "7", numActionListener, Color.blue);addButton(panel2, "8", numActionListener, Color.blue);addButton(panel2, "9", numActionListener, Color.blue);addButton(panel2, "÷", new Signs(), Color.red);addButton(panel2, "n!", new Signs(), Color.magenta);addButton(panel2, "sqrt", new Signs(), Color.magenta);addButton(panel2, "4", numActionListener, Color.blue);addButton(panel2, "5", numActionListener, Color.blue);addButton(panel2, "6", numActionListener, Color.blue);addButton(panel2, "×", new Signs(), Color.red);addButton(panel2, "sin", new Signs(), Color.magenta);addButton(panel2, "x^2", new Signs(), Color.magenta);addButton(panel2, "1", numActionListener, Color.blue);addButton(panel2, "2", numActionListener, Color.blue);addButton(panel2, "3", numActionListener, Color.blue);addButton(panel2, "-", new Signs(), Color.red);addButton(panel2, "cos", new Signs(), Color.magenta);addButton(panel2, "x^3", new Signs(), Color.magenta);addButton(panel2, "0", numActionListener, Color.blue);addButton(panel2, "-/+", new Clear(), Color.blue);addButton(panel2, ".", new Dot(), Color.blue);addButton(panel2, "+", new Signs(), Color.red);addButton(panel2, "tan", new Signs(), Color.magenta);addButton(panel2, "%", new Signs(), Color.magenta);addButton(panel2, "π", numActionListener, Color.orange);addButton(panel2, "e", numActionListener, Color.orange);addButton(panel2, "′″", new Signs(), Color.orange);addButton(panel2, "=", new Signs(), Color.red);JButton btns = new JButton("计算器");btns.setBorder(BorderFactory.createLowere dBevelBorder());btns.setEnabled(false);//按钮不可操作btns.setPreferredSize(new Dimension(20, 20));panel3.add(btns);//加入按钮addButton(panel3, "MC", null, Color.red);addButton(panel3, "MR", null, Color.red);addButton(panel3, "MS", null, Color.red);addButton(panel3, "M+", null, Color.red);panel4.add(panel1,BorderLayout.NORTH);panel4.add(panel2,BorderLayout.CENTER);this.add(tf, BorderLayout.NORTH);this.add(panel3, BorderLayout.WEST);this.add(panel4);pack();this.setResizable(false);//窗口不可改变大小this.setLocation(300, 200);this.setDefaultCloseOperation(JFrame.EXIT _ON_CLOSE);}/***统一设置按钮的的使用方式*@param panel*@param name*@param action*@param color*/private void addButton(JPanel panel, String name, ActionListener action, Color color){JButton bt = new JButton(name);panel.add(bt);//在面板上增加按钮bt.setForeground(color);//设置前景（字体）颜色bt.addActionListener(action);//增加监听事件}/***计算器的基础操作（+-×÷）*@param x*/private void getResult (double x){if(oper == "+"){result += x;}else if(oper == "-"){result -= x;}else if(oper == "×"){result *= x;}else if(oper == "÷"){result /= x;}else if(oper == "="){result = x;}tf.setText(df.format(result));}/***运算符号的事件监听*/class Signs implements ActionListener{ public void actionPerformed(ActionEvent e) {/** 用ActionEvent对象的getActionCommand()方法* 取得与引发事件对象相关的字符串*/String str = e.getActionCommand();/* sqrt求平方根*/if(str.equals("sqrt")){double i = Double.parseDouble(tf.getText());if(i>=0){/** String.valueOf() 转换为字符串* df.format() 按要求保留四位小数* Math.sqrt() 求算数平方根*/tf.setText(String.valueOf(df.format(Math.sq rt(i))));}else{tf.setText("负数不能开平方根");}}/* log求常用对数*/else if(str.equals("log")){double i = Double.parseDouble(tf.getText());if(i>0){tf.setText(String.valueOf(df.format(Math.lo g(i))));}else{tf.setText("负数不能求对数");}}/* %求百分比*/else if(str.equals("%")){tf.setText(df.format(Double.parseDouble(tf. getText()) / 100));}/* 1/x求倒数*/else if(str.equals("1/x")){if(Double.parseDouble(tf.getText()) == 0){tf.setText("除数不能为零");}else{tf.setText(df.format(1 / Double.parseDouble(tf.getText())));}}/* sin求正弦函数*/else if(str.equals("sin")){double i = Double.parseDouble(tf.getText());tf.setText(String.valueOf(df.format(Math.si n(i))));}/* cos求余弦函数*/else if(str.equals("cos")){double i = Double.parseDouble(tf.getText());tf.setText(String.valueOf(df.format(Math.co s(i))));}/* tan求正切函数*/else if(str.equals("tan")){double i = Double.parseDouble(tf.getText());tf.setText(String.valueOf(df.format(Math.ta n(i))));}/* n!求阶乘*/else if(str.equals("n!")){double i = Double.parseDouble(tf.getText());if((i%2==0)||(i%2==1))//判断为整数放进行阶乘操作{int j = (int)i;//强制类型转换int result=1;for(int k=1;k<=j;k++)result *= k;tf.setText(String.valueOf(result));}else{tf.setText("无法进行阶乘");}}/* x^2求平方*/else if(str.equals("x^2")){double i = Double.parseDouble(tf.getText());tf.setText(String.valueOf(df.format(i*i)));}/* x^3求立方*/else if(str.equals("x^3")){double i =Double.parseDouble(tf.getText());tf.setText(String.valueOf(df.format(i*i*i)));}/* ′″角度转换*//***将角度值转换成弧度值，方便三角函数的计算*/else if(str.equals("′″")){double i = Double.parseDouble(tf.getText());tf.setText(String.valueOf(i/180*Math.PI));}else{if(flag){IfResult = false;}if(IfResult){oper = str;}else{getResult(Double.parseDouble(tf.getText()) );oper = str;IfResult = true;}}}}/***清除按钮的事件监听*/class Clear implements ActionListener{ public void actionPerformed(ActionEvent e) {/** 用ActionEvent对象的getActionCommand()方法* 取得与引发事件对象相关的字符串*/String str = e.getActionCommand();if(str == "C"){tf.setText("0");IfResult = true;result = 0;}else if(str == "-/+"){double i = 0 - Double.parseDouble(tf.getText().trim());tf.setText(df.format(i));}else if(str == "Backspace"){if(Double.parseDouble(tf.getText()) > 0){if(tf.getText().length() > 1){tf.setText(tf.getText().substring(0,tf.getText().length() - 1));//使用退格删除最后一位字符}else{tf.setText("0");IfResult = true;}}else{if(tf.getText().length() > 2){tf.setText(tf.getText().substring(0,tf.getText().length() - 1));}else{tf.setText("0");IfResult = true;}}}else if(str == "CE"){tf.setText("0");IfResult = true;}}}/***数字输入的事件监听*/class Num implements ActionListener{ public void actionPerformed(ActionEvent e) {String str = e.getActionCommand(); if(IfResult){tf.setText("");IfResult = false;}if(str=="π"){tf.setText(String.valueOf(Math.PI)); }else if(str=="e"){tf.setText(String.valueOf(Math.E)); }else{tf.setText(tf.getText().trim() + str);if(tf.getText().equals("0")){tf.setText("0");IfResult = true;flag = true;}}}}/***小数点的事件监听*/class Dot implements ActionListener{ public void actionPerformed(ActionEvent e) {IfResult = false;if(tf.getText().trim().indexOf(".") == -1){tf.setText(tf.getText() + ".");}}}/***main方法*/public static void main(String[] args) { new Calucator().setVisible(true);}}。
计算器JAVA源代码
import java.awt.*;import javax.swing.*;import java.awt.Event.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class Calculation extends JFrame implements ActionListener {private JTextField result;JTextField fm;Double dm = 0d;public Calculation(){super("计算器");result = new JTextField("0",30);result.setBackground(Color.white);result.setHorizontalAlignment(JTextField.RIGHT);result.setEditable(false);JPanel resultpanel = new JPanel();resultpanel.add(result);fm = new JTextField(2);JButton b1= new JButton("Backspace");JButton b2= new JButton("CE");JButton b3= new JButton("C");JPanel ControalPanel = new JPanel();ControalPanel.setLayout(new GridLayout(1,4,2,2));ControalPanel.add(fm);ControalPanel.add(b1);ControalPanel.add(b2);ControalPanel.add(b3);b1.addActionListener(this);b2.addActionListener(this);b3.addActionListener(this);String dckey [] = {"MC","0","1","2","3","4","5","6","7","8","9","/","sqrt","MR","*","%","MS","-","1/x","M+","+/-" ,".","+","="};JPanel dckeypanel =new JPanel();dckeypanel.setLayout(new GridLayout(4,6,2,2));for(int i=0;i<24;i++){JButton b = new JButton(dckey[i]);dckeypanel.add(b);b.addActionListener(this);}Container ct = this.getContentPane();ct.setLayout(new BorderLayout());ct.add(resultpanel,BorderLayout.NORTH);ct.add(ControalPanel,BorderLayout.CENTER);ct.add(dckeypanel,BorderLayout.SOUTH);pack();setVisible(true);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}private boolean newDigital = true;private int optionvalue;private String operation = "";private Double d,d1,d2;public void actionPerformed(ActionEvent e){String s = (e.getActionCommand());String str = result.getText();if(s.equals("Backspace")){String s1 = result.getText();result.setText(s1.substring(0,s1.length()-1));}if(s.equals("CE")){result.setText("0");newDigital = true;}if(s.equals("C")){result.setText("0");optionvalue = 0;newDigital = true;}if(s.equals("0")||s.equals("1")||s.equals("2")||s.equals("3")||s.equals("4")||s.equals("5")||s.equal s("6")||s.equals("7")||s.equals("8")||s.equals("9")){if(!newDigital){result.setText(str+s);}else{result.setText(s);newDigital = false;}return;}if(s.equals(".")){if(result.getText().trim().startsWith("0")){result.setText("0.");newDigital = false;}else{result.setText(str+".");}return;}if(s.equals("+/-")){d = Double.parseDouble(str.trim());result.setText(String.valueOf((-d)));return;}if(s.equals("+")){d1 = Double.parseDouble(result.getText());optionvalue = 1;result.setText("");}if(s.equals("-")){d1 = Double.parseDouble(result.getText());optionvalue = 2;result.setText("");}if(s.equals("*")){d1 = Double.parseDouble(result.getText());optionvalue = 3;result.setText("");}if(s.equals("/")){d1 = Double.parseDouble(result.getText());optionvalue = 4;result.setText("");}if(s.equals("=")){d2 = Double.parseDouble(result.getText());switch(optionvalue){case 1:result.setText(String.valueOf(d1+d2));break;case 2:result.setText(String.valueOf(d1-d2));break;case 3:result.setText(String.valueOf(d1*d2));break;case 4:if(d2!=0){result.setText(String.valueOf(d1/d2));}else{result.setText("除数不能为零");return;}break;}operation = "";}if(s.equals("sqrt")){d = Double.parseDouble(result.getText().trim());if(d>=0){result.setText(String.valueOf((Math.sqrt(d))));}else{result.setText("除数不能为零");}}if(s.equals("1/x")){d = Double.parseDouble(result.getText().trim());if(str.equals("0")){result.setText("除数不能为零");}else{result.setText(String.valueOf((1/d)));}}if(s.equals("%")){result.setText(String.valueOf((Double.parseDouble(str)/100))); }if(s.equals("MC")){fm.setText("");dm=0d;newDigital = true;}if(s.equals("MR")){if(fm.getText().trim()!=""){result.setText(""+dm);}}if(s.equals("MS")){dm = Double.parseDouble(result.getText().trim());fm.setText("M");}if(s.equals("M+")){dm = dm+Double.parseDouble(result.getText().trim());}}public static void main (String [] args){ new Calculation();}}。
计算器完整代码(java)
1． Calculator 类import java.applet.*;import java.awt.*;import java.awt.event.*;import ng.*;import java.applet.Applet;import javax.swing.*;import javax.swing.border.*;public class Calculator extends JApplet implements ActionListener {private final String[] KEYS={"7","8","9","/","sqrt", "4","5","6","*","%","1","2","3","-","1/x","0","+/-",".","+","="};private final String[] COMMAND={"Backspace","CE","C"};private final String[] M={" ","MC","MR","MS","M+"};private JButton keys[]=new JButton[KEYS.length];private JButton commands[]=new JButton[COMMAND.length];private JButton m[]=new JButton[M.length];private JTextField display =new JTextField("0");// public JTextField setHorizontalAlignment(int alignment);// private JTextFielddisplay.setHorizontalAlignment(JTextField.RIGHT)=new JTextField("0"); private void setup(){display.setHorizontalAlignment(JTextField.RIGHT);JPanel calckeys=new JPanel();JPanel command=new JPanel();JPanel calms=new JPanel();calckeys.setLayout(new GridLayout(4,5,3,3));command.setLayout(new GridLayout(1,3,3,3));calms.setLayout(new GridLayout(5,1,3,3));for(int i=0;i<KEYS.length;i++){keys[i]=new JButton(KEYS[i]);calckeys.add(keys[i]);keys[i].setForeground(Color.blue);}keys[3].setForeground(Color.red);keys[4].setForeground(Color.red);keys[8].setForeground(Color.red);keys[9].setForeground(Color.red);keys[13].setForeground(Color.red);keys[14].setForeground(Color.red);keys[18].setForeground(Color.red);keys[19].setForeground(Color.red);for(int i=0;i<COMMAND.length;i++){commands[i]=new JButton(COMMAND[i]);command.add(commands[i]);commands[i].setForeground(Color.red);}for(int i=0;i<M.length;i++){m[i]=new JButton(M[i]);calms.add(m[i]);m[i].setForeground(Color.red);}JPanel panel1=new JPanel();panel1.setLayout(new BorderLayout(3,3));panel1.add("North",command);panel1.add("Center",calckeys);JPanel top=new JPanel();top.setLayout(new BorderLayout());display.setBackground(Color.WHITE);top.add("Center",display);getContentPane().setLayout(new BorderLayout(3,5)); getContentPane().add("North",top);getContentPane().add("Center",panel1); getContentPane().add("West",calms);}public void init(){setup();for(int i=0;i<KEYS.length;i++){keys[i].addActionListener(this);}for(int i=0;i<COMMAND.length;i++){commands[i].addActionListener(this);}for(int i=0;i<M.length;i++){m[i].addActionListener(this);}display.setEditable(false);}public void actionPerformed(ActionEvent e){String label=e.getActionCommand();// double zero=e.getActionCommand();if(label=="C")handleC();else if(label=="Backspace")handleBackspace();else if(label=="CE")display.setText("0");else if (label=="1/x")daoShu();else if(label=="sqrt"){display.setText(Math.sqrt(getNumberFromDisplay())+"");}else if("0123456789.".indexOf(label)>=0){handleNumber(label);// handlezero(zero);}elsehandleOperator(label);}private boolean firstDigit=true;private void handleNumber(String key){if(firstDigit){ if(key.equals("0"))display.setText(key);else if(key.equals(".")){display.setText("0.");firstDigit=false;}else if(!key.equals("0")&&!key.equals(".")){display.setText(key);firstDigit=false;}}else if((key.equals("."))&&(display.getText().indexOf(".")<0)) display.setText(display.getText()+".");else if(!key.equals(".")&&display.getText().length()<=32) display.setText(display.getText()+key);}private double number=0;private String operator="=";private void handleOperator(String key){if(operator.equals("/")){if(getNumberFromDisplay()==0){display.setText("除数不能为零");}else{number/=getNumberFromDisplay();}long t1;double t2;t1=(long)number;t2=number-t1;if(t2==0){display.setText(String.valueOf(t1));}else{display.setText(String.valueOf(number));}}else if(operator.equals("+"))number+=getNumberFromDisplay();else if(operator.equals("-"))number-=getNumberFromDisplay();else if(operator.equals("*"))number*=getNumberFromDisplay();else if(operator.equals("%"))number=number/100;else if(operator.equals("+/-"))number=number*(-1);else if(operator.equals("="))number=getNumberFromDisplay();long t1;double t2;t1=(long)number;t2=number-t1;if(t2==0)display.setText(String.valueOf(t1));elsedisplay.setText(String.valueOf(number));operator=key;firstDigit=true;}private double getNumberFromDisplay(){return Double.valueOf(display.getText()).doubleValue(); }private void handleC(){display.setText("0");firstDigit=true;operator="=";}private void handleBackspace(){String text=display.getText();int i=text.length();if(i>0){text=text.substring(0,i-1);if(text.length()==0){display.setText("0");firstDigit=true;operator="=";}elsedisplay.setText(text);}}private void daoShu(){if (display.getText().equals("0")){display.setText("除数不能为零");System.out.println(1);}else{long l;double d=1/getNumberFromDisplay();l=(long)d;System.out.println(d);System.out.println(l);display.setText(String.valueOf(d));}}}2.CalFrame 类import java.awt.Color;importimport java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import javax.swing.JApplet;import javax.swing.JFrame;public class Test {public static void main(String[] args) {JFrame f=new JFrame();f.getAccessibleContext();Calculator Calculator1=new Calculator(); Calculator1.init();f.getContentPane().add("Center",Calculator1);f.setVisible(true);f.setBounds(300, 200,380,245);f.setBackground(Color.LIGHT_GRAY);f.validate();f.setResizable(false);f.addWindowListener(new WindowAdapter(){public void windowClosing(WindowEvent e){System.exit(0);}});f.setTitle("计算器");}}。
Java计算器源代码(已成功运行)汇总
以下为代码：
importjavax.swing.*;
importjava.awt.*;
importjava.awt.event.*;
public class Calculator extends JFrame implements ActionListener
{
private booleandotExist, operated, equaled; //帮助运算的布尔变量
private double storedNumber; //目前的结果private char lastOperator; //表示上一运算符private JTextField operation; //结果栏
private JButton dot, plus, minus, multi, div, sqrt, equal, changePN, clear; //运算符
private JButton[] numbers; //数字
//构造者
public Calculator(
{
setTitle("Calculator";
//初始化变量
dotExist = false; //表示当前的数是否有小数点
operated = false; //表示任意运算符是否被按下equaled = false; //表示等号是否被按下storedNumber = 0;
else if (lastOperator == 's' storedNumber = Math.sqrt(currentNumber; else if (lastOperator == '=' && equaled storedNumber = currentNumber; operation.setText("" + storedNumber; operated = true; lastOperator = operator; } //快捷使用GridBagLayout的方法private void addComponent(GridBagLayout layout, Component component, int row, int col, int width, int height { GridBagConstraints constraints=new GridBagConstraints(; constraints.fill = GridBagConstraints.BOTH; constraints.insets = new Insets(10, 2, 10, 2; constraints.weightx = 100; constraints.weighty = 100; constraints.gridx = col; constraints.gridy = row; constraints.gridwidth = width; constraints.gridheight = height; layout.setConstraints(component, constraints;
用java编写的计算器（Calculator）
用java编写的计算器（Calculator）import java.io.*;import java.awt.*;import java.awt.event.*;import java.util.*;public class Calculator{public static void main(String[] args){new MyfirstCalculator();}}class MyfirstCalculator{Frame f=new Frame("calculator");TextField tf=new T extField(50);ArrayList sa=new ArrayList();//sa用来存储sb中的数据StringBuilder sb=new StringBuilder();//sb用来存储0-9中的数据StringBuilder sb1=new StringBuilder();//用作判断，里面数据为:+,-,*,/四个中的任意一个或多个StringBuilder sb2=new StringBuilder();//用作判断，里面数据为:=MyfirstCalculator(){init();}public void init(){Button b0=new Button("0");Button b1=new Button("1");Button b2=new Button("2");Button b3=new Button("3");Button b4=new Button("4");Button b5=new Button("5");Button b6=new Button("6");Button b7=new Button("7");Button b8=new Button("8");Button b9=new Button("9");Button ba=new Button("=");Button bb=new Button("-");Button bc=new Button("+");Button bd=new Button("*");Button be=new Button("/");//Button bf=new Button("D");//定义一个清空按钮,用来从头开始计数f.add(tf);f.add(b0);f.add(b1);f.add(b2);f.add(b3);f.add(b4);f.add(b5);f.add(b6);f.add(b7);f.add(b8);f.add(b9);f.add(ba);f.add(bb);f.add(bc);f.add(bd);f.add(be);//f.add(bf);f.setBounds(400,400,300,300);f.setVisible(true);f.setLayout(new GridLayout(4,4));//下面的b[0-9]为按钮事件,让点击的按钮数字能够在TextField(tf)中能够显示b0.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){if(sb2.indexOf("=")!=-1){sb.delete(0,sb.length());//在按"="之后在按0-9之间的数字,就清空sb 中的数据,从头开始计数}tf.setText("");sb.append(0);//点击数字按钮，就在sb中加一个数字;tf.setText(sb.toString());//在tf中显示按钮所输入的数字}});b1.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) //下面同b0判断的方法一样{if(sb2.indexOf("=")!=-1){sb.delete(0,sb.length());}tf.setText("");sb.append("1");tf.setText(sb.toString());}});b2.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) //下面同b0判断的方法一样{if(sb2.indexOf("=")!=-1){sb.delete(0,sb.length());}tf.setText("");sb.append("2");tf.setText(sb.toString());}});b3.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) //下面同b0判断的方法一样{if(sb2.indexOf("=")!=-1){sb.delete(0,sb.length());}tf.setText("");sb.append("3");tf.setText(sb.toString());}});b4.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) //下面同b0判断的方法一样{if(sb2.indexOf("=")!=-1){sb.delete(0,sb.length());}tf.setText("");sb.append("4");tf.setText(sb.toString());}});b5.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) //下面同b0判断的方法一样{if(sb2.indexOf("=")!=-1){sb.delete(0,sb.length());}tf.setText("");sb.append("5");tf.setText(sb.toString());}});b6.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) //下面同b0判断的方法一样{if(sb2.indexOf("=")!=-1){sb.delete(0,sb.length());}tf.setText("");sb.append("6");tf.setText(sb.toString());}});b7.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) //下面同b0判断的方法一样{if(sb2.indexOf("=")!=-1){sb.delete(0,sb.length());}tf.setText("");sb.append("7");tf.setText(sb.toString());}});b8.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) //下面同b0判断的方法一样{if(sb2.indexOf("=")!=-1)sb.delete(0,sb.length());}tf.setText("");sb.append("8");tf.setText(sb.toString());}});b9.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) //下面同b0判断的方法一样{if(sb2.indexOf("=")!=-1){sb.delete(0,sb.length());}sb.append("9");tf.setText(sb.toString());}});//bc在此处为"+"事件，调动"-"(bb),"*"(bd),"/"(be)这三个中的其中一个算法bc.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){sa.add(sb.toString());//把sb中的数据即tf(TextField)中显示的数据添加到sa 集合中,用于做加减乘除运算sb.delete(0,sb.length());//清空sb中的缓存,以便于sb存入tf中显示的下一个数字sb1.append("+");//当点击"="按钮,"+"用作加法运算判断的标志sb2.delete(0,sb2.length());//清空sb2中的数据/*//此处为加法运算,--测试代码if(sb1.indexOf("+")!=-1)){int sum=0;for(String s:sa){sum+=Integer.parseInt(s);}//sb1.append("+");System.out.println("+2..."+sum);sa.clear();sa.add(""+sum);System.out.println(sa);tf.setText(""+sum);//sa.add(sb.toString());System.out.println("+..."+sa);sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("+");}*///此处为减法运算if(sb1.indexOf("-")!=-1){int sum=0;int count=0;for(String s:sa){if(count==0){sum=Integer.parseInt(s);//System.out.println(""+sum);--测试代码} else{sum+=-(Integer.parseInt(s));}count++;}//System.out.println("-2..."+sum);--测试代码sa.clear();sa.add(""+sum);//System.out.println(sa);--测试代码tf.setText(""+sum);//System.out.println("-..."+sa);--测试代码sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("+");}//此处为乘法运算if(sb1.indexOf("*")!=-1){int sum=1;for(String s:sa){sum=sum*Integer.parseInt(s);}//System.out.println("*2..."+sum);--测试代码sa.clear();sa.add(""+sum);//System.out.println(sa);--测试代码tf.setText(""+sum);//System.out.println("*..."+sa);--测试代码sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("+");}//此处为除法运算if(sb1.indexOf("/")!=-1){int sum=0;int count=0;for(String s:sa){if(count==0){sum=Integer.parseInt(s);}else{sum/=Integer.parseInt(s);}count++;}//System.out.println("-2..."+sum);--测试代码sa.clear();sa.add(""+sum);//System.out.println(sa);--测试代码tf.setText(""+sum);//System.out.println("/..."+sa);--测试代码sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("+");}}});//ba在此处为"="事件，调动"-"(bb),"+"(ba),"*"(bd),"/"(be),这四个中的其中一个算法ba.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e){if(sa.size()==0)//当sa集合中没有元素,即就没有任何数字用于做加减乘除运算，就中断程序return;if(sb1.indexOf("+")!=-1)//加法运算判断{sa.add(sb.toString());//System.out.println("+1..."+sa);--测试代码int sum=0;for(String s:sa){sum+=Integer.parseInt(s);}//System.out.println(""+sum);--测试代码tf.setText(""+sum);//把算出的结果显示在tf中sa.clear();//清空集合中的元素,以便于做下一个运算sb.delete(0,sb.length());sb.append(""+sum);//当点击"="按钮后,再点击"-","+","*","/"中的任意一个按钮,就要把结果存入到sa集合中,用与下一个数字做运算//sa.append(""+sum);--测试代码sb1.delete(0,sb1.length());sb2.append("=");}if(sb1.indexOf("-")!=-1)//减法运算判断{sa.add(sb.toString());System.out.println("-1..."+sa);int sum=0;int count=0;for(String s:sa){if(count==0){sum=Integer.parseInt(s);//System.out.println(""+sum);--测试代码}else{sum+=-(Integer.parseInt(s));}count++;}//System.out.println(""+sum);--测试代码tf.setText(""+sum);sb.delete(0,sb.length());sb.append(""+sum);sa.clear();sb1.delete(0,sb1.length());sb2.append("=");}if (sb1.indexOf("*")!=-1)//乘法运算判断{ sa.add(sb.toString());//System.out.println("*1..."+sa);int sum=1;for(String s:sa){sum=sum*Integer.parseInt(s);}//System.out.println(""+sum);--测试代码tf.setText(""+sum);sb.delete(0,sb.length());sa.clear();sb.append(""+sum);sb1.delete(0,sb1.length());sb2.append("=");}if(sb1.indexOf("/")!=-1)//除法运算判断{sa.add(sb.toString());System.out.println("/.."+sa);int sum=0;int count=0;for(String s:sa){if(count==0){sum=Integer.parseInt(s);}else{sum/=Integer.parseInt(s);}count++;}//System.out.println(""+sum);--测试代码tf.setText(""+sum);sb.delete(0,sb.length());sa.clear();sb.append(""+sum);sb2.append("=");}sb1.delete(0,sb1.length());}});//bb在此处为"-"事件，调动"+"(bc),"*"(bd),"/"(be)这三个中的其中一个算法bb.addActionListener(new ActionListener() //下面同bc("+")事件判断的方法一样{public void actionPerformed(ActionEvent e){sa.add(sb.toString());System.out.println("-..."+sa);sb.delete(0,sb.length());sb1.append("-");sb2.delete(0,sb2.length());if(sb1.indexOf("+")!=-1){int sum=0;for(String s:sa){sum+=Integer.parseInt(s);}//System.out.println("+2..."+sum);--测试代码sa.clear();sa.add(""+sum);//System.out.println(sa);--测试代码tf.setText(""+sum);//System.out.println("+..."+sa);--测试代码sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("-");}/*--测试代码if(sb1.indexOf("-")!=-1){int sum=0;int count=0;for(String s:sa){if(count==0){sum=Integer.parseInt(s);//System.out.println(""+sum);}else{sum+=-(Integer.parseInt(s));}count++;}sb1.append("-");System.out.println("-2..."+sum);sa.clear();sa.add(""+sum);System.out.println(sa);tf.setText(""+sum);sa.add(sb.toString());System.out.println("*..."+sa);sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("/");}*/if(sb1.indexOf("*")!=-1){int sum=1;for(String s:sa){sum=sum*Integer.parseInt(s);}//System.out.println("*2..."+sum);--测试代码sa.clear(); sa.add(""+sum);//System.out.println(sa);--测试代码tf.setText(""+sum);//System.out.println("*..."+sa);--测试代码sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("-");}if(sb1.indexOf("/")!=-1){int sum=0;int count=0;for(String s:sa){if(count==0){sum=Integer.parseInt(s);}else{sum/=Integer.parseInt(s);}count++;}//System.out.println("-2..."+sum);--测试代码sa.clear();sa.add(""+sum);//System.out.println(sa);--测试代码tf.setText(""+sum);//System.out.println("-..."+sa);--测试代码sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("-");}}});//bd在此处为"*"事件，调动"-"(bb),"+"(bc),"/"(be)这三个中的其中一个算法bd.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) //下面同bc("+")事件判断的方法一样{sa.add(sb.toString());sb.delete(0,sb.length());sb1.append("*");sb2.delete(0,sb2.length());if(sb1.indexOf("+")!=-1){int sum=0;for(String s:sa){sum+=Integer.parseInt(s);}//System.out.println("+2..."+sum);--测试代码sa.clear();sa.add(""+sum);//System.out.println(sa);--测试代码tf.setText(""+sum);//System.out.println("*..."+sa);--测试代码sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("*");}if(sb1.indexOf("-")!=-1){int sum=0;int count=0;for(String s:sa){if(count==0){sum=Integer.parseInt(s);//System.out.println(""+sum);--测试代码} else{sum+=-(Integer.parseInt(s));}count++;}//System.out.println("-2..."+sum);--测试代码sa.clear();sa.add(""+sum);//System.out.println(sa);--测试代码tf.setText(""+sum);//System.out.println("*..."+sa);--测试代码sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("*");}if(sb1.indexOf("/")!=-1){int sum=0;int count=0;for(String s:sa){if(count==0){sum=Integer.parseInt(s);}else{sum/=Integer.parseInt(s);}count++;}//System.out.println("/2..."+sum);--测试代码sa.clear();sa.add(""+sum);//System.out.println(sa);--测试代码tf.setText(""+sum);//System.out.println("*..."+sa);--测试代码sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("*");}/*--测试代码int sum=1;for(String s:sa){sum=sum*Integer.parseInt(s);}sb1.append("*");System.out.println(""+sum);tf.setText(""+sum);*/}//be在此处为"/"事件，调动"-"(bb),"*"(bd),"+"(bc)这三个中的其中一个算法be.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) //下面同bc("+")事件判断的方法一样{sa.add(sb.toString());System.out.println("+.."+sa);sb.delete(0,sb.length());sb1.append("+");//sb2.delete(0,sb2.length());if(sb1.indexOf("+")!=-1){int sum=0;for(String s:sa){sum+=Integer.parseInt(s);}sa.clear();sa.add(""+sum);//System.out.println(sa);--测试代码tf.setText(""+sum);//System.out.println("*..."+sa);--测试代码sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("/");}if(sb1.indexOf("-")!=-1)int sum=0;int count=0;for(String s:sa){if(count==0){sum=Integer.parseInt(s);//System.out.println(""+sum);--测试代码} else{sum+=-(Integer.parseInt(s));}count++;}//System.out.println("-2..."+sum);--测试代码sa.clear();sa.add(""+sum);//System.out.println(sa);--测试代码tf.setText(""+sum);//System.out.println("*..."+sa);--测试代码sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("/");}if(sb1.indexOf("*")!=-1){int sum=1;for(String s:sa){sum=sum*Integer.parseInt(s);}sa.clear();sa.add(""+sum);//System.out.println(sa);--测试代码tf.setText(""+sum);//System.out.println("*..."+sa);--测试代码sb.delete(0,sb.length());sb1.delete(0,sb1.length());sb1.append("/");}/*--测试代码int sum=0;int count=0;for(String s:sa){if(count==0){sum=Integer.parseInt(s);}else{sum/=Integer.parseInt(s);}count++;}System.out.println(""+sum);sb1.append("/");tf.setText(""+sum);*/}});//定义一个清除器事件，清空所用数据用--测试代码/* bf.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {sb.delete(0,sb.length());}});*///关闭窗口f.addWindowListener(new WindowAdapter() {public void windowClosing(WindowEvent e) {System.exit(0);}});}}。
java计算器源代码(仿win7)
java计算器源代码(仿win7)import java.awt.*;import javax.swing.*;import java.awt.event.*;class Cal extends JFrame implements ActionListener,MouseListener{JMenuBar menubar;JMenu menu_check,menu_edit,menu_help;JMenuItem menuitem_science,menuitem_check,menuitem_exit,menuitem_copy,menuitem_paste,menuitem1_copy,menuitem1_paste,menuitem_chelp,menuitem_about;JCheckBoxMenuItem menuitem_standard;JTextField ta1;int x,result2;double op1,op2,opall;private boolean end=false,flag=false,add=false,sub=false,cheng=false,chu=false,flagop2=false;JButton b_mc,b_mr,b_ms,b_mjia,b_mjian,b_tui,b_ce,b_c,b_jj,b_dui,b_7,b_8,b_9,b_chu,b_baifenhao,b_4,b_5,b_6,b_cheng,b_daoshu,b_1,b_2,b_3,b_jian,b_0,b_dian,b_jia,b_dengyu;JPanel p_all,p_button1,p_button2,p_txt,p1,p2,p3,p4,p5;private String str,resultstr;JPopupMenu popupmenu;Container con=this.getContentPane();Font font=new Font("微软雅黑",Font.PLAIN,12);Color color=new Color(120,220,120);Cal(String s){super(s);setSize(220,315);setResizable(false);setVisible(true);Dimension scr=Toolkit.getDefaultToolkit().getScreenSize();Dimension frm=this.getSize();setLocation((scr.width-frm.width)/2,(scr.height-frm.height)/2);Toolkit tk=Toolkit.getDefaultToolkit();//程序默认图标设置setIconImage(tk.createImage("D:\\sd.jpg"));setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//-----------------------------------------------------------------制作框架结构------------------------- //---------------------------------------菜单栏---------------------------menubar=new JMenuBar();menubar.setPreferredSize(new Dimension(frm.width,19));menu_check=new JMenu("查看(V)");menu_check.setFont(font);menu_check.setForeground(Color.black);menuitem_standard=new JCheckBoxMenuItem("标准型",true);menuitem_standard.setFont(font);menuitem_standard.setForeground(Color.black);menuitem_science=new JMenuItem("科学型");menuitem_science.setFont(font);menuitem_science.setForeground(Color.black);menuitem_check=new JMenuItem("查看分组");menuitem_check.setFont(font);menuitem_check.setForeground(Color.black);menuitem_exit=new JMenuItem("退出");menuitem_exit.setFont(font);menuitem_exit.setForeground(Color.black);menuitem_exit.addActionListener(this);menu_check.add(menuitem_standard);menu_check.add(menuitem_science);menu_check.addSeparator();menu_check.add(menuitem_check);menu_check.addSeparator();menu_check.add(menuitem_exit);menubar.add(menu_check);menu_edit=new JMenu("编辑(E)");menu_edit.setFont(font);menu_edit.setForeground(Color.black);menu_edit.setMnemonic(KeyEvent.VK_E);menuitem_copy=new JMenuItem("复制(C) ");menuitem_copy.setFont(font);menuitem_copy.setForeground(Color.black);menuitem_copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_M ASK));menuitem_copy.addActionListener(this);menuitem_paste=new JMenuItem("粘贴(P) ");menuitem_paste.setFont(font);menuitem_paste.setForeground(Color.black);menuitem_paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_M ASK));menuitem_paste.addActionListener(this);menu_edit.add(menuitem_copy);menu_edit.add(menuitem_paste);menubar.add(menu_edit);menu_help=new JMenu("帮助(H)");menu_help.setFont(font);menu_help.setForeground(Color.black);menuitem_chelp=new JMenuItem("查看帮助");menuitem_chelp.setFont(font);menuitem_chelp.setForeground(Color.black);menuitem_about=new JMenuItem("关于计算器");menuitem_about.setFont(font);menuitem_about.setForeground(Color.black);menuitem_about.addActionListener(this);menu_help.add(menuitem_chelp);menu_help.addSeparator();menu_help.add(menuitem_about);menubar.add(menu_help);setJMenuBar(menubar);//--------------------------------------文本框----------------------------------ta1=new JTextField("0");ta1.setFont(new Font("微软雅黑",Font.PLAIN,13));ta1.setEditable(false);//ta1.setOpaque(false);ta1.setHorizontalAlignment(JTextField.RIGHT);ta1.setPreferredSize(new Dimension((frm.width-26),45));ta1.addMouseListener(this);p_all=new JPanel();p_all.setPreferredSize(new Dimension((frm.width-6),250));//p_all.setBackground(color);p_all.setLayout(new FlowLayout(FlowLayout.CENTER,0,3));p_txt=new JPanel();p_txt.setPreferredSize(new Dimension((frm.width-6),53));p_txt.setLayout(new FlowLayout(FlowLayout.CENTER,0,7));p_txt.add(ta1);p_all.add(p_txt);con.add(p_all,BorderLayout.CENTER);//-------------------------------------按钮区----------------------------------p_button1=new JPanel();p_button1.setPreferredSize(new Dimension((frm.width-25),131)); p_button1.setLayout(new FlowLayout(FlowLayout.LEFT,0,3));p_all.add(p_button1);p1=new JPanel();p1.setPreferredSize(new Dimension((frm.width-25),127));p1.setLayout(new GridLayout(4,5,5,6));b_mc=new JButton("MC");b_mc.setFont(new Font("微软雅黑",Font.PLAIN,11));b_mc.setMargin(new Insets(0,0,0,0));b_mc.setForeground(Color.blue);b_mc.addActionListener(this);b_mr=new JButton("MR");b_mr.setFont(new Font("微软雅黑",Font.PLAIN,11));b_mr.setMargin(new Insets(0,0,0,0));b_mr.setForeground(Color.blue);b_mr.addActionListener(this);b_ms=new JButton("MS");b_ms.setFont(new Font("微软雅黑",Font.PLAIN,11));b_ms.setMargin(new Insets(0,0,0,0));b_ms.setForeground(Color.blue);b_ms.addActionListener(this);b_mjia=new JButton("M+");b_mjia.setFont(new Font("微软雅黑",Font.PLAIN,11));b_mjia.setMargin(new Insets(0,0,0,0));b_mjia.setForeground(Color.blue);b_mjia.addActionListener(this);b_mjian=new JButton("M-");b_mjian.setFont(new Font("微软雅黑",Font.PLAIN,11)); b_mjian.setMargin(new Insets(0,0,0,0));b_mjian.setForeground(Color.blue);b_mjian.addActionListener(this);b_tui=new JButton("←");b_tui.setFont(new Font("微软雅黑",Font.BOLD,14));b_tui.setMargin(new Insets(0,0,0,0));b_tui.addActionListener(this);b_tui.setForeground(Color.red);b_ce=new JButton("CE");b_ce.setFont(new Font("微软雅黑",Font.PLAIN,11));b_ce.setMargin(new Insets(0,0,0,0));b_ce.setForeground(Color.red);b_ce.addActionListener(this);b_c=new JButton("C");b_c.setFont(new Font("微软雅黑",Font.PLAIN,11));b_c.setMargin(new Insets(0,0,0,0));b_c.setForeground(Color.red);b_c.addActionListener(this);b_jj=new JButton("±");b_jj.setFont(new Font("微软雅黑",Font.PLAIN,14));b_jj.setMargin(new Insets(0,0,0,0));b_jj.setForeground(Color.red);b_jj.addActionListener(this);b_dui=new JButton("√");b_dui.setFont(new Font("微软雅黑",Font.PLAIN,11)); b_dui.setMargin(new Insets(0,0,0,0));b_dui.setForeground(Color.red);b_dui.addActionListener(this);b_7=new JButton("7");b_7.setFont(new Font("微软雅黑",Font.PLAIN,14));b_7.setMargin(new Insets(0,0,0,0));b_7.setForeground(Color.blue);b_7.setMnemonic(KeyEvent.VK_7);b_7.addActionListener(this);b_8=new JButton("8");b_8.setFont(new Font("微软雅黑",Font.PLAIN,14));b_8.setMargin(new Insets(0,0,0,0));b_8.setForeground(Color.blue);b_8.setMnemonic(KeyEvent.VK_8);b_8.addActionListener(this);b_9=new JButton("9");b_9.setMargin(new Insets(0,0,0,0));b_9.setForeground(Color.blue);b_9.setMnemonic(KeyEvent.VK_9);b_9.addActionListener(this);b_chu=new JButton("/");b_chu.setFont(new Font("微软雅黑",Font.PLAIN,14));b_chu.setMargin(new Insets(0,0,0,0));b_chu.setForeground(Color.red);b_chu.addActionListener(this);b_baifenhao=new JButton("%");b_baifenhao.setFont(new Font("微软雅黑",Font.PLAIN,11)); b_baifenhao.setMargin(new Insets(0,0,0,0));b_baifenhao.setForeground(Color.blue);b_baifenhao.addActionListener(this);b_4=new JButton("4");b_4.setFont(new Font("微软雅黑",Font.PLAIN,14));b_4.setMargin(new Insets(0,0,0,0));b_4.setForeground(Color.blue);b_4.setMnemonic(KeyEvent.VK_4);b_4.addActionListener(this);b_5=new JButton("5");b_5.setFont(new Font("微软雅黑",Font.PLAIN,14));b_5.setMargin(new Insets(0,0,0,0));b_5.setForeground(Color.blue);b_5.setMnemonic(KeyEvent.VK_5);b_5.addActionListener(this);b_6=new JButton("6");b_6.setFont(new Font("微软雅黑",Font.PLAIN,14));b_6.setMargin(new Insets(0,0,0,0));b_6.setForeground(Color.blue);b_6.setMnemonic(KeyEvent.VK_6);b_6.addActionListener(this);b_cheng=new JButton("*");b_cheng.setFont(new Font("微软雅黑",Font.PLAIN,14));b_cheng.setMargin(new Insets(0,0,0,0));b_cheng.setForeground(Color.red);b_cheng.addActionListener(this);b_daoshu=new JButton("1/x");b_daoshu.setFont(new Font("微软雅黑",Font.PLAIN,11)); b_daoshu.setMargin(new Insets(0,0,0,0));b_daoshu.setForeground(Color.blue);b_daoshu.addActionListener(this);b_1=new JButton("1");b_1.setMargin(new Insets(0,0,0,0));b_1.setForeground(Color.blue);b_1.setMnemonic(KeyEvent.VK_1);b_1.addActionListener(this);b_2=new JButton("2");b_2.setFont(new Font("微软雅黑",Font.PLAIN,14)); b_2.setMargin(new Insets(0,0,0,0));b_2.setForeground(Color.blue);b_2.setMnemonic(KeyEvent.VK_2);b_2.addActionListener(this);b_3=new JButton("3");b_3.setFont(new Font("微软雅黑",Font.PLAIN,14)); b_3.setMargin(new Insets(0,0,0,0));b_3.setForeground(Color.blue);b_3.setMnemonic(KeyEvent.VK_3);b_3.addActionListener(this);b_jian=new JButton("-");b_jian.setFont(new Font("微软雅黑",Font.PLAIN,14)); b_jian.setMargin(new Insets(0,0,0,0));b_jian.setForeground(Color.red);b_jian.addActionListener(this);b_0=new JButton("0");b_0.setFont(new Font("微软雅黑",Font.PLAIN,14)); b_0.setMargin(new Insets(0,0,0,0));b_0.setPreferredSize(new Dimension(75,27));b_0.setForeground(Color.blue);b_0.setMnemonic(KeyEvent.VK_0);b_0.addActionListener(this);JLabel L1=new JLabel();L1.setPreferredSize(new Dimension(5,3));b_dian=new JButton(".");b_dian.setFont(new Font("微软雅黑",Font.BOLD,14)); b_dian.setMargin(new Insets(0,0,0,0));b_dian.setPreferredSize(new Dimension(35,27));b_dian.setForeground(Color.blue);b_dian.addActionListener(this);JLabel L2=new JLabel();L2.setPreferredSize(new Dimension(5,3));b_jia=new JButton("+");b_jia.setFont(new Font("微软雅黑",Font.BOLD,14)); b_jia.setMargin(new Insets(0,0,0,0));b_jia.setPreferredSize(new Dimension(35,27));b_jia.setForeground(Color.red);b_jia.addActionListener(this);b_dengyu=new JButton("=");b_dengyu.setFont(new Font("微软雅黑",Font.BOLD,22));b_dengyu.setMargin(new Insets(0,0,0,0));b_dengyu.setPreferredSize(new Dimension(35,60));b_dengyu.setForeground(Color.blue);b_dengyu.addActionListener(this);p1.add(b_mc);p1.add(b_mr);p1.add(b_ms);p1.add(b_mjia);p1.add(b_mjian);p1.add(b_tui);p1.add(b_ce);p1.add(b_c);p1.add(b_jj);p1.add(b_dui);p1.add(b_7);p1.add(b_8);p1.add(b_9);p1.add(b_chu);p1.add(b_baifenhao);p1.add(b_4);p1.add(b_5);p1.add(b_6);p1.add(b_cheng);p1.add(b_daoshu);p_button1.add(p1);p_button2=new JPanel();p_button2.setPreferredSize(new Dimension((frm.width-24),65)); p_button2.setLayout(new FlowLayout(FlowLayout.LEFT,0,0));p_all.add(p_button2);p2=new JPanel();p2.setPreferredSize(new Dimension(156,65));p2.setLayout(new FlowLayout(FlowLayout.LEFT,0,1));p3=new JPanel();p3.setPreferredSize(new Dimension(39,62));p3.setLayout(new FlowLayout(FlowLayout.LEFT,4,0));p_button2.add(p2);p_button2.add(p3);p4=new JPanel();p4.setPreferredSize(new Dimension(156,27));p4.setLayout(new GridLayout(1,4,5,5));p5=new JPanel();p5.setPreferredSize(new Dimension(156,39));p5.setLayout(new FlowLayout(FlowLayout.LEFT,0,5));p2.add(p4);p2.add(p5);p4.add(b_1);p4.add(b_2);p4.add(b_3);p4.add(b_jian);p5.add(b_0);p5.add(L1);p5.add(b_dian);p5.add(L2);p5.add(b_jia);p3.add(b_dengyu);//---------------------------------------快捷菜单对象-------------------------popupmenu=new JPopupMenu(); //快捷菜单对象menuitem1_copy=new JMenuItem("复制");menuitem1_copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_ MASK));menuitem1_copy.addActionListener(this); //监视鼠标右击菜单”复制“popupmenu.add(menuitem1_copy);menuitem1_paste=new JMenuItem("粘贴");menuitem1_paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_MASK));menuitem1_paste.addActionListener(this); //监视鼠标右击菜单”粘贴“popupmenu.add(menuitem1_paste);ta1.add(popupmenu);con.validate();validate();}//---------------------------------------功能区------------------------------------public void actionPerformed(ActionEvent e){if(e.getSource()==menuitem_about){JOptionPane.showMessageDialog(null,"这是一个模仿win7的计算器！欢迎改进，\n创作者：钟作明","仿win7计算器",RMATION_MESSAGE);}if(e.getSource()==menuitem1_copy){ta1.selectAll();ta1.copy();}else if(e.getSource()==menuitem1_paste){ta1.setEditable(true);ta1.setText("");ta1.paste();ta1.setEditable(false);}else if(e.getSource()==menuitem_copy){ta1.selectAll();ta1.copy();}else if(e.getSource()==menuitem_paste){ta1.setEditable(true);ta1.setText("");ta1.paste();ta1.setEditable(false);}else if(e.getSource()==menuitem_exit){System.exit(0);}else if(e.getSource()==b_ce){ta1.setEditable(true);ta1.setText("0");ta1.setEditable(false);}else if(e.getSource()==b_c){ta1.setEditable(true);ta1.setText("0");ta1.setEditable(false);}else if(e.getSource()==b_tui){String str=ta1.getText();StringBuffer s=new StringBuffer(str);int L=s.length();try{if(L!=1){s=s.deleteCharAt(L-1);}else{s=new StringBuffer("0");}}catch(Exception e1){}ta1.setText(String.valueOf(s));}//---------------------------------------------数字键----------------------------- if(e.getSource()==b_1){addString(1);}else if(e.getSource()==b_2){addString(2);}else if(e.getSource()==b_3){addString(3);}else if(e.getSource()==b_4){addString(4);}else if(e.getSource()==b_5){addString(5);}else if(e.getSource()==b_6){addString(6);}else if(e.getSource()==b_7){addString(7);}else if(e.getSource()==b_8){addString(8);}else if(e.getSource()==b_9){addString(9);}else if(e.getSource()==b_0){addString(0);}else if(e.getSource()==b_dian){StringBuffer s1=new StringBuffer(ta1.getText());StringBuffer dian=new StringBuffer(".");if(String.valueOf(s1).indexOf(".")==-1){s1.append(dian);}ta1.setText(String.valueOf(s1));}else if(e.getSource()==b_jj){String txt=ta1.getText();int result=Integer.parseInt(txt);if(txt.indexOf("-")==-1&&txt.length()>0){if(result!=0){txt="-"+txt;}}else{StringBuffer txt1=new StringBuffer(txt);txt1=txt1.deleteCharAt(0);txt=String.valueOf(txt1);}ta1.setText(txt);}else if(e.getSource()==b_dui){str=ta1.getText();Double d=Double.parseDouble(str);if(d>=0){double d1=Math.sqrt(d);String s = String.valueOf(d1);if(s.endsWith(".0")==true){int z=(int)d1;str=String.valueOf(z);}else{str=String.valueOf(d1);}ta1.setText(str);}else{JOptionPane.showMessageDialog(null,"根号底数不能为负数","提醒", RMATION_MESSAGE);}end=true;}else if(e.getSource()==b_baifenhao){str=ta1.getText();Double d=Double.parseDouble(str);ta1.setText(""+d/100);end=true;}else if(e.getSource()==b_daoshu){str=ta1.getText();Double d=Double.parseDouble(str);if(d!=0){ta1.setText(""+1/d);}else{JOptionPane.showMessageDialog(null,"除数不能为零","提醒", RMATION_MESSAGE);}end=true;}else if(e.getSource()==b_jia){str = ta1.getText();op1 = Double.parseDouble(str);end=true;x=0;opall=op1;flagop2=false;}else if(e.getSource()==b_jian){str = ta1.getText();op1 = Double.parseDouble(str);end=true;x=1;opall=op1;flagop2=false;}else if(e.getSource()==b_cheng){str = ta1.getText();op1 = Double.parseDouble(str);end=true;x=2;opall=op1;flagop2=false;}else if(e.getSource()==b_chu){str = ta1.getText();op1 = Double.parseDouble(str);end=true;x=3;opall=op1;flagop2=false;}else if(e.getSource()==b_dengyu){str = ta1.getText();if(flagop2==false){op2 = Double.parseDouble(str);flagop2=true;}switch(x){case 0 :opall=opall+op2;String s=String.valueOf(opall);if(s.endsWith(".0")==true){result2=(int)opall;resultstr=String.valueOf(result2);}else{resultstr=String.valueOf(opall);}ta1.setText(resultstr);break;case 1 :opall=opall-op2;s=String.valueOf(opall);if(s.endsWith(".0")==true){result2=(int)opall;resultstr=String.valueOf(result2);}else{resultstr=String.valueOf(opall);}ta1.setText(resultstr);break;case 2 :opall=opall*op2;s=String.valueOf(opall);if(s.endsWith(".0")==true){result2=(int)opall;resultstr=String.valueOf(result2);}else{resultstr=String.valueOf(opall);}ta1.setText(resultstr);break;case 3 :opall=opall/op2;s=String.valueOf(opall);if(s.endsWith(".0")==true){result2=(int)opall;resultstr=String.valueOf(result2);}else{resultstr=String.valueOf(opall);}ta1.setText(resultstr);break;}end=true;}}public void addString(int num){String s=null;s=String.valueOf(num);//如果end==true;,那么屏幕清空if(end==true){ta1.setText("0");end=false;}if((ta1.getText()).equals("0")){ta1.setText(s);}else{if(ta1.getText().length()<21){str=ta1.getText()+s;ta1.setText(str);}}}public void mouseClicked(MouseEvent mec){if(mec.getModifiers()==mec.BUTTON3_MASK){popupmenu.show(ta1,mec.getX(),mec.getY());}}public void mousePressed(MouseEvent ms){}public void mouseReleased(MouseEvent md){}public void mouseEntered(MouseEvent ms){}public void mouseExited(MouseEvent mex){}public void mouseDragged(MouseEvent med){}}public class Calculator {public static void main(String[] args) {// TODO Auto-generated method stubCal jishuanji=new Cal("计算器");}}。
超级简单明了的JAVA计算器代码
package caculator;import java.awt.Color;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;public class caculator extends JFrame implements ActionListener { double sum=0;static double getValue;static int action ;int i=0,j=0,p=0,l;double par1;JButton Jk=new JButton("k");JButton J1 = new JButton("1");JButton J2 = new JButton("2");JButton J3 = new JButton("3");JButton J4 = new JButton("4");JButton J5 = new JButton("5");JButton J6 = new JButton("6");JButton J7 = new JButton("7");JButton J8 = new JButton("8");JButton J9 = new JButton("9");JButton J0 = new JButton("0");JButton Je = new JButton("=");JButton Ja = new JButton("+");JButton Jr = new JButton("-");JButton Jm = new JButton("*");JButton Jd = new JButton("/");JButton Jc = new JButton("清除");JButton Jpt = new JButton(".");JTextArea show = new JTextArea("");caculator(){super("caculator");setLocation(200,200);setSize(300,350);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true);JPanel jp = new JPanel();jp.setLayout(null);jp.add(J1);jp.add(J2);jp.add(J3);jp.add(J4);jp.add(J5);jp.add(J6);jp.add(J7);jp.add(J8);jp.add(J9);jp.add(J0);jp.add(Je);jp.add(Ja);jp.add(Jr);jp.add(Jm);jp.add(Jd);jp.add(Jc);jp.add(Je);jp.add(Jpt);J9.setBackground(Color.pink); J8.setBackground(Color.pink); J7.setBackground(Color.pink); J6.setBackground(Color.pink); J5.setBackground(Color.pink); J4.setBackground(Color.pink); J3.setBackground(Color.pink); J2.setBackground(Color.pink); J1.setBackground(Color.pink); J0.setBackground(Color.pink);Je.setBackground(Color.pink);Ja.setBackground(Color.pink); Jr.setBackground(Color.pink); Jm.setBackground(Color.pink); Jd.setBackground(Color.pink); Jc.setBackground(Color.pink); Jpt.setBackground(Color.pink);J7.setBounds(10,70,60,50);J8.setBounds(75,70,60,50);J9.setBounds(140,70,60,50); J4.setBounds(10,125,60,50); J5.setBounds(75,125,60,50); J6.setBounds(140,125,60,50); J1.setBounds(10,180,60,50); J2.setBounds(75,180,60,50); J3.setBounds(140,180,60,50); J0.setBounds(10,235,60,50); Je.setBounds(75,235,60,50); Jpt.setBounds(140,235,60,50);Jd.setBounds(205,70,60,50); Jm.setBounds(205,125,60,50); Jr.setBounds(205,180,60,50); Ja.setBounds(205,235,60,50); Jc.setBounds(205,10,60,50);J1.addActionListener(this);J2.addActionListener(this);J3.addActionListener(this);J4.addActionListener(this);J5.addActionListener(this);J6.addActionListener(this);J7.addActionListener(this);J8.addActionListener(this);J9.addActionListener(this);J0.addActionListener(this);Ja.addActionListener(this);Jr.addActionListener(this);Jm.addActionListener(this);Je.addActionListener(this);Jc.addActionListener(this);Jpt.addActionListener(this);jp.add(show);show.setBackground(Color.pink);show.setBounds(10,10,180,50);setContentPane(jp);}@Overridepublic void actionPerformed(ActionEvent e) { if(e.getSource()==J0){show.setText("0"); }if(e.getSource()==J1){show.setText("1");}if(e.getSource()==J2){show.setText("2");}if(e.getSource()==J3){show.setText("3");}if(e.getSource()==J4){show.setText("4");}if(e.getSource()==J5){show.setText("5");}if(e.getSource()==J6){show.setText("6");}if(e.getSource()==J7){show.setText("7");}if(e.getSource()==J8){show.setText("8");}if(e.getSource()==J9){show.setText("9");}par1=Double.parseDouble(show.getText()); if(e.getSource()==Ja){show.setText("");if(j==0){sum=par1;}else if(action==1){sum+=par1;}setsum();j++;p=0;i=0;action = 1;} if(e.getSource()==Jr){show.setText("");if(j==0){sum=par1;}else if(action==2){sum-=par1;}setsum();j++;p=0;i=0;action = 2;}if(e.getSource()==Jm){show.setText(""); if(j==0){sum=par1;}else if(action==3){sum*=par1;}setsum();j++;p=0;i=0;action = 3;}if(e.getSource()==Jd){show.setText(""); if(j==0){sum=par1;}else if(action==4){sum/=par1;}setsum();j++;p=0;i=0;action = 4;if(e.getSource()==Jc){clear();}if(e.getSource()==Jpt){show.append(".");}if(e.getSource()==Je){switch(action){case 1:show.setText(String.valueOf(sum+=par1)); break;case 2:show.setText(String.valueOf(sum-=par1)); break;case 3:show.setText(String.valueOf(sum*=par1)); break;case 4:show.setText(String.valueOf(sum/=par1)); break;}i=0;j=0;action=0;}}private void setsum() {show.setText(String.valueOf(sum));String s=show.getText();}void clear(){i=0;j=0;p=0;sum=0;action=0;show.setText("0"); }// TODO Auto-generated method stubpublic static void main(String args[]){caculator ct=new caculator();}}。
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功能举例：
源程序如下：
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
public class Calucator extends JFrame {
private JTextField tf;
private JPanel panel1, panel2, panel3, panel4;
private JMenuBar myBar;
private JMenu menu1, menu2, menu3;
private JMenuItem editItem1, editItem2, help1, help2, help3;
private JRadioButtonMenuItem seeItem1, seeItem2;###");, new Dot(), ;
addButton(panel2, "+", new Signs(), ;
addButton(panel2, "tan", new Signs(), ;
addButton(panel2, "%", new Signs(), ;
addButton(panel2, "π", numActionListener, ;
addButton(panel2, "e", numActionListener, ;
addButton(panel2, "′″", new Signs(), ;
addButton(panel2, "=", new Signs(), ;
JButton btns = new JButton("计算器"); createLoweredBevelBorder());
false);rim());
(i));
}else if(str == "Backspace"){
if()) > 0){
if().length() > 1){
().substring(0, ().length() - 1));
ength() > 2){
().substring(0, ().length() - 1));
}else{
("0");
IfResult = true;
}
}
}else if(str == "CE"){
("0");
IfResult = true;
}
}
}
/**
*数字输入的事件监听
*/
class Num implements ActionListener{
public void actionPerformed(ActionEvent e) { if(IfResult){
("");
IfResult = false;
}
if(str=="π")
{
);
}
else if(str=="e")
{
);
}
else{
().trim() + str);
if().equals("0")){
("0");
IfResult = true;
flag = true;
}
}
}
}
/**
*小数点的事件监听
*/
class Dot implements ActionListener{
public void actionPerformed(ActionEvent e) { IfResult = false;
if().trim().indexOf(".") == -1){
() + ".");
}
}
}
/**
*main方法
*/
public static void main(String[] args) { new Calucator().setVisible(true);
}
}。