java计算器源码

1、项目1：计算器的设计与实现代码如下：（修改的部分用回色底纹标出）/*- CalculatorWindow -*/import java.awt.*;import java.awt.event.*;import javax.swing.*;/声明下面的JTextField/Area/JButton会用到这个包import javax.swing.border.*;import java.util.LinkedList;/引入泛型包import java.io.*;public class CalculatorWindow extends JFrame implements ActionListe

2、ner NumberButton numberButton; Handlepi handlepi; OperationButton operationButton; JButton 小数点操作,正负号操作,退格操作,等号操作,清零操作,sin,cos,tan,开根号,平方,立方根,acos,asin,atan,立方,阶乘; JTextField resultShow; /下面一大串都是用来声明各个类的新对象，如果这里不声明也可在用的地方声明,显示计算结果 JTextField showComputerProcess;/显示当前计算过程 JTextArea saveComputerProcess

3、; /显示计算步骤 JButton saveButton,copyButton,clearButton; LinkedList list; /链表用来存放第一个运算数、运算符号和第二个运算数 HandleDigit handleDigit; /负责处理ActionEvent事件 HandleDigit1 handleDigit1; HandleOperation handleOperation ; HandleBack handleBack; HandleClear handleClear; HandleEquality handleEquality; HandleDot handleDot;

4、 HandlePOrN handlePOrN; HandleSin handleSin; HandleCos handleCos; HandleTan handleTan; Handlekaigen handlekaigen; Handlelfg handlelfg; Handleacos handleacos; Handleasin handleasin; Handleatan handleatan; Handlepf handlepf; Handlelf handlelf; Handlejch handlejch; /-菜单项声明- JMenuBar menubar; JMenu menu

5、,submenu; JMenuItem jsqj,jsqk,jsqb; public CalculatorWindow() setTitle(计算器);/窗口名 JPanel panelLeft,panelRight; /创建两个轻量级左右容器 list=new LinkedList(); resultShow=new JTextField(10);/文本框的长度 resultShow.setHorizontalAlignment(JTextField.RIGHT);/让标签中的文字内容在标签内按照指定的方式对齐。 resultShow.setForeground(Color.blue);/输

6、入的数字在resultshow中显示的颜色 resultShow.setFont(new Font(宋体,Font.BOLD,30);/说明：宋体，粗体，16号字。 resultShow.setBorder(new SoftBevelBorder(BevelBorder.LOWERED);/设置边框 resultShow.setEditable(false);/控件不能被编辑，如果设为true或者不调用这个函数，则控件可以编辑 resultShow.setBackground(Color.white);/-对当前计算过程区域进行构建- showComputerProcess=new JText

7、Field(); showComputerProcess.setHorizontalAlignment(JTextField.CENTER);/过程区域对其方式 showComputerProcess.setFont(new Font(Arial,Font.BOLD,16); showComputerProcess.setBackground(Color.cyan); showComputerProcess.setEditable(false);/-显示计算步奏区域进行构建-saveComputerProcess=new JTextArea(); saveComputerProcess.set

8、Editable(false); saveComputerProcess.setFont(new Font(宋体,Font.PLAIN,16);/十个数字键生成- numberButton=new NumberButton10;/定义十个按钮数组用来存放按钮的值 handlepi=new Handlepi1; handleDigit=new HandleDigit(list,resultShow,showComputerProcess); for(int i=0;i=9;i+)/循环输出十个按钮 numberButtoni=new NumberButton(i);/对应调用NumberButt

9、on函数 numberButtoni.setFont(new Font(Arial,Font.BOLD,20); numberButtoni.addActionListener(handleDigit);/用addActionListener就可以给这个按钮添加一个监听者，一旦有事件发生（比如鼠标点击），监听者都可以得到这个事件，并可以把事件信息（例如事件源）传给事件处理函数 handleDigit1=new HandleDigit1(list,resultShow,showComputerProcess); handlepi0 =new Handlepi();/对应调用NumberButto

10、n函数 handlepi0.setFont(new Font(Arial,Font.BOLD,20); handlepi0.addActionListener(handleDigit1); /六个操作按钮- operationButton=new OperationButton6; handleOperation=new HandleOperation(list,resultShow, showComputerProcess,saveComputerProcess); String 运算符号=+,-,*,/,%,; /实现在HandleOperation里 for(int i=0;i6;i+)

11、 operationButtoni=new OperationButton(运算符号i); operationButtoni.setFont(new Font(Arial,Font.BOLD,20); operationButtoni.addActionListener(handleOperation); /-其他按钮的效果及功能的实- 小数点操作=new JButton(.); handleDot=new HandleDot(list,resultShow,showComputerProcess); 小数点操作.addActionListener(handleDot); 正负号操作=new

12、JButton(+/-); handlePOrN=new HandlePOrN(list,resultShow,showComputerProcess); 正负号操作.addActionListener(handlePOrN); 等号操作=new JButton(=); handleEquality=new HandleEquality(list,resultShow, showComputerProcess,saveComputerProcess); 等号操作.addActionListener(handleEquality); /-sin的实现- sin=new JButton(sin);

13、 handleSin=new HandleSin(list,resultShow, showComputerProcess,saveComputerProcess); sin.addActionListener(handleSin);/新功能cos的实现- cos=new JButton(cos); handleCos=new HandleCos(list,resultShow, showComputerProcess,saveComputerProcess); cos.addActionListener(handleCos);/tan定义- tan=new JButton(tan); han

14、dleTan=new HandleTan(list,resultShow, showComputerProcess,saveComputerProcess); tan.addActionListener(handleTan);/-反余弦- acos=new JButton(acos); handleacos=new Handleacos(list,resultShow, showComputerProcess,saveComputerProcess); acos.addActionListener(handleacos);/反正玄- asin=new JButton(asin); handle

15、asin=new Handleasin(list,resultShow, showComputerProcess,saveComputerProcess); asin.addActionListener(handleasin);/-反正切- atan=new JButton(atan); handleatan=new Handleatan(list,resultShow, showComputerProcess,saveComputerProcess); atan.addActionListener(handleatan);/-开根号定义- 开根号=new JButton(平方根); hand

16、lekaigen=new Handlekaigen(list,resultShow, showComputerProcess,saveComputerProcess); 开根号.addActionListener(handlekaigen);/-求平方- 平方=new JButton(平方); handlepf=new Handlepf(list,resultShow, showComputerProcess,saveComputerProcess); 平方.addActionListener(handlepf);/-立方根- 立方根=new JButton(立方根); handlelfg=n

17、ew Handlelfg(list,resultShow, showComputerProcess,saveComputerProcess); 立方根.addActionListener(handlelfg);/-立方- 立方=new JButton(立方); handlelf=new Handlelf(list,resultShow, showComputerProcess,saveComputerProcess); 立方.addActionListener(handlelf);/-阶乘- 阶乘=new JButton(X!); handlejch=new Handlejch(list,re

18、sultShow, showComputerProcess,saveComputerProcess); 阶乘.addActionListener(handlejch);/-删除- 退格操作=new JButton(); handleBack=new HandleBack(list,resultShow,showComputerProcess); 退格操作.addActionListener(handleBack);/-清空操作- 清零操作=new JButton(C); handleClear=new HandleClear(list,resultShow,showComputerProces

19、s); 清零操作.addActionListener(handleClear); /-设置他们在窗体中的显示颜色 清零操作.setForeground(Color.red); 退格操作.setForeground(Color.red); 等号操作.setForeground(Color.red); sin.setForeground(Color.blue); cos.setForeground(Color.blue); tan.setForeground(Color.blue); 正负号操作.setForeground(Color.blue); 小数点操作.setForeground(Colo

20、r.blue); 开根号.setForeground(Color.green); 平方.setForeground(Color.green); 立方根.setForeground(Color.green); 立方.setForeground(Color.green); asin.setForeground(Color.orange); acos.setForeground(Color.orange); atan.setForeground(Color.orange); 阶乘.setForeground(Color.magenta); /-菜单实现- menubar=new JMenuBar()

21、; menu=new JMenu(类型选择); submenu=new JMenu(计算器类型); jsqj=new JMenuItem(简单计算器); jsqk=new JMenuItem(科学计算器); jsqb=new JMenuItem(编程计算器); menubar.add(menu); menu.add(submenu); submenu.add(jsqj); submenu.add(jsqk); submenu.add(jsqb); /-左右区域的实现- panelLeft=new JPanel(); panelRight=new JPanel(); panelLeft.setL

22、ayout(new BorderLayout(); JPanel centerInLeft=new JPanel();panelLeft.add(menubar,BorderLayout.BEFORE_FIRST_LINE); panelLeft.add(resultShow,BorderLayout.CENTER); panelLeft.add(centerInLeft,BorderLayout.AFTER_LAST_LINE); centerInLeft.setLayout(new GridLayout(5,6); centerInLeft.add(numberButton1); cent

23、erInLeft.add(numberButton2); centerInLeft.add(numberButton3); centerInLeft.add(operationButton0); centerInLeft.add(numberButton4); centerInLeft.add(numberButton5); centerInLeft.add(numberButton6); centerInLeft.add(operationButton1); centerInLeft.add(numberButton7); centerInLeft.add(numberButton8); c

24、enterInLeft.add(numberButton9); centerInLeft.add(operationButton2); centerInLeft.add(numberButton0); centerInLeft.add(handlepi0); centerInLeft.add(小数点操作); centerInLeft.add(operationButton3); centerInLeft.add(清零操作); centerInLeft.add(退格操作); centerInLeft.add(operationButton4); centerInLeft.add(等号操作); p

25、anelRight.setLayout(new BorderLayout(); panelRight.add(showComputerProcess,BorderLayout.NORTH); saveButton=new JButton(保存); copyButton=new JButton(复制); clearButton=new JButton(清除); saveButton.setToolTipText(保存计算过程到文件); copyButton.setToolTipText(复制选中的计算过程); clearButton.setToolTipText(清除计算过程); saveBut

26、ton.addActionListener(this); copyButton.addActionListener(this); clearButton.addActionListener(this); jsqj.addActionListener(this); jsqk.addActionListener(this); panelRight.add(new JScrollPane(saveComputerProcess),BorderLayout.CENTER); JPanel southInPanelRight=new JPanel(); southInPanelRight.add(sav

27、eButton); southInPanelRight.add(copyButton); southInPanelRight.add(clearButton); panelRight.add(southInPanelRight,BorderLayout.SOUTH); JSplitPane split=new JSplitPane (JSplitPane.HORIZONTAL_SPLIT,panelLeft,panelRight); add(split,BorderLayout.CENTER); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); s

28、etVisible(true);setBounds(100,50,400,350);/setBounds(x,y,width,height); x:组件在容器X轴上的起点 y:组件在容器Y轴上的起点 width:组件的长度 height:组件的 validate();/如果容器中的控件变了，就有需要,让容器对内容控件进行一次布局 public void actionPerformed(ActionEvent e) if(e.getSource()=jsqk) new kxjsq(); this. dispose(); if(e.getSource()=jsqj) new CalculatorW

29、indow(); if(e.getSource()=copyButton) saveComputerProcess.copy(); if(e.getSource()=clearButton) saveComputerProcess.setText(null); if(e.getSource()=saveButton) JFileChooser chooser=new JFileChooser(); int state=chooser.showSaveDialog(null); File file=chooser.getSelectedFile(); if(file!=null&state=JF

30、ileChooser.APPROVE_OPTION) try String content=saveComputerProcess.getText(); StringReader read=new StringReader(content); BufferedReader in= new BufferedReader(read); FileWriter outOne=new FileWriter(file); BufferedWriter out= new BufferedWriter(outOne); String str=null; while(str=in.readLine()!=nul

31、l) out.write(str); out.newLine(); in.close(); out.close(); catch(IOException e1) public static void main(String args) new CalculatorWindow(); /*- Handle16十六进制-*/import java.util.LinkedList;import javax.swing.*;import java.awt.event.*;public class Handle16 implements ActionListener LinkedList list; J

32、TextField resultShow,showComputerProcess; JTextArea saveComputerProcess; Handle16(LinkedList list,JTextField t1,JTextField t2, JTextArea t3) this.list=list; resultShow=t1; showComputerProcess=t2; saveComputerProcess=t3; public void actionPerformed(ActionEvent e) if(list.size()=1|list.size()=2) Strin

33、g numOne=list.getFirst(); try double x=Double.parseDouble(numOne); String result; String s; s=Integer.toHexString(int)x); result=s; String str=String.valueOf(result); list.set(0,str); resultShow.setText(str); String proccess=+numOne+(16)=+result; showComputerProcess.setText(proccess); saveComputerPr

34、ocess.append( +proccess+n); if(list.size()=2) list.removeLast(); /移掉运算符号 catch(Exception ee) else if(list.size()=3) String numTwo=list.getLast(); try double x=Double.parseDouble(numTwo); String result; String s; s=Integer.toHexString(int)x); result=s; String str=String.valueOf(result); list.set(0,st

35、r); resultShow.setText(str); String proccess=+numTwo+(16)=+result; showComputerProcess.setText(proccess); saveComputerProcess.append( +proccess+n); list.removeLast(); /移掉第2个运算数 list.removeLast(); /移掉运算符号 catch(Exception ee) /*- Handle8 八进制-*/import java.util.LinkedList;import javax.swing.*;import ja

36、va.awt.event.*;public class Handle8 implements ActionListener LinkedList list; JTextField resultShow,showComputerProcess; JTextArea saveComputerProcess; Handle8(LinkedList list,JTextField t1,JTextField t2, JTextArea t3) this.list=list; resultShow=t1; showComputerProcess=t2; saveComputerProcess=t3; p

37、ublic void actionPerformed(ActionEvent e) if(list.size()=1|list.size()=2) String numOne=list.getFirst(); try double x=Double.parseDouble(numOne); String result; String s; s=Integer.toOctalString(int)x); result=s; String str=String.valueOf(result); list.set(0,str); resultShow.setText(str); String pro

38、ccess=+numOne+(8)=+result; showComputerProcess.setText(proccess); saveComputerProcess.append( +proccess+n); if(list.size()=2) list.removeLast(); /移掉运算符号 catch(Exception ee) else if(list.size()=3) String numTwo=list.getLast(); try double x=Double.parseDouble(numTwo); String result; String s; s=Intege

39、r.toOctalString(int)x); result=s; String str=String.valueOf(result); list.set(0,str); resultShow.setText(str); String proccess=+numTwo+(8)=+result; showComputerProcess.setText(proccess) saveComputerProcess.append( +proccess+n); list.removeLast(); /移掉第2个运算数 list.removeLast(); /移掉运算符号 catch(Exception

40、ee) /*- Handleacos 同sin-*/*- Handleasin同sin -*/*- Handleatan同sin -*/*- HandleBack -*/import java.util.LinkedList;import javax.swing.*;import java.awt.event.*;public class HandleBack implements ActionListener LinkedList list; JTextField resultShow,showComputerProcess; HandleBack(LinkedList list,JText

41、Field t1,JTextField t2) this.list=list; resultShow=t1; showComputerProcess=t2; public void actionPerformed(ActionEvent e) if(list.size()=1) String num=(String)list.getFirst(); if(num.length()=1) num=num.substring(0,num.length()-1); list.set(0,num); resultShow.setText(num); showComputerProcess.setTex

42、t(+num); else list.removeLast(); resultShow.setText(0); showComputerProcess.setText(0); else if(list.size()=3) String num=(String)list.getLast(); if(num.length()=1) num=num.substring(0,num.length()-1); list.set(2,num); resultShow.setText(num); showComputerProcess.setText(num); else list.removeLast(); result