java简单计算器源代码

简单计算器代码packagecalcultorthree;importjava.awt.BorderLayout;//导入边界布局管理器类importjava.awt.GridLayout;//导入网格布局管理器类importjava.awt.TextField;//导入文本区域类importjava.awt.event.ActionEvent;//导入事件类importjava.awt.event.ActionListener;//导入事件监听者类importjavax.swing.JButton;//导入按钮类importjavax.swing.JFrame;//导入窗体importjavax.swing.JPanel;//导入面板/***本例实现了简单计算器代码，具备加减乘除和正弦功能，旨在抱砖引玉。熟悉java的同学，可以在此基础上实现更复杂的功能。*@authorFjsh*/publicclassCalcultorThree{//新建对象，在构造函数中进行初始化JFrameframe;//新建窗体对象JButtonbuttonzero,buttondot,buttonequal;//新建按钮“0”“.”“=”JButtonbuttonplus,buttonminus,buttonmultiple,buttondevision,buttonsin,buttontozero;//新建按钮“+”“-”“*”“/”“sin”和归零按钮JButtonbuttonone,buttontwo,buttonthree,buttonfour,buttonfive,buttonsix,buttonseven,buttoneight,buttonnine;//新建数字按钮“0”“1”“2”“3”“4”“5”“6”“7”“8”“9”JPanelpanelwest,panelcenter,paneleast;//新建三个面板TextFieldtf;//新建文本区域对象publicCalcultorThree(){//初始化对象tf=newTextField(30);//构造空文本字段，字符宽度为30frame=newJFrame(CalculatorThree);//构造窗体对象，名称为“CalculatorThree”panelcenter=newJPanel();//构造面板，放到窗体中央panelwest=newJPanel();//构造面板，放到窗体西边paneleast=newJPanel();//构造面板，放到窗体东边Handleh=newHandle();//新建Handle类对象，Handle类为事件监听类//创建数字按钮对象，1、2、3、4、5、6、7、8、9buttonone=newJButton(1);buttontwo=newJButton(2);buttonthree=newJButton(3);buttonfour=newJButton(4);buttonfive=newJButton(5);buttonsix=newJButton(6);buttonseven=newJButton(7);buttoneight=newJButton(8);buttonnine=newJButton(9);panelcenter.setLayout(newGridLayout(3,3));//设置面板布局为网格布局，3行3列//将数字按钮添加到中间面板panelcenter.add(buttonone);panelcenter.add(buttontwo);panelcenter.add(buttonthree);panelcenter.add(buttonfour);panelcenter.add(buttonfive);panelcenter.add(buttonsix);panelcenter.add(buttonseven);panelcenter.add(buttoneight);panelcenter.add(buttonnine);//为10个按钮注册事件监听器buttonone.addActionListener(h);buttontwo.addActionListener(h);buttonthree.addActionListener(h);buttonfour.addActionListener(h);buttonfive.addActionListener(h);buttonsix.addActionListener(h);buttonseven.addActionListener(h);buttoneight.addActionListener(h);buttonnine.addActionListener(h);//构造按钮“0”“.”“=”，注册事件监听器，设置1行3列的布局，添加到到西边的面板buttonzero=newJButton(0);buttondot=newJButton(.);buttonequal=newJButton(=);buttonzero.addActionListener(h);buttondot.addActionListener(h);buttonequal.addActionListener(h);panelwest.setLayout(newGridLayout(3,1));panelwest.add(buttonzero);panelwest.add(buttondot);panelwest.add(buttonequal);//构造操作按钮“+”“-”“*”“/”“sin”“0”，其中“0”为归零按钮buttonplus=newJButton(+);buttonminus=newJButton(-);buttonmultiple=newJButton(*);buttondevision=newJButton(/);buttonsin=newJButton(sin);buttontozero=newJButton(0);paneleast.setLayout(newGridLayout(3,1));//设置西边的布局为3行1列//将操作按钮“+”“-”“*”“/”“sin”“0”添加到西边的面板中paneleast.add(buttonplus);paneleast.add(buttonminus);paneleast.add(buttonmultiple);paneleast.add(buttondevision);paneleast.add(buttonsin);paneleast.add(buttontozero);//为操作按钮“+”“-”“*”“/”“sin”“0”注册监听器buttonplus.addActionListener(h);buttonminus.addActionListener(h);buttonmultiple.addActionListener(h);buttondevision.addActionListener(h);buttonsin.addActionListener(h);buttontozero.addActionListener(h);frame.setLayout(newBorderLayout());//设置窗体为边界布局frame.add(paneleast,East);//将东边面板paneleast添加到窗体的东边frame.add(tf,BorderLayout.NORTH);//将tf文本区域添加到窗体的北边，即顶部frame.add(panelwest,BorderLayout.WEST);//将panelwest面板添加到窗体西边frame.add(panelcenter,BorderLayout.CENTER);//将panelcenter面板添加到窗体中间frame.pack();//设置窗体大小，适合其子组件的首选大小和布局frame.setLocation(500,500);//设置窗体显示位置为（500,500）frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置布局窗体默认关闭方式frame.setVisible(true);//设置窗体可见}publicstaticvoidmain(String[]args){newCalcultorThree();//主方法中新建对象}classHandleimplementsActionListener{//实现动作监听器类intbiaozhi=0;//此标志标志加减乘除操作doubleflag1=0,flag2=0,flag3=0;//flag1、flag2为两个操作数，flag3为结果@OverridepublicvoidactionPerformed(ActionEvente){//方法重写try{//此处可能会产生异常，用try、catch捕捉异常，不用处理if(e.getSource()==buttondot){//小数点tf.setText(0.);}if(e.getSource()==buttontozero){//归零操作tf.setText();}if(e.getSource()==buttonzero){//按键0操作tf.setText(tf.getText()+0);flag1=Double.parseDouble(tf.getText());//将文本区域转换成Double类型，赋给flag1}if(e.getSource()==buttonone){//按键1操作tf.setText(tf.getText()+1);flag1=Double.parseDouble(tf.getText());}elseif(e.getSource()==buttontwo){//按键2操作tf.setText(tf.getText()+2);flag1=Double.parseDouble(tf.getText());}elseif(e.getSource()==buttonthree){//按键3操作tf.setText(tf.getText()+3);flag1=Double.parseDouble(tf.getText());}elseif(e.getSource()==buttonfour){//按键4操作tf.setText(tf.getText()+4);flag1=Double.parseDouble(tf.getText());}elseif(e.getSource()==buttonfive){//按键5操作tf.setText(tf.getText()+5);flag1=Double.parseDouble(tf.getText());}elseif(e.getSource()==buttonsix){//按键6操作tf.setText(tf.getText()+6);flag1=Double.parseDouble(tf.getText());}elseif(e.getSource()==buttonseven){//按键7操作tf.setText(tf.getText()+7);flag1=Double.parseDouble(tf.getText());}elseif(e.getSource()==buttoneight){//按键8操作tf.setText(tf.getText()+8);flag1=Double.parseDouble(tf.getText());}elseif(e.getSource()==buttonnine){//按键9操作tf.setText(tf.getText()+9);flag1=Double.parseDouble(tf.getText());}if(e.getSource()==butto