Java计算器 源代码

Java计算器 源代码：

import java.awt.*; import java.awt.event.*; import javax.swing.*;

/**********************Java计算器 主类*********************/ public class SunnyCalculator implements ActionListener {     JFrame f;     JMenu mEdit;     JMenu mView;     JMenu mHelp;     JMenuItem mCopy;     JMenuItem mPaste;     JTextField tResult;     JButton bNumber;     JButton bOperator;     JButton bOther;     JButton bM;     boolean isDouble=false;//是否为实数     int opFlag=-1;     static double t1=0,t2=0,t3=0,result=0;     static int opflag1=-1,opflag2=-1,flag=0,resflag=1;     int preOp,currentOp=0;//标准位     double op1=0,op2=0;//操作数     double n3;     StringBuffer buf=new StringBuffer(20);     StringBuffer copyBoard=new StringBuffer(20);//剪贴板     StringBuffer memory=new StringBuffer(20);//M系列     StringBuffer str=new StringBuffer();     //Java计算器 构造器     public SunnyCalculator()     {         f = new JFrame("Sunny计算器_杨梅树的盔甲");         Container contentPane = f.getContentPane();         /**************************Java计算器 菜单的创建*****************************/         JMenuBar mBar = new JMenuBar();         mBar.setOpaque(true);         mEdit = new JMenu("编辑(E)");         mEdit.setMnemonic(KeyEvent.VK_E);         mCopy = new JMenuItem("复制(C)");         mEdit.add(mCopy);         mPaste = new JMenuItem("粘贴(P)");         mEdit.add(mPaste);         mView = new JMenu("查看(V)");         mView.setMnemonic(KeyEvent.VK_V);         mView.add(new JMenuItem("标准型"));         mView.add(new JMenuItem("科学型"));         mView.addSeparator();         mView.add(new JMenuItem("查看分组"));         mHelp = new JMenu("帮助(H)");         mHelp.setMnemonic(KeyEvent.VK_H);         mHelp.add(new JMenuItem("帮助主题"));         mHelp.addSeparator();         mHelp.add(new JMenuItem("关于计算器"));         mBar.add(mEdit);         mBar.add(mView);         mBar.add(mHelp);         f.setJMenuBar(mBar);         contentPane.setLayout(new BorderLayout());         JPanel pTop = new JPanel();         tResult = new JTextField("0.",26);         tResult.setHorizontalAlignment(JTextField.RIGHT);         tResult.setEditable(false);         pTop.add(tResult);         contentPane.add(pTop,BorderLayout.NORTH);         JPanel pBottom = new JPanel();         pBottom.setLayout(new BorderLayout());         JPanel pLeft = new JPanel();         pLeft.setLayout(new GridLayout(5,1,3,3));         bM = new JButton(" ");         bM.setEnabled(false);         pLeft.add(bM);

        /*************************Java计算器 功能键定义***************************/         bOther = new JButton("MC");         bOther.addActionListener(this);         bOther.setForeground(Color.red);         bOther.setMargin(new Insets(3,2,3,2));         pLeft.add(bOther);

        bOther = new JButton("MR");         bOther.addActionListener(this);         bOther.setForeground(Color.red);         bOther.setMargin(new Insets(3,2,3,2));         pLeft.add(bOther);

        bOther = new JButton("MS");         bOther.addActionListener(this);         bOther.setForeground(Color.red);         bOther.setMargin(new Insets(3,2,3,2));         pLeft.add(bOther);

        bOther = new JButton("M+");         bOther.addActionListener(this);         bOther.setForeground(Color.red);         bOther.setMargin(new Insets(3,2,3,2));         pLeft.add(bOther);

        pBottom.add(pLeft,BorderLayout.WEST);         JPanel pRight = new JPanel();         pRight.setLayout(new BorderLayout());         JPanel pUp = new JPanel();         pUp.setLayout(new GridLayout(1,3,3,0));

        bOther = new JButton("BackSpace");         bOther.addActionListener(this);         bOther.setForeground(Color.red);         bOther.setMargin(new Insets(3,0,3,5));         pUp.add(bOther);

        bOther = new JButton("CE");         bOther.addActionListener(this);         bOther.setForeground(Color.red);         pUp.add(bOther);

        bOther = new JButton("C");         bOther.addActionListener(this);         bOther.setForeground(Color.red);         pUp.add(bOther);

        /***************************Java计算器 数字键盘区定义**************************/         JPanel pDown = new JPanel();         pDown.setLayout(new GridLayout(4,5,3,2));         bNumber = new JButton("7");         bNumber.setForeground(Color.blue);         bNumber.addActionListener(this);         bNumber.setMargin(new Insets(3,3,3,3));         pDown.add(bNumber);         bNumber = new JButton("8");         bNumber.setForeground(Color.blue);         bNumber.addActionListener(this);         bNumber.setMargin(new Insets(3,3,3,3));         pDown.add(bNumber);         bNumber = new JButton("9");         bNumber.setForeground(Color.blue);         bNumber.addActionListener(this);         bNumber.setMargin(new Insets(3,3,3,3));         pDown.add(bNumber);         bOperator = new JButton("/");         bOperator.setForeground(Color.red);         bOperator.addActionListener(this);         bOperator.setMargin(new Insets(3,0,3,0));         pDown.add(bOperator);         bOperator = new JButton("sqrt");         bOperator.addActionListener(this);         bOperator.setForeground(Color.red);         bOperator.setMargin(new Insets(3,0,3,0));         pDown.add(bOperator);         bNumber = new JButton("4");         bNumber.setForeground(Color.blue);         bNumber.addActionListener(this);         bNumber.setMargin(new Insets(3,3,3,3));         bNumber.setHorizontalTextPosition(JButton.LEFT);         pDown.add(bNumber);         bNumber = new JButton("5");         bNumber.setForeground(Color.blue);         bNumber.addActionListener(this);         bNumber.setMargin(new Insets(3,3,3,3));         pDown.add(bNumber);         bNumber = new JButton("6");         bNumber.setForeground(Color.blue);         bNumber.addActionListener(this);         bNumber.setMargin(new Insets(3,3,3,3));         pDown.add(bNumber);         bOperator = new JButton("*");         bOperator.setForeground(Color.red);         bOperator.addActionListener(this);         bOperator.setMargin(new Insets(3,3,3,3));         pDown.add(bOperator);         bOperator = new JButton("%");         bOperator.setForeground(Color.blue);         bOperator.addActionListener(this);         bOperator.setMargin(new Insets(3,3,3,3));         pDown.add(bOperator);         bNumber = new JButton("1");         bNumber.setForeground(Color.blue);         bNumber.addActionListener(this);         bNumber.setMargin(new Insets(3,3,3,3));         pDown.add(bNumber);         bNumber = new JButton("2");         bNumber.setForeground(Color.blue);         bNumber.addActionListener(this);         bNumber.setMargin(new Insets(3,3,3,3));         pDown.add(bNumber);         bNumber = new JButton("3");         bNumber.setForeground(Color.blue);         bNumber.addActionListener(this);         bNumber.setMargin(new Insets(3,3,3,3));         pDown.add(bNumber);         bOperator = new JButton("-");         bOperator.setForeground(Color.red);         bOperator.addActionListener(this);         bOperator.setMargin(new Insets(3,3,3,3));         pDown.add(bOperator);         bOperator = new JButton("1/x");         bOperator.setForeground(Color.blue);         bOperator.addActionListener(this);         pDown.add(bOperator);         bNumber = new JButton("0");         bNumber.setForeground(Color.blue);         bNumber.addActionListener(this);         bNumber.setMargin(new Insets(3,3,3,3));         pDown.add(bNumber);         bOperator = new JButton("+/-");         bOperator.setForeground(Color.blue);         bOperator.addActionListener(this);         bOperator.setMargin(new Insets(3,3,3,3));         pDown.add(bOperator);         bOperator = new JButton(".");         bOperator.setForeground(Color.blue);         bOperator.addActionListener(this);         bOperator.setMargin(new Insets(3,3,3,3));         pDown.add(bOperator);         bOperator = new JButton("+");         bOperator.setForeground(Color.blue);         bOperator.addActionListener(this);         bOperator.setMargin(new Insets(3,3,3,3));         pDown.add(bOperator);         bOperator = new JButton("=");         bOperator.setForeground(Color.blue);         bOperator.addActionListener(this);         bOperator.setMargin(new Insets(3,3,3,3));         pDown.add(bOperator);         pRight.add(pUp,BorderLayout.NORTH);         pRight.add(pDown,BorderLayout.SOUTH);         pBottom.add(pRight,BorderLayout.EAST);         contentPane.add(pBottom,BorderLayout.SOUTH);         f.setSize(new Dimension(320,256));         f.setResizable(false);         f.setVisible(true);         f.addWindowListener(new WindowAdapter()         {             public void windowClosing(WindowEvent e)             {                 System.exit(0);             }         }         );     }     /************************Java计算器 计算方法区***************************/     public void actionPerformed(ActionEvent e)     {         String s = e.getActionCommand();         if(s.equals("复制(C)"))         {             String temp = tResult.getText().trim();             copyBoard.replace(0, copyBoard.length(), temp);             mPaste.setEnabled(true);         }         else if(s.equals("粘贴(p)"))         {             tResult.setText(copyBoard.toString());         }         else if(s.equals("CE"))         {             //如果是CE则清除文本框             tResult.setText("0.");         }         else if(s.equals("BackSpace"))         {             if(!tResult.getText().trim().equals("0."))             {                 //如果文本框中有内容                 if(str.length()!=1 && str.length()!=0)                 {                     tResult.setText(str.delete(str.length()-1,str.length()).toString());                 }                 else                 {                     tResult.setText("0.");                     str.setLength(0);                 }             }             op2 = Double.parseDouble(tResult.getText().trim());         }         else if(s.equals("C"))         {             //如果是C删除当前计算             tResult.setText("0.");             op1 = op2 = 0;             str.replace(0, str.length(), " ");             preOp = currentOp = 0;         }         else if(s.equals("MC"))         {             //如果是MC则清除缓冲区             String temp = "";             memory.replace(0, memory.length(), temp);             bM.setText(" ");         }         else if(s.equals("MR"))         {             //如果按键为MR则恢复缓冲区的数到文本框             tResult.setText(memory.toString());         }         else if(s.equals("MS"))         {             //如果按键为MS则将文本框的数存入缓冲区             String s1 = tResult.getText().trim();             memory.replace(0, memory.length(), s1);             bM.setText("M");         }         else if(s.equals("M+"))         {             //如果按键为MS则将文本框值与缓冲区的数相加但不显示结果             String temp1 = tResult.getText().trim();             double dtemp = Double.parseDouble(temp1);             String temp2 = memory.toString();             dtemp += Double.parseDouble(temp2);             temp1 = String.valueOf(dtemp);             memory.replace(0, memory.length(), temp1);         }         else if(s.equals("1/x"))         {             //如果按键为1/x则将文本框中的数据为它的倒数             String temp = tResult.getText().trim();             double dtemp = Double.parseDouble(temp);             tResult.setText(""+1/dtemp);         }         else if(s.equals("sqrt"))         {             //如果按键为sqrt则将文本框中的内容求平方根             String temp = tResult.getText().trim();             double dtemp = Double.parseDouble(temp);             tResult.setText(""+Math.sqrt(dtemp));         }         else if(s.equals("+"))         {             str.setLength(0);             if(currentOp==0)             {                 preOp = currentOp = 1;                 op2 = 0;                 tResult.setText(""+op1);             }             else             {                 currentOp = preOp;                 preOp = 1;                 switch(currentOp){                 case 1:                     op1 += op2;                     tResult.setText(""+op1);                     break;                 case 2:                     op1 -= op2;                     tResult.setText(""+op1);                     break;                 case 3:                     op1 *= op2;                     tResult.setText(""+op1);                     break;                 case 4:                     op1 /= op2;                     tResult.setText(""+op1);                     break;                 }             }         }         else if(s.equals("-")){             str.setLength(0);             if(currentOp==0)             {                 preOp=currentOp=2;//op1=op2;op2=0;                 tResult.setText(""+op1);             }             else             {                 currentOp =preOp;                 preOp =2;                 switch(currentOp){ case 1:op1=op1+op2;tResult.setText(""+op1);break; case 2:op1=op1-op2;tResult.setText(""+op1);break; case 3:op1=op1*op2;tResult.setText(""+op1);break; case 4:op1=op1/op2;tResult.setText(""+op1);break;                 }             }         }         else if(s.equals("*"))//*         {             str.setLength(0);             if(currentOp==0)             {                 preOp=currentOp=3;//op1=op2;op2=1;                 tResult.setText(""+op1);//op1=op2;             }             else             {                 currentOp =preOp;                 preOp =3;                 switch(currentOp){ case 1:op1=op1+op2;tResult.setText(""+op1);break; case 2:op1=op1-op2;tResult.setText(""+op1);break; case 3:op1=op1*op2;tResult.setText(""+op1);break; case 4:op1=op1/op2;tResult.setText(""+op1);break;                 }             }         }         else if(s.equals("/"))// /         {             str.setLength(0);             if(currentOp==0)             {                 preOp=currentOp=4;//op2=1;                 tResult.setText(""+op1);//op1=op2;             }             else             {                 currentOp =preOp;                 preOp =4;                 switch(currentOp){ case 1:op1=op1+op2;tResult.setText(""+op1);break; case 2:op1=op1-op2;tResult.setText(""+op1);break; case 3:op1=op1*op2;tResult.setText(""+op1);break; case 4:op1=op1/op2;tResult.setText(""+op1);break;                 }             }         }         else if(s.equals("="))// =         {             if(currentOp==0)             {                 str.setLength(0);                 tResult.setText(""+op2);             }             else             {                 str.setLength(0);                 currentOp =preOp;                 switch(currentOp){ case 1:op1=op1+op2;tResult.setText(""+op1);break; case 2:op1=op1-op2;tResult.setText(""+op1);break; case 3:op1=op1*op2;tResult.setText(""+op1);break; case 4:op1=op1/op2;tResult.setText(""+op1);break;                 }                 currentOp=0;                 op2=0;             }         }         else if(s.equals("."))         {             isDouble=true;             if(tResult.getText().trim().indexOf('.')!=-1);             else {                 if(tResult.getText().trim().equals("0")) {                     str.setLength(0);                     tResult.setText((str.append("0"+s)).toString());                 }                 //else if(tResult.getText().trim().equals("")){}//如果初时显示为空则不做任何操作                 else {                     tResult.setText((str.append(s)).toString());                 }             }         }         else if(s.equals("0"))//如果选择的是"0"这个数字键         {             if(tResult.getText().trim().equals("0.")){}             else{                 tResult.setText(str.append(s).toString());                 op2=Double.parseDouble(tResult.getText().trim());             }         }         else{             tResult.setText(str.append(s).toString());             op2=Double.parseDouble(tResult.getText().trim());             if(currentOp==0)                 op1=op2;         }     }//end actionPerformed     public static void main(String[] args) {         new SunnyCalculator();     } }