JAVA模拟科学计算器

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class Ca extends JFrame implements ActionListener

{

//*********************************************************************** //标准型计算器控件键钮

static JFrame f1 = new JFrame("计算器");

private String KEYS[] = {"7","8","9","/","sqrt","4","5","6","*","%",

"1","2","3","-","1/x","0","+/-",".","+","="};

private String M[] = {" ","MC","MR","MS","M+"};

private String COM[] = {"Backspace","CE","C"};

private JButton keys[] = new JButton[KEYS.length];

private JButton com[] = new JButton[COM.length];

private JButton m[] = new JButton[M.length];

private JTextField result,hh,jj;

MenuBar menubar1=new MenuBar();

Menu edit=new Menu("编辑(E)"),

view=new Menu("查看(V)"),

help=new Menu("帮助(H)");

MenuItem copy=new MenuItem("复制(C)"),

paste=new MenuItem("粘贴(P)"),

standar=new MenuItem("标准型(T)"),

science=new MenuItem("科学型(S)"),

numgroup=new MenuItem("数字分组(I)"),

helpt=new MenuItem("帮助主题(H)"),

about=new MenuItem("关于计算器(A)");

private boolean firstDigit = true; //判断第一个输入的字符是否是数字

private double resultNum = 0.0,resultNum2 = 0.0; //中间结果

private String operator = "=",co,str,operator2 = "=";

private boolean operateValidFlag = true;

//*********************************************************************** //科学性计算器控件及按钮

static JFrame f2 = new JFrame("科学计算器");

private JTextField result2;

private String[] KON = {"sta","F-E","(",")","MC","Ave","dms","Exp",

"In","MR","Sum","sin","x^y","log","MS","s","cos","x^3","n!",

"M+","Dat","tan","x^2","1/x","pi"};

private String[] KO = {"7","8","9","/","Mod","And",

"4","5","6","*","Or","Xor",

"1","2","3","-","Lsh","Not",

"0","+/-",".","+","=","Int",

"A","B","C","D","E","F"};

private String ITM[]={"标准型","科学型","十六进制数(H) F5","十进制(D) F6",

"八进制(O) F7","二进制(B) F8","四字(Q) F12","DWORD 值(R)F2","单字(W)F3","字节(Y) F4"

,"数字分组(I)"};

private final String[] COMM = {"Backspace","CE","C"};

private JButton comm[] = new JButton[COMM.length];

private JButton kon[] = new JButton[KON.length];

private JButton ko[] = new JButton[KO.length];

private MenuItem itm[] = new MenuItem[ITM.length];

private JPanel panel0,panel1,panel2,panel3,panel4,panel5,panel6;

Checkbox checkbox1,checkbox2,checkbox3,checkbox4;

MenuBar menubar2=new MenuBar(); //添加菜单条

Menu edit2=new Menu("编辑(E)"),

view2=new Menu("查看(V)"),

help2=new Menu("帮助(H)");

MenuItem copy2=new MenuItem("复制(C) Ctrl+C"),

past2=new MenuItem("粘贴(P) Ctrl+V"),

standar2=new MenuItem("标准型(T)"),

science2=new MenuItem("科学型(S)"),

numgroup2=new MenuItem("数字分组(I)"),

menuitem1=new MenuItem("十六进制数(H) F5"),

menuitem2=new MenuItem("十进制(D) F6"),

menuitem3=new MenuItem("八进制(O) F7"),

menuitem4=new MenuItem("二进制(B) F8"),

menuitem5=new MenuItem("四字(Q) F12"),

menuitem6=new MenuItem("DWORD 值(R)F2"),

menuitem7=new MenuItem("单字(W)F3"),

menuitem8=new MenuItem("字节(Y) F4"),

helpt2=new MenuItem("帮助主题(H)"),

about2=new MenuItem("关于计算器(A)");

//*********************************************************************** //构造函数

public Ca()

{

//标准型开始初始化********************

result = new JTextField("0.");

result.setHorizontalAlignment(JTextField.RIGHT); //文字右对齐

result.setEditable(false); //设置为不可编辑

result.setBackground(Color.WHITE); //设置颜色为白色

JPanel k0 = new JPanel();

k0.setLayout(new GridLayout(4,5,5,5));

for(int i = 0;i < KEYS.length;i++)

{

keys[i] = new JButton(KEYS[i]);

k0.add(keys[i]);

keys[i].setForeground(Color.blue);

}

keys[3].setForeground(Color.red);

keys[8].setForeground(Color.red);

keys[13].setForeground(Color.red);

keys[18].setForeground(Color.red);

keys[19].setForeground(Color.red);

JPanel c0 = new JPanel();

c0.setLayout(new GridLayout(1,3,5,5));

for(int i = 0;i < COM.length;i++)

{

com[i] = new JButton(COM[i]);

c0.add(com[i]);

com[i].setForeground(Color.red);

}

JPanel m0 = new JPanel();

m0.setLayout(new GridLayout(5,1,5,5));

for(int i = 0;i < M.length;i++)

{

m[i] = new JButton(M[i]);

m0.add(m[i]);

m[i].setForeground(Color.red);

}

m[0].setForeground(Color.black);

//f1的监视器

for(int i = 0;i < KEYS.length;i++)

{

keys[i].addActionListener(this);

}

for(int i = 0;i < COM.length;i++)

{

com[i].addActionListener(this);

}

for(int i = 0;i < M.length;i++)

{

m[i].addActionListener(this);

}

//复制事件

copy.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

int count;

count=str.length();

if(count!=0)

co=result.getText();

else

System.out.println("没有可复制的对象");

}

});

//粘贴事件

paste.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

str=co;

result.setText(str);

}

});

//复制事件

copy2.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

int count;

count=str.length();

if(count!=0)

co=result2.getText();

else

System.out.println("没有可复制的对象");

}

});

//粘贴事件

past2.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

str=co;

result2.setText(str);

}

});

edit.add(copy);

edit.add(paste);

view.add(standar);

view.add(science);

view.addSeparator();

view.add(numgroup);

help.add(helpt);

help.addSeparator();

help.add(about);

menubar1.add(edit);

menubar1.add(view);

menubar1.add(help);

//整体布局

JPanel p1 = new JPanel();

p1.setLayout(new BorderLayout());

p1.add("North",c0);

p1.add("Center",k0);

JPanel p2 = new JPanel();

p2.setLayout(new BorderLayout());

p2.add("Center",result);

f1.setLayout(new BorderLayout(3,5));

f1.add("North",p2);

f1.add("Center",p1);

f1.add("West",m0);

f1.setBackground(Color.LIGHT_GRAY);

f1.setLocation(200,200);

f1.setMenuBar(menubar1);

f1.setVisible(true);

f1.setResizable(false);//不可最大化

f1.pack(); //紧凑

f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//标准型初始化结束

//**************************************************** standar2.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

f1.setVisible(true);

f2.setVisible(false); //按钮不可操作

}});

science.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

f1.setVisible(false);

f2.setVisible(true); //按钮不可操作

}});

//****************************************************

//科学性初始化开始

panel0=new JPanel();

panel1=new JPanel();

panel2=new JPanel();

panel3=new JPanel();

panel4=new JPanel();

panel5=new JPanel();

panel6=new JPanel();

panel0.setLayout(new GridLayout(1,4)); //设置网格型布局管理器panel1.setLayout(new GridLayout(1,3,30,0));

panel2.setLayout(new GridLayout(1,2));

panel3.setLayout(new GridLayout(1,3,5,0));

panel4.setLayout(new GridLayout(5,5,5,5));

panel5.setLayout(new GridLayout(5,6,5,5));

panel6.setLayout(new FlowLayout(FlowLayout.LEFT)); //按钮左对齐result2 = new JTextField("0.",100);

result2.setHorizontalAlignment(JTextField.RIGHT); //文字右对齐result2.setEditable(false); //设置为文本不可编辑result2.setBackground(Color.WHITE); //设置文本框颜色为白色

CheckboxGroup cbg1=new CheckboxGroup();

checkbox1=new Checkbox("十六进制",false,cbg1);

checkbox2=new Checkbox("十进制",true,cbg1);

checkbox3=new Checkbox("八进制",false,cbg1);

checkbox4=new Checkbox("二进制",false,cbg1);

panel0.add(checkbox1);

panel0.add(checkbox2);

panel0.add(checkbox3);

panel0.add(checkbox4);

CheckboxGroup cbg2=new CheckboxGroup();

panel1.add(new Checkbox("角度",true,cbg2));

panel1.add(new Checkbox("弧度",false,cbg2));

panel1.add(new Checkbox("梯度",false,cbg2));

JLabel HH = new JLabel(" ");

panel2.add(new Checkbox("Inv",false));

panel2.add(new Checkbox("Hyp",false));

hh = new JTextField();

jj = new JTextField();

hh.setText(" ");

hh.setEditable(false);

jj.setText(" ");

jj.setEditable(false);

panel2.add(hh);panel2.add(HH);panel2.add(jj);

panel6.add(result2);

edit2.add(copy2);

edit2.add(past2);

view2.add(standar2);

view2.add(science2);

view2.addSeparator();

view2.add(menuitem1);

view2.add(menuitem2);

view2.add(menuitem3);

view2.add(menuitem4);

view2.addSeparator();

view2.add(menuitem5);

view2.add(menuitem6);

view2.add(menuitem7);

view2.add(menuitem8);

view2.addSeparator();

view2.add(numgroup2);

help2.add(helpt2);

help2.addSeparator();

help2.add(about2);

menubar2.add(edit2);

menubar2.add(view2);

menubar2.add(help2);

for(int i = 0;i < COMM.length;i++)

{

comm[i] = new JButton(COMM[i]);

panel3.add(comm[i]);

comm[i].setForeground(Color.red); }

for(int i = 0;i < KON.length;i++)

{

kon[i] = new JButton(KON[i]);

panel4.add(kon[i]);

kon[i].setForeground(Color.magenta); }

kon[4].setForeground(Color.red);

kon[9].setForeground(Color.red);

kon[14].setForeground(Color.red);

kon[19].setForeground(Color.red);

kon[0].setForeground(Color.blue);

kon[24].setForeground(Color.blue);

kon[5].setForeground(Color.blue);

kon[10].setForeground(Color.blue);

kon[15].setForeground(Color.blue);

kon[20].setForeground(Color.blue);

for(int i = 0;i < KO.length;i++)

{

ko[i] = new JButton(KO[i]);

panel5.add(ko[i]);

ko[i].setForeground(Color.red);

}

ko[0].setForeground(Color.blue);

ko[1].setForeground(Color.blue);

ko[2].setForeground(Color.blue);

ko[6].setForeground(Color.blue);

ko[7].setForeground(Color.blue);

ko[8].setForeground(Color.blue);

ko[12].setForeground(Color.blue);

ko[13].setForeground(Color.blue);

ko[14].setForeground(Color.blue);

ko[18].setForeground(Color.blue);

ko[19].setForeground(Color.blue);

ko[20].setForeground(Color.blue);

//添加监视器

for(int i = 0;i < KON.length;i++)

{

kon[i].addActionListener(new ca2Actionlistener()); }

for(int i = 0;i < KO.length;i++)

{

ko[i].addActionListener(new ca2Actionlistener());

}

for(int i = 0;i < COMM.length;i++)

{

comm[i].addActionListener(new ca2Actionlistener()); }

checkbox1.addItemListener(new itemListener()); checkbox2.addItemListener(new itemListener()); checkbox3.addItemListener(new itemListener()); checkbox4.addItemListener(new itemListener());

JPanel pp1 = new JPanel();

pp1.setLayout(new GridLayout(3,1));

pp1.add(panel6);

JPanel pp2 = new JPanel();

pp2.setLayout(new FlowLayout(FlowLayout.LEFT));

pp2.add(panel0);

pp2.add(new JLabel(" "));

pp2.add(panel1);

pp1.add(pp2);

JPanel pp3 = new JPanel();

pp3.setLayout(new FlowLayout(FlowLayout.LEFT));

pp3.add(panel2);

pp3.add(new JLabel(" "));

pp3.add(panel3);

pp1.add(pp3);

JPanel pp4 = new JPanel();

pp4.setLayout(new FlowLayout(FlowLayout.LEFT));

JLabel NN = new JLabel(" ");

f2.setLayout(new GridLayout(2,1));

f2.add(pp1);

pp4.add(panel4);

pp4.add(NN);

pp4.add(panel5);

f2.add(pp4);

f2.setBackground(Color.LIGHT_GRAY);

f2.setSize(655,340);

f2.setLocation(200,200);

f2.setMenuBar(menubar2);

f2.setVisible(false);

f2.setResizable(false);

f2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

//科学型初始化结束

//****************************************************

//标准型监听器

public void actionPerformed(ActionEvent e)

{

String label = e.getActionCommand();//获取事件源的标签

if(label.equals(COM[0]))//按Backspace

handleBS();

else if(label.equals(COM[1]))//按CE

result.setText("0");

else if(label.equals(COM[2]))//按C

handleC();

else if(label.equals(M[1]))//按MC

handleMC();

else if(label.equals(M[2]))//按MR

handleMR();

else if(label.equals(M[3]))//按MS

handleMS();

else if(label.equals(M[4]))//按M+

handleM();

else if("0123456789.".indexOf(label) >= 0)//按数字键或者小数点handleNB(label);

else//按运算符

handleOR(label);

}

private void handleBS()//处理Backspace

{

String text = new String(result.getText());

int j = text.length();

if(j > 0)

{

text = text.substring(0,j - 1);

if(text.length() == 0)

{

result.setText("0");

firstDigit = true;

operator = "=";

}

else

{

result.setText(text);

}

}

}

private void handleNB(String key)//处理数字键

{

if(firstDigit)

{

result.setText(key);

}

else if((key.equals("."))&&(result.getText().indexOf(".")<0))

{

result.setText(result.getText() + ".");

}

else if(!key.equals("."))

{

result.setText(result.getText() + key);

}

firstDigit = false;

}

private void handleC()//处理C

{

result.setText("0");

firstDigit = true;

operator = "=";

}

private void handleOR(String key)//处理运算符

{

if(operator.equals("/"))

{

if(getNumberFromText() == 0.0)

{

operateValidFlag = false;

result.setText("除数不能是零");

}

else

resultNum /= getNumberFromText();

}

else if(operator.equals("1/x"))

{

if(resultNum == 0.0)

{

operateValidFlag = false;

result.setText("零没有倒数");

}

else

resultNum = 1 / resultNum;

}

else if(operator.equals("+"))

resultNum += getNumberFromText();

else if(operator.equals("-"))

resultNum -= getNumberFromText();

else if(operator.equals("*"))

resultNum *= getNumberFromText();

else if(operator.equals("sqrt"))

resultNum = Math.sqrt(resultNum);///////// else if(operator.equals("%"))

resultNum = resultNum / 100;

else if(operator.equals("+/-"))

resultNum = resultNum * (-1);

else if(operator.equals("="))

{ resultNum = getNumberFromText();}

if(operateValidFlag)// 双精度浮点数的运算

{

long t1;

double t2;

t1 = (long) resultNum;

t2 = resultNum - t1;

if(t2 == 0 )

{

result.setText(String.valueOf(t1));

}

else

{

result.setText(String.valueOf(resultNum));

}

}

//运算符等于用户按的按钮

operator = key;

firstDigit = true;

operateValidFlag = true;

}

public void handleMC()//处理MC，清除内存

{

resultNum = 0.0;

result.setText("0");

m[0].setText(" ");

firstDigit = true;

operator = "=";

}

public void handleMR()//处理MR，重新调用存储的数据

{

if(result.getText() != "" )//有记忆数字

{

result.setText("" + resultNum);

}

}

public void handleMS()//处理MS，存储显示的数据

{

resultNum = Double.valueOf(result.getText()).doubleValue();

m[0].setText("M");

result.setText("0");

firstDigit = true;

operator = "=";

}

public void handleM()//处理M+，将显示的数字与已经存储的数据相加要查看新的数字单击MR

{

resultNum = resultNum + Double.valueOf(result.getText()).doubleValue();

}

//标准型监听器定义部分结束

//****************************************************

//科学性监听器定义

class itemListener implements ItemListener

{

public void itemStateChanged(ItemEvent e)

{

Checkbox cb=(Checkbox)e.getItemSelectable(); //获取事件源的

resetable(); //使按钮重新可用

if(cb.getLabel().equals( "十六进制"))

{

kon[1].setEnabled(false);

kon[5].setEnabled(false);

kon[6].setEnabled(false);

kon[7].setEnabled(false);

kon[10].setEnabled(false);

kon[11].setEnabled(false);

kon[15].setEnabled(false);

kon[16].setEnabled(false);

kon[20].setEnabled(false);

kon[21].setEnabled(false);

kon[24].setEnabled(false);

kon[1].setForeground(Color.gray);

kon[5].setForeground(Color.gray);

kon[6].setForeground(Color.gray);

kon[7].setForeground(Color.gray);

kon[10].setForeground(Color.gray);

kon[11].setForeground(Color.gray);

kon[15].setForeground(Color.gray);

kon[16].setForeground(Color.gray);

kon[20].setForeground(Color.gray);

kon[21].setForeground(Color.gray);

ko[1].setForeground(Color.blue);

ko[2].setForeground(Color.blue);

ko[24].setForeground(Color.blue);

ko[25].setForeground(Color.blue);

ko[26].setForeground(Color.blue);

ko[27].setForeground(Color.blue);

ko[28].setForeground(Color.blue);

ko[29].setForeground(Color.blue);

ko[0].setForeground(Color.blue);

ko[6].setForeground(Color.blue);

ko[7].setForeground(Color.blue);

ko[8].setForeground(Color.blue);

ko[13].setForeground(Color.blue);

ko[14].setForeground(Color.blue); }

else if(cb.getLabel().equals( "十进制")) {

kon[5].setEnabled(false);

kon[10].setEnabled(false);

kon[15].setEnabled(false);

kon[20].setEnabled(false);

ko[24].setEnabled(false);

ko[25].setEnabled(false);

ko[26].setEnabled(false);

ko[27].setEnabled(false);

ko[28].setEnabled(false);

ko[29].setEnabled(false);

kon[5].setForeground(Color.gray); kon[10].setForeground(Color.gray); kon[15].setForeground(Color.gray); kon[20].setForeground(Color.gray); ko[24].setForeground(Color.gray);

ko[25].setForeground(Color.gray);

ko[26].setForeground(Color.gray);

ko[27].setForeground(Color.gray);

ko[28].setForeground(Color.gray);

ko[29].setForeground(Color.gray);

ko[1].setForeground(Color.blue);

ko[2].setForeground(Color.blue);

kon[1].setForeground(Color.magenta);

kon[7].setForeground(Color.magenta); kon[11].setForeground(Color.magenta); kon[16].setForeground(Color.magenta); kon[21].setForeground(Color.magenta); kon[24].setForeground(Color.blue);

ko[0].setForeground(Color.blue);

ko[6].setForeground(Color.blue);

ko[7].setForeground(Color.blue);

ko[8].setForeground(Color.blue);

ko[13].setForeground(Color.blue);

ko[14].setForeground(Color.blue);

}

else if(cb.getLabel().equals( "八进制")) {

kon[1].setEnabled(false);

kon[5].setEnabled(false);

kon[6].setEnabled(false);

kon[7].setEnabled(false);

kon[10].setEnabled(false);

kon[11].setEnabled(false);

kon[15].setEnabled(false);

kon[16].setEnabled(false);

kon[20].setEnabled(false);

kon[21].setEnabled(false);

kon[24].setEnabled(false);

ko[1].setEnabled(false);

ko[2].setEnabled(false);

ko[24].setEnabled(false);

ko[25].setEnabled(false);

ko[26].setEnabled(false);

ko[27].setEnabled(false);

ko[28].setEnabled(false);

ko[29].setEnabled(false);

kon[1].setForeground(Color.gray);

kon[5].setForeground(Color.gray);

kon[6].setForeground(Color.gray);

kon[7].setForeground(Color.gray);

kon[10].setForeground(Color.gray);

kon[11].setForeground(Color.gray);

kon[15].setForeground(Color.gray);

kon[16].setForeground(Color.gray);

kon[20].setForeground(Color.gray);

kon[24].setForeground(Color.gray);

ko[1].setForeground(Color.gray);

ko[2].setForeground(Color.gray);

ko[24].setForeground(Color.gray);

ko[25].setForeground(Color.gray);

ko[26].setForeground(Color.gray);

ko[27].setForeground(Color.gray);

ko[28].setForeground(Color.gray);

ko[29].setForeground(Color.gray);

ko[0].setForeground(Color.blue);

ko[6].setForeground(Color.blue);

ko[7].setForeground(Color.blue);

ko[8].setForeground(Color.blue);

ko[13].setForeground(Color.blue);

ko[14].setForeground(Color.blue); }

else if(cb.getLabel().equals( "二进制")) {

kon[1].setEnabled(false);

kon[5].setEnabled(false);

kon[6].setEnabled(false);

kon[7].setEnabled(false);

kon[10].setEnabled(false);

kon[11].setEnabled(false);

kon[15].setEnabled(false);

kon[16].setEnabled(false);

kon[20].setEnabled(false);

kon[21].setEnabled(false);

kon[24].setEnabled(false);

ko[1].setEnabled(false);

ko[2].setEnabled(false);

ko[24].setEnabled(false);

ko[25].setEnabled(false);

ko[26].setEnabled(false);

ko[27].setEnabled(false);

ko[28].setEnabled(false);

ko[29].setEnabled(false);

ko[0].setEnabled(false);

ko[6].setEnabled(false);

ko[7].setEnabled(false);

ko[8].setEnabled(false);

ko[13].setEnabled(false);

ko[14].setEnabled(false);

kon[1].setForeground(Color.gray);

kon[5].setForeground(Color.gray);

kon[6].setForeground(Color.gray);

kon[7].setForeground(Color.gray);

kon[10].setForeground(Color.gray);

kon[11].setForeground(Color.gray);

kon[15].setForeground(Color.gray);

kon[16].setForeground(Color.gray);

kon[20].setForeground(Color.gray);

kon[21].setForeground(Color.gray);

kon[24].setForeground(Color.gray);

ko[1].setForeground(Color.gray);

ko[2].setForeground(Color.gray);

ko[24].setForeground(Color.gray);

ko[25].setForeground(Color.gray);

ko[26].setForeground(Color.gray);

ko[27].setForeground(Color.gray);

ko[28].setForeground(Color.gray);

ko[29].setForeground(Color.gray);

ko[0].setForeground(Color.gray);

ko[6].setForeground(Color.gray);

ko[7].setForeground(Color.gray);

ko[8].setForeground(Color.gray);

ko[13].setForeground(Color.gray);

ko[14].setForeground(Color.gray);

}

}

}

class ca2Actionlistener implements ActionListener

{

public void actionPerformed(ActionEvent e)

{

String label2 = e.getActionCommand();//获取事件源的标签

if(label2.equals(COMM[0]))//按Backspace

handleBS2();

else if(label2.equals(COMM[1]))//按CE

result2.setText("0");

else if(label2.equals(COMM[2]))//按C

handleC2();

else if(label2.equals(KON[4]))//按MC

handleMC2();

else if(label2.equals(KON[9]))//按MR

handleMR2();

else if(label2.equals(KON[14]))//按MS

handleMS2();

else if(label2.equals(KON[19]))//按M+

handleM2();

else if(label2.equals(KON[11]))//按sin

handleSI();

else if(label2.equals(KON[12])) //按x^y

handleYT();

else if(label2.equals(KON[13])) //按log

handleLO();

else if(label2.equals(KON[16])) //按cos

handleCO();

else if(label2.equals(KON[17])) //按x^3

handleTT();

else if(label2.equals(KON[22])) //按x^2

handlePF();

else if(label2.equals(KON[18])) //按n!

handleJC();

else if(label2.equals(KON[21])) //按tan

handleTA();

else if(label2.equals(KON[24]))//按pi

result2.setText(""+3.141592653);

else if("0123456789.".indexOf(label2) >= 0)//按数字键或者小数点handleNB2(label2);

else//按运算符

handleOR2(label2);

}

}

//科学性监听器定义结束

//****************************************************

//科学性计算器用到的函数

void resetable() //使按钮重新可用

{

for(int i=0;i

kon[i].setEnabled(true);

for(int i=0;i

ko[i].setEnabled(true);

}

private void handleC2()//处理C

{

result2.setText("0");

firstDigit = true;

operator2 = "=";

}

private void handleBS2()//处理Backspace

{

String text2 = new String(result2.getText());

int j2 = text2.length();

if(j2>0)

{

text2 = text2.substring(0,j2 - 1);

if(text2.length() == 0)

{

result2.setText("0");

firstDigit = true;

operator2 = "=";

}

else

{

result2.setText(text2);

}

}

}

public void handleMC2()//处理MC，清除内存

{

resultNum2 = 0.0;

result2.setText("0");

jj.setText(" ");

firstDigit = true;

operator2 = "=";

}

private void handleNB2(String key)//处理数字键

{

if(firstDigit)

{

result2.setText(key);

}

else if((key.equals("."))&&(result2.getText().indexOf(".")<0))

{

result2.setText(result2.getText() + ".");

}