用java设计计算器

Posted 2023-04-08

1设计一个简易计算器，要求使用GUI界面，能实现简易的计算器功能，能通过按键来输入操作数和操作运算符，实现四则运算。
我要其java的源代码！希望各位大虾帮帮忙！
是要通过按键来输入操作数和操作运算符的！

参考技术A import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;

public class calculator extends JFrame implements ActionListener
//这里我把JFrame写成Frame，这个错误找了好久
JFrame frame;

private JButton jia=new JButton("+");
private JButton jian=new JButton("-");
private JButton cheng=new JButton("*");
private JButton chu=new JButton("/");
private JButton qiuyi=new JButton("%");
private JButton deng=new JButton("=");
private JButton fu=new JButton("+/-");
private JButton dian=new JButton(".");
private JButton kai=new JButton("sqrt");
private JButton diao=new JButton("1/x");
private JButton aa=new JButton("A");
private JButton bb=new JButton("B");
private JButton cc=new JButton("C");
private JButton dd=new JButton("D");
private JButton ee=new JButton("E");
private JButton ff=new JButton("F");

private TextField k1=new TextField();
private objConversion convert = new objConversion();

JMenuItem copy,paste,s,t,help,about,me;
JRadioButton sixteen,ten,eight,two;
JButton backspace,ce,c,num0,num1,num2,num3,num4,num5,num6,num7,num8,num9;
Container cp;

JTextField text;
String copycontent="";
boolean clickable=true,clear=true;
int all=0;
double qian;
String fuhao;
int jin=10,first=1;

public calculator()

setTitle("计算器－杨彩制作");
setSize(400,300);
setLocation(250,200);
text=new JTextField(25);
// text.setEnabled(false);
text.setText("0.");
text.setHorizontalAlignment(JTextField.RIGHT);//从右到左

JPanel cp1=new JPanel();
JPanel cp2=new JPanel();
JPanel cp3=new JPanel();

cp=getContentPane();
cp.add(cp1,"North");
cp.add(cp2,"Center");
cp.add(cp3,"South");

cp1.setLayout(new GridLayout(1,6));
cp2.setLayout(new GridLayout(2,4));
cp3.setLayout(new GridLayout(6,6));

sixteen=new JRadioButton("十六进制");
sixteen.setVisible(false);
ten=new JRadioButton("十进制",true);
ten.setVisible(false);
eight=new JRadioButton("八进制");
eight.setVisible(false);
two=new JRadioButton("二进制");
two.setVisible(false);
sixteen.addActionListener(this);
ten.addActionListener(this);
eight.addActionListener(this);
two.addActionListener(this);
ButtonGroup btg=new ButtonGroup();

btg.add(sixteen);
btg.add(ten);
btg.add(eight);
btg.add(two);

JTextField t3=new JTextField(25);
cp1.add(text);
// text.setEnabled(false);
text.setEditable(false);
text.setBackground(new Color(255, 255, 255));

cp2.add(sixteen);
cp2.add(ten);
cp2.add(eight);
cp2.add(two);

backspace=new JButton("Backspace");
backspace.setForeground(new Color(255,0,0));
backspace.addActionListener(this);
ce=new JButton("CE");
ce.setForeground(new Color(255,0,0));
ce.addActionListener(this);
c=new JButton("C");
c.setForeground(new Color(255,0,0));
c.addActionListener(this);
k1.setVisible(false);
cp2.add(k1);
cp2.add(backspace);
cp2.add(ce);
cp2.add(c);

num0=new JButton("0");
num1=new JButton("1");
num2=new JButton("2");
num3=new JButton("3");
num4=new JButton("4");
num5=new JButton("5");
num6=new JButton("6");
num7=new JButton("7");
num8=new JButton("8");
num9=new JButton("9");

cp3.add(num7);
num7.addActionListener(this);
cp3.add(num8);
num8.addActionListener(this);
cp3.add(num9);
num9.addActionListener(this);
cp3.add(chu);
chu.setForeground(new Color(255,0,0));
chu.addActionListener(this);
cp3.add(kai);
kai.addActionListener(this);
cp3.add(num4);
num4.addActionListener(this);
cp3.add(num5);
num5.addActionListener(this);
cp3.add(num6);
num6.addActionListener(this);
cp3.add(cheng);
cheng.setForeground(new Color(255,0,0));
cheng.addActionListener(this);
cp3.add(qiuyi);
qiuyi.addActionListener(this);
cp3.add(num1);
num1.addActionListener(this);
cp3.add(num2);
num2.addActionListener(this);
cp3.add(num3);
num3.addActionListener(this);
cp3.add(jian);
jian.setForeground(new Color(255,0,0));
jian.addActionListener(this);
cp3.add(diao);
diao.addActionListener(this);
cp3.add(num0);
num0.addActionListener(this);
cp3.add(fu);
fu.addActionListener(this);
cp3.add(dian);
dian.addActionListener(this);
cp3.add(jia);
jia.setForeground(new Color(255,0,0));
jia.addActionListener(this);
cp3.add(deng);
deng.setForeground(new Color(255,0,0));
deng.addActionListener(this);
cp3.add(aa);
aa.addActionListener(this);
cp3.add(bb);
bb.addActionListener(this);
cp3.add(cc);
cc.addActionListener(this);
cp3.add(dd);
dd.addActionListener(this);
cp3.add(ee);
ee.addActionListener(this);
cp3.add(ff);
ff.addActionListener(this);
aa.setVisible(false);
bb.setVisible(false);
cc.setVisible(false);
dd.setVisible(false);
ee.setVisible(false);
ff.setVisible(false);

JMenuBar mainMenu = new JMenuBar();
setJMenuBar(mainMenu);
JMenu editMenu = new JMenu("编辑");
JMenu viewMenu = new JMenu("查看");
JMenu helpMenu = new JMenu("帮助");
mainMenu.add(editMenu);
mainMenu.add(viewMenu);
mainMenu.add(helpMenu);

copy = new JMenuItem(" 复制");
paste = new JMenuItem(" 粘贴");
KeyStroke copyks=KeyStroke.getKeyStroke(KeyEvent.VK_C,Event.CTRL_MASK);
copy.setAccelerator(copyks);//设置退出菜单选项加上快捷键
KeyStroke pasteks=KeyStroke.getKeyStroke(KeyEvent.VK_V,Event.CTRL_MASK);
paste.setAccelerator(pasteks);//设置退出菜单选项加上快捷键
editMenu.add(copy);
editMenu.add(paste);
copy.addActionListener(this);
paste.addActionListener(this);

t = new JMenuItem("●标准型");
s = new JMenuItem(" 科学型");
viewMenu.add(t);
viewMenu.add(s);
t.addActionListener(this);
s.addActionListener(this);

help = new JMenuItem(" 帮助主题");
about = new JMenuItem(" 关于计算器");
me = new JMenuItem(" 作者主页");
helpMenu.add(help);
helpMenu.add(about);
helpMenu.add(me);
help.addActionListener(this);
about.addActionListener(this);
me.addActionListener(this);

addWindowListener(new WindowDestroyer());//结束窗口


public void actionPerformed(ActionEvent e)

//响应动作代码

if(first==1)
text.setText("");
first=0;//第一次把文本框0.清空

Object temp = e.getSource();

if(temp==copy)

copycontent = text.getText();

if(temp==paste)

text.setText(text.getText()+copycontent);


if(temp==t)
//标准

sixteen.setVisible(false);
ten.setVisible(false);
eight.setVisible(false);
two.setVisible(false);
t.setText("●标准型");
s.setText(" 科学型");
aa.setVisible(false);
bb.setVisible(false);
cc.setVisible(false);
dd.setVisible(false);
ee.setVisible(false);
ff.setVisible(false);

if(temp==s)
//科学

sixteen.setVisible(true);
ten.setVisible(true);
eight.setVisible(true);
two.setVisible(true);
t.setText(" 标准型");
s.setText("●科学型");
aa.setVisible(true);
bb.setVisible(true);
cc.setVisible(true);
dd.setVisible(true);
ee.setVisible(true);
ff.setVisible(true);
aa.setEnabled(false);
bb.setEnabled(false);
cc.setEnabled(false);
dd.setEnabled(false);
ee.setEnabled(false);
ff.setEnabled(false);


if(temp==help)
//打开系统帮助文件 要查资料
try

String filePath = "C:/WINDOWS/Help/calc.chm";
Runtime.getRuntime().exec("cmd.exe /c "+filePath);


catch(Exception eeee)

System.out.println("打开系统的计算器出错");


if(temp==about)

JOptionPane.showMessageDialog(frame," Java计算器 杨彩 制作 http://blog.sina.com.cn/m/yangcai","关于计算器",JOptionPane.INFORMATION_MESSAGE); ;

if(temp==me)

try

Process p = Runtime.getRuntime().exec("explorer http://blog.sina.com.cn/m/yangcai");

catch(Exception eeee)

System.out.println("打开指定网页出错");



try

if(temp==sixteen)

String hex=text.getText();
int inthex=Integer.parseInt(hex,jin);//先把数变为10进制
text.setText(convert.decHex(inthex)) ;
jin=16;
aa.setEnabled(true);
bb.setEnabled(true);
cc.setEnabled(true);
dd.setEnabled(true);
ee.setEnabled(true);
ff.setEnabled(true);
num2.setEnabled(true);
num3.setEnabled(true);
num4.setEnabled(true);
num5.setEnabled(true);
num6.setEnabled(true);
num7.setEnabled(true);
num8.setEnabled(true);
num9.setEnabled(true);


if(temp==eight)

String oct =text.getText();
int intoct=Integer.parseInt(oct,jin);
text.setText(convert.decOct(intoct)) ;
jin=8;

aa.setEnabled(false);
bb.setEnabled(false);
cc.setEnabled(false);
dd.setEnabled(false);
ee.setEnabled(false);
ff.setEnabled(false);
num2.setEnabled(true);
num3.setEnabled(true);
num4.setEnabled(true);
num5.setEnabled(true);
num6.setEnabled(true);
num7.setEnabled(true);
num8.setEnabled(false);
num9.setEnabled(false);

if(temp==two)

String bin=text.getText();
int intbin=Integer.parseInt(bin,jin);
text.setText(convert.decBin(intbin));
jin=2;

aa.setEnabled(false);
bb.setEnabled(false);
cc.setEnabled(false);
dd.setEnabled(false);
ee.setEnabled(false);
ff.setEnabled(false);
num2.setEnabled(false);
num3.setEnabled(false);
num4.setEnabled(false);
num5.setEnabled(false);
num6.setEnabled(false);
num7.setEnabled(false);
num8.setEnabled(false);
num9.setEnabled(false);

if(temp==ten)

String dec=text.getText();
int intdec=Integer.parseInt(dec,jin);
// text.setText(convert.decDec(intdec)); //本句会把123变成321
text.setText(intdec+"");
jin=10;
aa.setEnabled(false);
bb.setEnabled(false);
cc.setEnabled(false);
dd.setEnabled(false);
ee.setEnabled(false);
ff.setEnabled(false);
num2.setEnabled(true);
num3.setEnabled(true);
num4.setEnabled(true);
num5.setEnabled(true);
num6.setEnabled(true);
num7.setEnabled(true);
num8.setEnabled(true);
num9.setEnabled(true);


catch(Exception ee)

System.out.println("转换出错,可能你没有输入任何字符");
text.setText("转换出错");
clear=false;


if(temp==backspace)
//退格
String s = text.getText();
text.setText("");
for (int i = 0; i < s.length() - 1; i++)

char a = s.charAt(i);
text.setText(text.getText() + a);



if (temp==ce)

text.setText("0.");
clear=true;
first=1;

if (temp==c)

text.setText("0."); ;
clear=true;
first=1;


if(temp==num0)

if(clear==false)//判断是否点击了符号位
text.setText("");
text.setText(text.getText()+"0");


if(temp==num1)

if(clear==false)
text.setText("");
text.setText(text.getText()+"1");
clear=true;//第二次不在清空（前二句）


if(temp==num2)

if(clear==false)
text.setText("");
text.setText(text.getText()+"2");
clear=true;


if(temp==num3)

if(clear==false)
text.setText("");
text.setText(text.getText()+"3");
clear=true;


if(temp==num4)

if(clear==false)
text.setText("");
text.setText(text.getText()+"4");
clear=true;


if(temp==num5)

if(clear==false)
text.setText("");
text.setText(text.getText()+"5");
clear=true;


if(temp==num6)

if(clear==false)
text.setText("");
text.setText(text.getText()+"6");
clear=true;

if(temp==num7)

if(clear==false)
text.setText("");
text.setText(text.getText()+"7");
clear=true;


if(temp==num8)

if(clear==false)
text.setText("");
text.setText(text.getText()+"8");
clear=true;


if(temp==num9)

if(clear==false)
text.setText("");
text.setText(text.getText()+"9");
clear=true;

if(temp==aa)

text.setText(text.getText()+"A");

if(temp==bb)

text.setText(text.getText()+"B");


if(temp==cc)

text.setText(text.getText()+"C");


if(temp==dd)

text.setText(text.getText()+"D");


if(temp==ee)

text.setText(text.getText()+"E");

if(temp==ff)

text.setText(text.getText()+"F");

if(temp==dian)

clickable=true;
for (int i = 0; i < text.getText().length(); i++)
if ('.' == text.getText().charAt(i))

clickable=false;
break;
//第一层判断是否里面含有小数点;

if(clickable==true)//第二坛判断
text.setText(text.getText()+".");



try

if(temp==jia)
//加法
qian=Double.parseDouble(text.getText());
fuhao="+";
clear=false;

if(temp==jian)

qian=Double.parseDouble(text.getText());
fuhao="-";
clear=false;
;


if(temp==cheng)

qian=Double.parseDouble(text.getText());
fuhao="*";
clear=false;


if(temp==chu)

qian=Double.parseDouble(text.getText());
fuhao="/";
clear=false;


if(temp==deng)

double ss=Double.parseDouble(text.getText());
text.setText("");
if(fuhao=="+")
text.setText(qian+ss+"");
if(fuhao=="-")
text.setText(qian-ss+"");
if(fuhao=="*")
text.setText(qian*ss+"");
if(fuhao=="/")
text.setText(qian/ss+"");
clear=false;//要清空前一次的数据
;



if(temp==kai)

String s = text.getText();
if (s.charAt(0) == '-')

text.setText("负数不能开根号");

else
text.setText(Double.toString(java.lang.Math.sqrt(Double.parseDouble(text.getText()))));
clear=false;


if(temp==diao)


if (text.getText().charAt(0) == '0'&&text.getText().length() == 1)

text.setText("除数不能为零");

else

boolean isDec = true;
int i, j, k;
String s = Double.toString(1 / Double.parseDouble(text.getText()));
for (i = 0; i < s.length(); i++)
if (s.charAt(i) == '.')
break;
for (j = i + 1; j < s.length(); j++)
if (s.charAt(j) != '0')

isDec = false;
break;

if (isDec == true)

String stemp = "";
for (k = 0; k < i; k++)
stemp += s.charAt(k);
text.setText(stemp);

else
text.setText(s);


clear=false;

if(temp==qiuyi)

text.setText("0");
clear=false;

if (temp == fu)
//导师，此方法参考书中例子
boolean isNumber = true;
String s = text.getText();
for (int i = 0; i < s.length(); i++)
if (! (s.charAt(i) >= '0' && s.charAt(i) <= '9' || s.charAt(i) == '.' ||
s.charAt(i) == '-'))

isNumber = false;
break;

if (isNumber == true)

//如果当前字符串首字母有'-'号,代表现在是个负数,再按下时,则将首符号去掉
if (s.charAt(0) == '-')

text.setText("");
for (int i = 1; i < s.length(); i++)

char a = s.charAt(i);
text.setText(text.getText() + a);


//如果当前字符串第一个字符不是符号，则添加一个符号在首字母处
else
text.setText('-' + s);




catch(Exception eee)

System.out.println("运算时,首先输入数字或字符");
text.setText("运算出错");
clear=false;




class WindowDestroyer extends WindowAdapter
//退出窗口动作
public void windowClosing(WindowEvent e)

System.exit(0);



class objConversion
//导师,本进制类参考了CSMD类转换例子

public void objConversion ()



public String decDec (int decNum)
//10

String strDecNum = Integer.toString(decNum);

for (int i = strDecNum.length(); i < 3; i++)

strDecNum = "0" + strDecNum;


// return strDecNum;
return invert (strDecNum, 5);



public String decHex (int decNum)
//10 to 16

String strHexNum = "";
int currentNum = 0;

while (decNum != 0)


if (decNum > 15)


currentNum = decNum % 16;
decNum /= 16;


else


currentNum = decNum;
decNum = 0;



switch (currentNum)


case 15: strHexNum += "F";
break;
case 14: strHexNum += "E";
break;
case 13: strHexNum += "D";
break;
case 12: strHexNum += "C";
break;
case 11: strHexNum += "B";
break;
case 10: strHexNum += "A";
break;
default: strHexNum += Integer.toString(currentNum);
break;





return invert (strHexNum, 2);



public String decOct (int decNum)
//10 to 8

String strOctNum = "";

while (decNum != 0)


if (decNum > 7)


strOctNum += Integer.toString(decNum % 8);
decNum /= 8;


else


strOctNum += Integer.toString(decNum);
decNum = 0;





return invert (strOctNum, 3);



public String decBin (int decNum)
//10 to 2

String strBinNum = "";

while (decNum != 0)


if (decNum > 1)


strBinNum += Integer.toString(decNum % 2);
decNum /= 2;


else


strBinNum += Integer.toString(decNum);
decNum = 0;





return invert (strBinNum, 8);



private String invert (String strNum, int minLength) //转换长度


String answer = "";
int length = strNum.length();

if (length < minLength)


for (int padding = (minLength - length); padding > 0; padding--)

answer += "0";




for (int i = length; i > 0; i--)

answer += strNum.charAt (i - 1);


return answer;





public static void main(String arg[])//产生窗口

calculator win = new calculator();
win.setVisible(true);


本回答被提问者采纳

用Java设计一个图形界面（GUI）的计算器应用程序，完成简单的算术运算

设计的计算器应用程序可以完成家法、减法、乘法、除法和取余运算。且有小数点、正负号、求倒数、退格和清零功能。
急急急！！！拜托！！！！

参考技术A 下午发
五分钟搞定，先给你发个简单的，照例子自己去做你想要的计算器
package aaa;
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class YunSuan implements ActionListener,ItemListener

public static JFrame jf;
public static Container c;
public static JTextField jtf1,jtf2,jtf3;
public static JButton jb1;
public static Choice c2;

public static String fuhao="";

public YunSuan()

jf=new JFrame("加减乘除运算");
c=jf.getContentPane();
c.setLayout(new FlowLayout());
jtf1=new JTextField(10);
jtf2=new JTextField(10);
jtf3=new JTextField(10);
c2=new Choice();
jb1=new JButton("=");



public void Jiemian()


c.add(jtf1);
c2.addItemListener(this);
c2.add("");
c2.add("+");
c2.add("-");
c2.add("*");
c2.add("/");
c.add(c2);
c.add(jtf2);
jb1.addActionListener(this);
c.add(jb1);
c.add(jtf3);

jf.setLocation(200,100);
jf.setVisible(true);
jf.pack();

public static void main(String args[])

YunSuan ys=new YunSuan();
ys.Jiemian();


public void actionPerformed(ActionEvent e)
// TODO Auto-generated method stub
double s1=Integer.parseInt(jtf1.getText());
double s2=Integer.parseInt(jtf2.getText());
double result=0;
if(fuhao.equals("+"))

result=s1+s2;
String result2=String.valueOf(result);
jtf3.setText(result2);

if(fuhao.equals("-"))

result=s1-s2;
String result2=String.valueOf(result);
jtf3.setText(result2);

if(fuhao.equals("*"))

result=s1*s2;
String result2=String.valueOf(result);
jtf3.setText(result2);

if(fuhao.equals("/"))

result=s1/s2;
String result2=String.valueOf(result);
jtf3.setText(result2);



public void itemStateChanged(ItemEvent ie)

if(ie.getSource()==c2)

String str1=c2.getSelectedItem();
fanhui(str1);


public String fanhui(String str2)

return fuhao=str2;