java计算器代码,请帮我修改

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head

meta http-equiv="Content-Type" content="text/html; charset=gb2312"

title科学计算器/title

style

!--

BODY {font-size: 12px;background-color: #d4d4d4;color: #0001fC;background-attachment: fixed;}

td{font-size:12px; font-color:#000000}

//--

/style

script language="javascript"

!--

var endNumber=true

var mem=0

var carry=10

var hexnum="0123456789abcdef"

var angle="d"

var stack=""

var level="0"

var layer=0

//数字键

function inputkey(key)

{

var index=key.charCodeAt(0);

if ((carry==2 (index==48 || index==49))

|| (carry==8 index=48 index=55)

|| (carry==10 (index=48 index=57 || index==46))

|| (carry==16 ((index=48 index=57) || (index=97 index=102))))

if(endNumber)

{

endNumber=false

document.calc.display.value = key

}

else if(document.calc.display.value == null || document.calc.display.value == "0")

document.calc.display.value = key

else

document.calc.display.value += key

}

function changeSign()

{

if (document.calc.display.value!="0")

if(document.calc.display.value.substr(0,1) == "-")

document.calc.display.value = document.calc.display.value.substr(1)

else

document.calc.display.value = "-" + document.calc.display.value

}

//函数键

function inputfunction(fun,shiftfun)

{

endNumber=true

if (document.calc.shiftf.checked)

document.calc.display.value=decto(funcalc(shiftfun,(todec(document.calc.display.value,carry))),carry)

else

document.calc.display.value=decto(funcalc(fun,(todec(document.calc.display.value,carry))),carry)

document.calc.shiftf.checked=false

document.calc.hypf.checked=false

inputshift()

}

function inputtrig(trig,arctrig,hyp,archyp)

{

if (document.calc.hypf.checked)

inputfunction(hyp,archyp)

else

inputfunction(trig,arctrig)

}

//运算符

function operation(join,newlevel)

{

endNumber=true

var temp=stack.substr(stack.lastIndexOf("(")+1)+document.calc.display.value

while (newlevel!=0 (newlevel=(level.charAt(level.length-1))))

{

temp=parse(temp)

level=level.slice(0,-1)

}

if (temp.match(/^(.*\d[\+\-\*\/\%\^\\|x])?([+-]?[0-9a-f\.]+)$/))

document.calc.display.value=RegExp.$2

stack=stack.substr(0,stack.lastIndexOf("(")+1)+temp+join

document.calc.operator.value=" "+join+" "

level=level+newlevel

}

//括号

function addbracket()

{

endNumber=true

document.calc.display.value=0

stack=stack+"("

document.calc.operator.value=" "

level=level+0

layer+=1

document.calc.bracket.value="(="+layer

}

function disbracket()

{

endNumber=true

var temp=stack.substr(stack.lastIndexOf("(")+1)+document.calc.display.value

while ((level.charAt(level.length-1))0)

{

temp=parse(temp)

level=level.slice(0,-1)

}

document.calc.display.value=temp

stack=stack.substr(0,stack.lastIndexOf("("))

document.calc.operator.value=" "

level=level.slice(0,-1)

layer-=1

if (layer0)

document.calc.bracket.value="(="+layer

else

document.calc.bracket.value=""

}

//等号

function result()

{

endNumber=true

while (layer0)

disbracket()

var temp=stack+document.calc.display.value

while ((level.charAt(level.length-1))0)

{

temp=parse(temp)

level=level.slice(0,-1)

}

document.calc.display.value=temp

document.calc.bracket.value=""

document.calc.operator.value=""

stack=""

level="0"

}

//修改键

function backspace()

{

if (!endNumber)

{

if(document.calc.display.value.length1)

document.calc.display.value=document.calc.display.value.substring(0,document.calc.display.value.length - 1)

else

document.calc.display.value=0

}

}

function clearall()

{

document.calc.display.value=0

endNumber=true

stack=""

level="0"

layer=""

document.calc.operator.value=""

document.calc.bracket.value=""

}

//转换键

function inputChangCarry(newcarry)

{

endNumber=true

document.calc.display.value=(decto(todec(document.calc.display.value,carry),newcarry))

carry=newcarry

document.calc.sin.disabled=(carry!=10)

document.calc.cos.disabled=(carry!=10)

document.calc.tan.disabled=(carry!=10)

document.calc.bt.disabled=(carry!=10)

document.calc.pi.disabled=(carry!=10)

document.calc.e.disabled=(carry!=10)

document.calc.kp.disabled=(carry!=10)

document.calc.k2.disabled=(carry=2)

document.calc.k3.disabled=(carry=2)

document.calc.k4.disabled=(carry=2)

document.calc.k5.disabled=(carry=2)

document.calc.k6.disabled=(carry=2)

document.calc.k7.disabled=(carry=2)

document.calc.k8.disabled=(carry=8)

document.calc.k9.disabled=(carry=8)

document.calc.ka.disabled=(carry=10)

document.calc.kb.disabled=(carry=10)

document.calc.kc.disabled=(carry=10)

document.calc.kd.disabled=(carry=10)

document.calc.ke.disabled=(carry=10)

document.calc.kf.disabled=(carry=10)

}

function inputChangAngle(angletype)

{

endNumber=true

angle=angletype

if (angle=="d")

document.calc.display.value=radiansToDegress(document.calc.display.value)

else

document.calc.display.value=degressToRadians(document.calc.display.value)

endNumber=true

}

function inputshift()

{

if (document.calc.shiftf.checked)

{

document.calc.bt.value="deg "

document.calc.ln.value="exp "

document.calc.log.value="expd"

if (document.calc.hypf.checked)

{

document.calc.sin.value="ahs "

document.calc.cos.value="ahc "

document.calc.tan.value="aht "

}

else

{

document.calc.sin.value="asin"

document.calc.cos.value="acos"

document.calc.tan.value="atan"

}

document.calc.sqr.value="x^.5"

document.calc.cube.value="x^.3"

document.calc.floor.value="小数"

}

else

{

document.calc.bt.value="d.ms"

document.calc.ln.value=" ln "

document.calc.log.value="log "

if (document.calc.hypf.checked)

{

document.calc.sin.value="hsin"

document.calc.cos.value="hcos"

document.calc.tan.value="htan"

}

else

{

document.calc.sin.value="sin "

document.calc.cos.value="cos "

document.calc.tan.value="tan "

}

document.calc.sqr.value="x^2 "

document.calc.cube.value="x^3 "

document.calc.floor.value="取整"

}

}

//存储器部分

function clearmemory()

{

mem=0

document.calc.memory.value=" "

}

function getmemory()

{

endNumber=true

document.calc.display.value=decto(mem,carry)

}

function putmemory()

{

endNumber=true

if (document.calc.display.value!=0)

{

mem=todec(document.calc.display.value,carry)

document.calc.memory.value=" M "

}

else

document.calc.memory.value=" "

}

function addmemory()

{

endNumber=true

mem=parseFloat(mem)+parseFloat(todec(document.calc.display.value,carry))

if (mem==0)

document.calc.memory.value=" "

else

document.calc.memory.value=" M "

}

function multimemory()

{

endNumber=true

mem=parseFloat(mem)*parseFloat(todec(document.calc.display.value,carry))

if (mem==0)

document.calc.memory.value=" "

else

document.calc.memory.value=" M "

}

//十进制转换

function todec(num,oldcarry)

{

if (oldcarry==10 || num==0) return(num)

var neg=(num.charAt(0)=="-")

if (neg) num=num.substr(1)

var newnum=0

for (var index=1;index=num.length;index++)

newnum=newnum*oldcarry+hexnum.indexOf(num.charAt(index-1))

if (neg)

newnum=-newnum

return(newnum)

}

function decto(num,newcarry)

{

var neg=(num0)

if (newcarry==10 || num==0) return(num)

num=""+Math.abs(num)

var newnum=""

while (num!=0)

{

newnum=hexnum.charAt(num%newcarry)+newnum

num=Math.floor(num/newcarry)

}

if (neg)

newnum="-"+newnum

return(newnum)

}

//表达式解析

function parse(string)

{

if (string.match(/^(.*\d[\+\-\*\/\%\^\\|x\])?([+-]?[0-9a-f\.]+)([\+\-\*\/\%\^\\|x\])([+-]?[0-9a-f\.]+)$/))

return(RegExp.$1+cypher(RegExp.$2,RegExp.$3,RegExp.$4))

else

return(string)

}

//数学运算和位运算

function cypher(left,join,right)

{

left=todec(left,carry)

right=todec(right,carry)

if (join=="+")

return(decto(parseFloat(left)+parseFloat(right),carry))

if (join=="-")

return(decto(left-right,carry))

if (join=="*")

return(decto(left*right,carry))

if (join=="/" right!=0)

return(decto(left/right,carry))

if (join=="%")

return(decto(left%right,carry))

if (join=="")

return(decto(leftright,carry))

if (join=="|")

return(decto(left|right,carry))

if (join=="^")

return(decto(Math.pow(left,right),carry))

if (join=="x")

return(decto(left^right,carry))

if (join=="")

return(decto(leftright,carry))

alert("除数不能为零")

return(left)

}

//函数计算

function funcalc(fun,num)

{

with(Math)

{

if (fun=="pi")

return(PI)

if (fun=="e")

return(E)

if (fun=="abs")

return(abs(num))

if (fun=="ceil")

return(ceil(num))

if (fun=="round")

return(round(num))

if (fun=="floor")

return(floor(num))

if (fun=="deci")

return(num-floor(num))

if (fun=="ln" num0)

return(log(num))

if (fun=="exp")

return(exp(num))

if (fun=="log" num0)

return(log(num)*LOG10E)

if (fun=="expdec")

return(pow(10,num))

if (fun=="cube")

return(num*num*num)

if (fun=="cubt")

return(pow(num,1/3))

if (fun=="sqr")

return(num*num)

if (fun=="sqrt" num=0)

return(sqrt(num))

if (fun=="!")

return(factorial(num))

if (fun=="recip" num!=0)

return(1/num)

if (fun=="dms")

return(dms(num))

if (fun=="deg")

return(deg(num))

if (fun=="~")

return(~num)

if (angle=="d")

{

if (fun=="sin")

return(sin(degressToRadians(num)))

if (fun=="cos")

return(cos(degressToRadians(num)))

if (fun=="tan")

return(tan(degressToRadians(num)))

if (fun=="arcsin" abs(num)=1)

return(radiansToDegress(asin(num)))

if (fun=="arccos" abs(num)=1)

return(radiansToDegress(acos(num)))

if (fun=="arctan")

return(radiansToDegress(atan(num)))

}

else

{

if (fun=="sin")

return(sin(num))

if (fun=="cos")

return(cos(num))

if (fun=="tan")

return(tan(num))

if (fun=="arcsin" abs(num)=1)

return(asin(num))

if (fun=="arccos" abs(num)=1)

return(acos(num))

if (fun=="arctan")

return(atan(num))

}

if (fun=="hypsin")

return((exp(num)-exp(0-num))*0.5)

if (fun=="hypcos")

return((exp(num)+exp(-num))*0.5)

if (fun=="hyptan")

return((exp(num)-exp(-num))/(exp(num)+exp(-num)))

if (fun=="ahypsin" | fun=="hypcos" | fun=="hyptan")

{

alert("对不起,公式还没有查到!")

return(num)

}

alert("超出函数定义范围")

return(num)

}

}

function factorial(n)

{

n=Math.abs(parseInt(n))

var fac=1

for (;n0;n-=1)

fac*=n

return(fac)

}

function dms(n)

{

var neg=(n0)

with(Math)

{

n=abs(n)

var d=floor(n)

var m=floor(60*(n-d))

var s=(n-d)*60-m

}

var dms=d+m/100+s*0.006

if (neg)

dms=-dms

return(dms)

}

function deg(n)

{

var neg=(n0)

with(Math)

{

n=abs(n)

var d=floor(n)

var m=floor((n-d)*100)

var s=(n-d)*100-m

}

var deg=d+m/60+s/36

if (neg)

deg=-deg

return(deg)

}

function degressToRadians(degress)

{

return(degress*Math.PI/180)

}

function radiansToDegress(radians)

{

return(radians*180/Math.PI)

}

//界面

//--

/script

/head

!--written by GoldHuman li hai--

!--2000.8--

body

div align="center"

form name=calc

table border="1" width="500" height="250"

tr

td height=50

table width=500

td width="133"

/td

td width="353"

div align=center

input type=text name="display" value="0" readonly size="40"

/div

/td

/table

/td

/tr

tr

td

table width=500

tr

td width=290

input type=radio name="carry" onClick="inputChangCarry(16)"

十六进制

input type=radio name="carry" checked onClick="inputChangCarry(10)"

十进制

input type=radio name="carry" onClick="inputChangCarry(8)"

八进制

input type=radio name="carry" onClick="inputChangCarry(2)"

二进制

/td

td

/td

td width=135

input type=radio name="angle" value="d" onClick="inputChangAngle('d')" checked

角度制

input type=radio name="angle" value="r" onClick="inputChangAngle('r')"

弧度制

/td

/tr

/table

table width=500

tr

td width=170

input name="shiftf" type="checkbox" onclick="inputshift()"上档功能

input name="hypf" type="checkbox" onclick="inputshift()"双曲函数

/td

td

input name="bracket" value="" type=text size=3 readonly style="background-color=lightgrey"

input name="memory" value="" type=text size=3 readonly style="background-color=lightgrey"

input name="operator" value="" type=text size=3 readonly style="background-color=lightgrey"

/td

td width=183

input type="button" value=" 退格 "

onclick="backspace()" style="color=red"

input type="button" value=" 清屏 "

onClick="document.calc.display.value = 0 " style="color=red"

input type="button" value=" 全清"

onClick="clearall()" style="color=red"

/td

/tr

/table

table width=500

tr

td

table

tr align=center

td

input name=pi type="button" value=" PI "

onClick="inputfunction('pi','pi')" style="color=blue"

/td

td

input name=e type="button" value=" E "

onClick="inputfunction('e','e')" style="color=blue"

/td

td

input name=bt type="button" value="d.ms"

onClick="inputfunction('dms','deg')" style="color=#ff00ff"

/td

/tr

tr align=center

td

input type="button" value=" ( "

onClick="addbracket()" style="color=#ff00ff"

/td

td

input type="button" value=" ) "

onClick="disbracket()" style="color=#ff00ff"

/td

td

input name=ln type="button" value=" ln "

onClick="inputfunction('ln','exp')" style="color=#ff00ff"

/td

/tr

tr align=center

td

input name=sin type="button" value="sin "

onClick="inputtrig('sin','arcsin','hypsin','ahypsin')" style="color=#ff00ff"

/td

td

input type="button" value="x^y "

onClick="operation('^',7)" style="color=#ff00ff"

/td

td

input name=log type="button" value="log "

onClick="inputfunction('log','expdec')" style="color=#ff00ff"

/td

/tr

tr align=center

td

input name=cos type="button" value="cos "

onClick="inputtrig('cos','arccos','hypcos','ahypcos')" style="color=#ff00ff"

/td

td

input name=cube type="button" value="x^3 "

onClick="inputfunction('cube','cubt')" style="color=#ff00ff"

/td

td

input type="button" value=" n! "

onClick="inputfunction('!','!')" style="color=#ff00ff"

/td

/tr

tr align=center

td

input name=tan type="button" value="tan "

onClick="inputtrig('tan','arctan','hyptan','ahyptan')" style="color=#ff00ff"

/td

td

input name=sqr type="button" value="x^2 "

onClick="inputfunction('sqr','sqrt')" style="color=#ff00ff"

/td

td

input type="button" value="1/x "

onClick="inputfunction('recip','recip')" style="color=#ff00ff"

/td

/tr

/table

/td

td width=30

/td

td

table

tr

td

input type="button" value=" 储存 "

onClick="putmemory()" style="color=red"

/td

/tr

td

input type="button" value=" 取存 "

onClick="getmemory()" style="color=red"

/td

/tr

tr

td

input type="button" value=" 累存 "

onClick="addmemory()" style="color=red"

/td

/tr

tr

td

input type="button" value=" 积存 "

onClick="multimemory()" style="color=red"

/td

/tr

tr

td height="33"

input type="button" value=" 清存 "

onClick="clearmemory()" style="color=red"

/td

/tr

/table

/td

td width=30

/td

td

table

tr align=center

td

input name=k7 type="button" value=" 7 "

onClick="inputkey('7')" style="color=blue"

/td

td

input name=k8 type="button" value=" 8 "

onClick="inputkey('8')" style="color=blue"

/td

td

input name=k9 type="button" value=" 9 "

onClick="inputkey('9')" style="color=blue"

/td

td

input type="button" value=" / "

onClick="operation('/',6)" style="color=red"

/td

td

input type="button" value="取余"

onClick="operation('%',6)" style="color=red"

/td

td

input type="button" value=" 与 "

onClick="operation('',3)" style="color=red"

/td

/tr

tr align=center

td

input name=k4 type="button" value=" 4 "

onClick="inputkey('4')" style="color=blue"

/td

td

input name=k5 type="button" value=" 5 "

onClick="inputkey('5')" style="color=blue"

/td

td

input name=k6 type="button" value=" 6 "

onClick="inputkey('6')" style="color=blue"

/td

td

input type="button" value=" * "

onClick="operation('*',6)" style="color=red"

/td

td

input name=floor type="button" value="取整"

onClick="inputfunction('floor','deci')" style="color=red"

/td

td

input type="button" value=" 或 "

onClick="operation('|',1)" style="color=red"

/td

/tr

tr align=center

td

input type="button" value=" 1 "

onClick="inputkey('1')" style="color=blue"

/td

td

input name=k2 type="button" value=" 2 "

onClick="inputkey('2')" style="color=blue"

/td

td

input name=k3 type="button" value=" 3 "

onClick="inputkey('3')" style="color=blue"

/td

td

input type="button" value=" - "

onClick="operation('-',5)" style="color=red"

/td

td

input type="button" value="左移"

onClick="operation('',4)" style="color=red"

/td

td

input type="button" value=" 非 "

onClick="inputfunction('~','~')" style="color=red"

/td

/tr

tr align=center

td

input type="button" value=" 0 "

onClick="inputkey('0')" style="color=blue"

/td

td

input type="button" value="+/-"

onClick="changeSign()" style="color=blue"

/td

td

input name=kp type="button" value=" . "

onClick="inputkey('.')" style="color=blue"

/td

td

input type="button" value=" + "

onClick="operation('+',5)" style="color=red"

/td

td

input type="button" value=" ＝ "

onClick="result()" style="color=red"

/td

td

input type="button" value="异或"

onClick="operation('x',2)" style="color=red"

/td

/tr

tr align=center

td

input name=ka type="button" value=" A "

onClick="inputkey('a')" style="color=blue" disabled=true

/td

td

input name=kb type="button" value=" B "

onClick="inputkey('b')" style="color=blue" disabled=true

/td

td

input name=kc type="button" value=" C "

onClick="inputkey('c')" style="color=blue" disabled=true

/td

td

input name=kd type="button" value=" D "

onClick="inputkey('d')" style="color=blue" disabled=true

/td

td

input name=ke type="button" value=" E　"

onClick="inputkey('e')" style="color=blue" disabled=true

/td

td

input name=kf type="button" value=" F　"

onClick="inputkey('f')" style="color=blue" disabled=true

/td

/tr

/table

/td

/tr

/table

/td

/tr

/table

/form

/div

/body

/html

java计算器的源代码

import java.awt.*;

import java.awt.event.*;

import java.lang.*;

import javax.swing.*;

public class Counter extends Frame

{

//声明三个面板的布局

GridLayout gl1,gl2,gl3;

Panel p0,p1,p2,p3;

JTextField tf1;

TextField tf2;

Button b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16,b17,b18,b19,b20,b21,b22,b23,b24,b25,b26;

StringBuffer str;//显示屏所显示的字符串

double x,y;//x和y都是运算数

int z;//Z表示单击了那一个运算符.0表示"+",1表示"-",2表示"*",3表示"/"

static double m;//记忆的数字

public Counter()

{

gl1=new GridLayout(1,4,10,0);//实例化三个面板的布局

gl2=new GridLayout(4,1,0,15);

gl3=new GridLayout(4,5,10,15);

tf1=new JTextField(27);//显示屏

tf1.setHorizontalAlignment(JTextField.RIGHT);

tf1.setEnabled(false);

tf1.setText("0");

tf2=new TextField(10);//显示记忆的索引值

tf2.setEditable(false);

//实例化所有按钮、设置其前景色并注册监听器

b0=new Button("Backspace");

b0.setForeground(Color.red);

b0.addActionListener(new Bt());

b1=new Button("CE");

b1.setForeground(Color.red);

b1.addActionListener(new Bt());

b2=new Button("C");

b2.setForeground(Color.red);

b2.addActionListener(new Bt());

b3=new Button("MC");

b3.setForeground(Color.red);

b3.addActionListener(new Bt());

b4=new Button("MR");

b4.setForeground(Color.red);

b4.addActionListener(new Bt());

b5=new Button("MS");

b5.setForeground(Color.red);

b5.addActionListener(new Bt());

b6=new Button("M+");

b6.setForeground(Color.red);

b6.addActionListener(new Bt());

b7=new Button("7");

b7.setForeground(Color.blue);

b7.addActionListener(new Bt());

b8=new Button("8");

b8.setForeground(Color.blue);

b8.addActionListener(new Bt());

b9=new Button("9");

b9.setForeground(Color.blue);

b9.addActionListener(new Bt());

b10=new Button("/");

b10.setForeground(Color.red);

b10.addActionListener(new Bt());

b11=new Button("sqrt");

b11.setForeground(Color.blue);

b11.addActionListener(new Bt());

b12=new Button("4");

b12.setForeground(Color.blue);

b12.addActionListener(new Bt());

b13=new Button("5");

b13.setForeground(Color.blue);

b13.addActionListener(new Bt());

b14=new Button("6");

b14.setForeground(Color.blue);

b14.addActionListener(new Bt());

b15=new Button("*");

b15.setForeground(Color.red);

b15.addActionListener(new Bt());

b16=new Button("%");

b16.setForeground(Color.blue);

b16.addActionListener(new Bt());

b17=new Button("1");

b17.setForeground(Color.blue);

b17.addActionListener(new Bt());

b18=new Button("2");

b18.setForeground(Color.blue);

b18.addActionListener(new Bt());

b19=new Button("3");

b19.setForeground(Color.blue);

b19.addActionListener(new Bt());

b20=new Button("-");

b20.setForeground(Color.red);

b20.addActionListener(new Bt());

b21=new Button("1/X");

b21.setForeground(Color.blue);

b21.addActionListener(new Bt());

b22=new Button("0");

b22.setForeground(Color.blue);

b22.addActionListener(new Bt());

b23=new Button("+/-");

b23.setForeground(Color.blue);

b23.addActionListener(new Bt());

b24=new Button(".");

b24.setForeground(Color.blue);

b24.addActionListener(new Bt());

b25=new Button("+");

b25.setForeground(Color.red);

b25.addActionListener(new Bt());

b26=new Button("=");

b26.setForeground(Color.red);

b26.addActionListener(new Bt());

//实例化四个面板

p0=new Panel();

p1=new Panel();

p2=new Panel();

p3=new Panel();

//创建一个空字符串缓冲区

str=new StringBuffer();

//添加面板p0中的组件和设置其在框架中的位置和大小

p0.add(tf1);

p0.setBounds(10,25,300,40);

//添加面板p1中的组件和设置其在框架中的位置和大小

p1.setLayout(gl1);

p1.add(tf2);

p1.add(b0);

p1.add(b1);

p1.add(b2);

p1.setBounds(10,65,300,25);

//添加面板p2中的组件并设置其的框架中的位置和大小

p2.setLayout(gl2);

p2.add(b3);

p2.add(b4);

p2.add(b5);

p2.add(b6);

p2.setBounds(10,110,40,150);

//添加面板p3中的组件并设置其在框架中的位置和大小

p3.setLayout(gl3);//设置p3的布局

p3.add(b7);

p3.add(b8);

p3.add(b9);

p3.add(b10);

p3.add(b11);

p3.add(b12);

p3.add(b13);

p3.add(b14);

p3.add(b15);

p3.add(b16);

p3.add(b17);

p3.add(b18);

p3.add(b19);

p3.add(b20);

p3.add(b21);

p3.add(b22);

p3.add(b23);

p3.add(b24);

p3.add(b25);

p3.add(b26);

p3.setBounds(60,110,250,150);

//设置框架中的布局为空布局并添加4个面板

setLayout(null);

add(p0);

add(p1);

add(p2);

add(p3);

setResizable(false);//禁止调整框架的大小

//匿名类关闭窗口

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e1)

{

System.exit(0);

}

});

setBackground(Color.lightGray);

setBounds(100,100,320,280);

setVisible(true);

}

//构造监听器

class Bt implements ActionListener

{

public void actionPerformed(ActionEvent e2)

{

try{

if(e2.getSource()==b1)//选择"CE"清零

{

tf1.setText("0");//把显示屏清零

str.setLength(0);//清空字符串缓冲区以准备接收新的输入运算数

}

else if(e2.getSource()==b2)//选择"C"清零

{

tf1.setText("0");//把显示屏清零

str.setLength(0);

}

else if(e2.getSource()==b23)//单击"+/-"选择输入的运算数是正数还是负数

{

x=Double.parseDouble(tf1.getText().trim());

tf1.setText(""+(-x));

}

else if(e2.getSource()==b25)//单击加号按钮获得x的值和z的值并清空y的值

{

x=Double.parseDouble(tf1.getText().trim());

str.setLength(0);//清空缓冲区以便接收新的另一个运算数

y=0d;

z=0;

}

else if(e2.getSource()==b20)//单击减号按钮获得x的值和z的值并清空y的值

{

x=Double.parseDouble(tf1.getText().trim());

str.setLength(0);

y=0d;

z=1;

}

else if(e2.getSource()==b15)//单击乘号按钮获得x的值和z的值并清空y的值

{

x=Double.parseDouble(tf1.getText().trim());

str.setLength(0);

y=0d;

z=2;

}

else if(e2.getSource()==b10)//单击除号按钮获得x的值和z的值并空y的值

{

x=Double.parseDouble(tf1.getText().trim());

str.setLength(0);

y=0d;

z=3;

}

else if(e2.getSource()==b26)//单击等号按钮输出计算结果

{

str.setLength(0);

switch(z)

{

case 0 : tf1.setText(""+(x+y));break;

case 1 : tf1.setText(""+(x-y));break;

case 2 : tf1.setText(""+(x*y));break;

case 3 : tf1.setText(""+(x/y));break;

}

}

else if(e2.getSource()==b24)//单击"."按钮输入小数

{

if(tf1.getText().trim().indexOf(′.′)!=-1)//判断字符串中是否已经包含了小数点

{

}

else//如果没数点有小

{

if(tf1.getText().trim().equals("0"))//如果初时显示为0

{

str.setLength(0);

tf1.setText((str.append("0"+e2.getActionCommand())).toString());

}

else if(tf1.getText().trim().equals(""))//如果初时显示为空则不做任何操作

{

}

else

{

tf1.setText(str.append(e2.getActionCommand()).toString());

}

}

y=0d;

}

else if(e2.getSource()==b11)//求平方根

{

x=Double.parseDouble(tf1.getText().trim());

tf1.setText("数字格式异常");

if(x0)

tf1.setText("负数没有平方根");

else

tf1.setText(""+Math.sqrt(x));

str.setLength(0);

y=0d;

}

else if(e2.getSource()==b16)//单击了"%"按钮

{

x=Double.parseDouble(tf1.getText().trim());

tf1.setText(""+(0.01*x));

str.setLength(0);

y=0d;

}

else if(e2.getSource()==b21)//单击了"1/X"按钮

{

x=Double.parseDouble(tf1.getText().trim());

if(x==0)

{

tf1.setText("除数不能为零");

}

else

{

tf1.setText(""+(1/x));

}

str.setLength(0);

y=0d;

}

else if(e2.getSource()==b3)//MC为清除内存

{

m=0d;

tf2.setText("");

str.setLength(0);

}

else if(e2.getSource()==b4)//MR为重新调用存储的数据

{

if(tf2.getText().trim()!="")//有记忆数字

{

tf1.setText(""+m);

}

}

else if(e2.getSource()==b5)//MS为存储显示的数据

{

m=Double.parseDouble(tf1.getText().trim());

tf2.setText("M");

tf1.setText("0");

str.setLength(0);

}

else if(e2.getSource()==b6)//M+为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

{

m=m+Double.parseDouble(tf1.getText().trim());

}

else//选择的是其他的按钮

{

if(e2.getSource()==b22)//如果选择的是"0"这个数字键

{

if(tf1.getText().trim().equals("0"))//如果显示屏显示的为零不做操作

{

}

else

{

tf1.setText(str.append(e2.getActionCommand()).toString());

y=Double.parseDouble(tf1.getText().trim());

}

}

else if(e2.getSource()==b0)//选择的是“BackSpace”按钮

{

if(!tf1.getText().trim().equals("0"))//如果显示屏显示的不是零

{

if(str.length()!=1)

{

tf1.setText(str.delete(str.length()-1,str.length()).toString());//可能抛出字符串越界异常

}

else

{

tf1.setText("0");

str.setLength(0);

}

}

y=Double.parseDouble(tf1.getText().trim());

}

else//其他的数字键

{

tf1.setText(str.append(e2.getActionCommand()).toString());

y=Double.parseDouble(tf1.getText().trim());

}

}

}

catch(NumberFormatException e){

tf1.setText("数字格式异常");

}

catch(StringIndexOutOfBoundsException e){

tf1.setText("字符串索引越界");

}

}

}

public static void main(String args[])

{

new Counter();

java计算器代码，只有加减乘除和取余运算的？？

import java.awt.*;

import java.awt.event.*;

import java.lang.*;

import javax.swing.*;

public class Counter extends Frame

{

//声明三个面板的布局

GridLayout gl1,gl2,gl3;

Panel p0,p1,p2,p3;

JTextField tf1;

TextField tf2;

Button b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16,b17,b18,b19,b20,b21,b22,b23,b24,b25,b26;

StringBuffer str;//显示屏所显示的字符串

double x,y;//x和y都是运算数

int z;//Z表示单击了那一个运算符.0表示"+",1表示"-",2表示"*",3表示"/"

static double m;//记忆的数字

public Counter()

{

gl1=new GridLayout(1,4,10,0);//实例化三个面板的布局

gl2=new GridLayout(4,1,0,15);

gl3=new GridLayout(4,5,10,15);

tf1=new JTextField(27);//显示屏

tf1.setHorizontalAlignment(JTextField.RIGHT);

tf1.setEnabled(false);

tf1.setText("0");

tf2=new TextField(10);//显示记忆的索引值

tf2.setEditable(false);

//实例化所有按钮、设置其前景色并注册监听器

b0=new Button("Backspace");

b0.setForeground(Color.red);

b0.addActionListener(new Bt());

b1=new Button("CE");

b1.setForeground(Color.red);

b1.addActionListener(new Bt());

b2=new Button("C");

b2.setForeground(Color.red);

b2.addActionListener(new Bt());

b3=new Button("MC");

b3.setForeground(Color.red);

b3.addActionListener(new Bt());

b4=new Button("MR");

b4.setForeground(Color.red);

b4.addActionListener(new Bt());

b5=new Button("MS");

b5.setForeground(Color.red);

b5.addActionListener(new Bt());

b6=new Button("M+");

b6.setForeground(Color.red);

b6.addActionListener(new Bt());

b7=new Button("7");

b7.setForeground(Color.blue);

b7.addActionListener(new Bt());

b8=new Button("8");

b8.setForeground(Color.blue);

b8.addActionListener(new Bt());

b9=new Button("9");

b9.setForeground(Color.blue);

b9.addActionListener(new Bt());

b10=new Button("/");

b10.setForeground(Color.red);

b10.addActionListener(new Bt());

b11=new Button("sqrt");

b11.setForeground(Color.blue);

b11.addActionListener(new Bt());

b12=new Button("4");

b12.setForeground(Color.blue);

b12.addActionListener(new Bt());

b13=new Button("5");

b13.setForeground(Color.blue);

b13.addActionListener(new Bt());

b14=new Button("6");

b14.setForeground(Color.blue);

b14.addActionListener(new Bt());

b15=new Button("*");

b15.setForeground(Color.red);

b15.addActionListener(new Bt());

b16=new Button("%");

b16.setForeground(Color.blue);

b16.addActionListener(new Bt());

b17=new Button("1");

b17.setForeground(Color.blue);

b17.addActionListener(new Bt());

b18=new Button("2");

b18.setForeground(Color.blue);

b18.addActionListener(new Bt());

b19=new Button("3");

b19.setForeground(Color.blue);

b19.addActionListener(new Bt());

b20=new Button("-");

b20.setForeground(Color.red);

b20.addActionListener(new Bt());

b21=new Button("1/X");

b21.setForeground(Color.blue);

b21.addActionListener(new Bt());

b22=new Button("0");

b22.setForeground(Color.blue);

b22.addActionListener(new Bt());

b23=new Button("+/-");

b23.setForeground(Color.blue);

b23.addActionListener(new Bt());

b24=new Button(".");

b24.setForeground(Color.blue);

b24.addActionListener(new Bt());

b25=new Button("+");

b25.setForeground(Color.red);

b25.addActionListener(new Bt());

b26=new Button("=");

b26.setForeground(Color.red);

b26.addActionListener(new Bt());

//实例化四个面板

p0=new Panel();

p1=new Panel();

p2=new Panel();

p3=new Panel();

//创建一个空字符串缓冲区

str=new StringBuffer();

//添加面板p0中的组件和设置其在框架中的位置和大小

p0.add(tf1);

p0.setBounds(10,25,300,40);

//添加面板p1中的组件和设置其在框架中的位置和大小

p1.setLayout(gl1);

p1.add(tf2);

p1.add(b0);

p1.add(b1);

p1.add(b2);

p1.setBounds(10,65,300,25);

//添加面板p2中的组件并设置其的框架中的位置和大小

p2.setLayout(gl2);

p2.add(b3);

p2.add(b4);

p2.add(b5);

p2.add(b6);

p2.setBounds(10,110,40,150);

//添加面板p3中的组件并设置其在框架中的位置和大小

p3.setLayout(gl3);//设置p3的布局

p3.add(b7);

p3.add(b8);

p3.add(b9);

p3.add(b10);

p3.add(b11);

p3.add(b12);

p3.add(b13);

p3.add(b14);

p3.add(b15);

p3.add(b16);

p3.add(b17);

p3.add(b18);

p3.add(b19);

p3.add(b20);

p3.add(b21);

p3.add(b22);

p3.add(b23);

p3.add(b24);

p3.add(b25);

p3.add(b26);

p3.setBounds(60,110,250,150);

//设置框架中的布局为空布局并添加4个面板

setLayout(null);

add(p0);

add(p1);

add(p2);

add(p3);

setResizable(false);//禁止调整框架的大小

//匿名类关闭窗口

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e1)

{

System.exit(0);

}

});

setBackground(Color.lightGray);

setBounds(100,100,320,280);

setVisible(true);

}

//构造监听器

class Bt implements ActionListener

{

public void actionPerformed(ActionEvent e2)

{

try{

if(e2.getSource()==b1)//选择"CE"清零

{

tf1.setText("0");//把显示屏清零

str.setLength(0);//清空字符串缓冲区以准备接收新的输入运算数

}

else if(e2.getSource()==b2)//选择"C"清零

{

tf1.setText("0");//把显示屏清零

str.setLength(0);

}

else if(e2.getSource()==b23)//单击"+/-"选择输入的运算数是正数还是负数

{

x=Double.parseDouble(tf1.getText().trim());

tf1.setText(""+(-x));

}

else if(e2.getSource()==b25)//单击加号按钮获得x的值和z的值并清空y的值

{

x=Double.parseDouble(tf1.getText().trim());

str.setLength(0);//清空缓冲区以便接收新的另一个运算数

y=0d;

z=0;

}

else if(e2.getSource()==b20)//单击减号按钮获得x的值和z的值并清空y的值

{

x=Double.parseDouble(tf1.getText().trim());

str.setLength(0);

y=0d;

z=1;

}

else if(e2.getSource()==b15)//单击乘号按钮获得x的值和z的值并清空y的值

{

x=Double.parseDouble(tf1.getText().trim());

str.setLength(0);

y=0d;

z=2;

}

else if(e2.getSource()==b10)//单击除号按钮获得x的值和z的值并空y的值

{

x=Double.parseDouble(tf1.getText().trim());

str.setLength(0);

y=0d;

z=3;

}

else if(e2.getSource()==b26)//单击等号按钮输出计算结果

{

str.setLength(0);

switch(z)

{

case 0 : tf1.setText(""+(x+y));break;

case 1 : tf1.setText(""+(x-y));break;

case 2 : tf1.setText(""+(x*y));break;

case 3 : tf1.setText(""+(x/y));break;

}

}

else if(e2.getSource()==b24)//单击"."按钮输入小数

{

if(tf1.getText().trim().indexOf(′.′)!=-1)//判断字符串中是否已经包含了小数点

{

}

else//如果没数点有小

{

if(tf1.getText().trim().equals("0"))//如果初时显示为0

{

str.setLength(0);

tf1.setText((str.append("0"+e2.getActionCommand())).toString());

}

else if(tf1.getText().trim().equals(""))//如果初时显示为空则不做任何操作

{

}

else

{

tf1.setText(str.append(e2.getActionCommand()).toString());

}

}

y=0d;

}

else if(e2.getSource()==b11)//求平方根

{

x=Double.parseDouble(tf1.getText().trim());

tf1.setText("数字格式异常");

if(x0)

tf1.setText("负数没有平方根");

else

tf1.setText(""+Math.sqrt(x));

str.setLength(0);

y=0d;

}

else if(e2.getSource()==b16)//单击了"%"按钮

{

x=Double.parseDouble(tf1.getText().trim());

tf1.setText(""+(0.01*x));

str.setLength(0);

y=0d;

}

else if(e2.getSource()==b21)//单击了"1/X"按钮

{

x=Double.parseDouble(tf1.getText().trim());

if(x==0)

{

tf1.setText("除数不能为零");

}

else

{

tf1.setText(""+(1/x));

}

str.setLength(0);

y=0d;

}

else if(e2.getSource()==b3)//MC为清除内存

{

m=0d;

tf2.setText("");

str.setLength(0);

}

else if(e2.getSource()==b4)//MR为重新调用存储的数据

{

if(tf2.getText().trim()!="")//有记忆数字

{

tf1.setText(""+m);

}

}

else if(e2.getSource()==b5)//MS为存储显示的数据

{

m=Double.parseDouble(tf1.getText().trim());

tf2.setText("M");

tf1.setText("0");

str.setLength(0);

}

else if(e2.getSource()==b6)//M+为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

{

m=m+Double.parseDouble(tf1.getText().trim());

}

else//选择的是其他的按钮

{

if(e2.getSource()==b22)//如果选择的是"0"这个数字键

{

if(tf1.getText().trim().equals("0"))//如果显示屏显示的为零不做操作

{

}

else

{

tf1.setText(str.append(e2.getActionCommand()).toString());

y=Double.parseDouble(tf1.getText().trim());

}

}

else if(e2.getSource()==b0)//选择的是“BackSpace”按钮

{

if(!tf1.getText().trim().equals("0"))//如果显示屏显示的不是零

{

if(str.length()!=1)

{

tf1.setText(str.delete(str.length()-1,str.length()).toString());//可能抛出字符串越界异常

}

else

{

tf1.setText("0");

str.setLength(0);

}

}

y=Double.parseDouble(tf1.getText().trim());

}

else//其他的数字键

{

tf1.setText(str.append(e2.getActionCommand()).toString());

y=Double.parseDouble(tf1.getText().trim());

}

}

}

catch(NumberFormatException e){

tf1.setText("数字格式异常");

}

catch(StringIndexOutOfBoundsException e){

tf1.setText("字符串索引越界");

}

}

}

public static void main(String args[])

{

new Counter();

}

}

你在JAVA的环境中运行一下。

这题目也是我的作业，我运行的了。

java中BigDecimal如何求余(即实现%的功能),求代码

java总BigDecimal求余的代码如下：

package com.qiu.lin.he;

import java.math.BigDecimal;

public class CeShi {

public static void main(String[] args) {

BigDecimal bg = BigDecimal.valueOf(11);

BigDecimal om2 = BigDecimal.valueOf(25);

System.out.println(om2.divideAndRemainder(bg)[1]);//取余

}

}

代码运行结果如下：

网页名称：java计算器取余代码 java中取余运算
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