我想要一個(gè)JAVA邊的計(jì)算器的原碼并有代碼說(shuō)明文檔

import javax.swing.*;

成都創(chuàng)新互聯(lián)堅(jiān)持“要么做到，要么別承諾”的工作理念，服務(wù)領(lǐng)域包括：做網(wǎng)站、成都網(wǎng)站設(shè)計(jì)、企業(yè)官網(wǎng)、英文網(wǎng)站、手機(jī)端網(wǎng)站、網(wǎng)站推廣等服務(wù)，滿足客戶于互聯(lián)網(wǎng)時(shí)代的柯橋網(wǎng)站設(shè)計(jì)、移動(dòng)媒體設(shè)計(jì)的需求，幫助企業(yè)找到有效的互聯(lián)網(wǎng)解決方案。努力成為您成熟可靠的網(wǎng)絡(luò)建設(shè)合作伙伴！

import java.awt.*;

import java.awt.event.*;

import java.math.*;

public class HomeWork61 extends JFrame

{

JTextField memory=new JTextField();

JTextField number=new JTextField();

String before=new String();//存儲(chǔ)沒(méi)輸入完的數(shù)

String first=new String();//第一個(gè)數(shù)

String second=new String();//第二個(gè)數(shù)

String symbol=new String();//存儲(chǔ)運(yùn)算符號(hào)

String remember=new String();

int point;//點(diǎn)過(guò)小數(shù)點(diǎn)否

class buttonlistener implements ActionListener

{

public void actionPerformed(ActionEvent e)

{

String s=e.getActionCommand();

if(s=="1"||s=="2"||s=="3"||s=="4"||s=="5"||s=="6"||s=="7"||s=="8"||s=="9"||s=="0"||s==".")

{

if(s!=".")

before=before+s;

else

if(point==0)

{

before=before+s;

point=1;

}

number.setText(before);

}

else

if(s=="+"||s=="-"||s=="*"||s=="/")

{

if(first=="")

first=before;

else

{

second=before;

String result=new String();

double finalnumber=0;

if(symbol=="+")

finalnumber=Double.parseDouble(first)+Double.parseDouble(second);

if(symbol=="-")

finalnumber=Double.parseDouble(first)-Double.parseDouble(second);

if(symbol=="*")

finalnumber=Double.parseDouble(first)*Double.parseDouble(second);

if(symbol=="/")

finalnumber=Double.parseDouble(first)/Double.parseDouble(second);

if(symbol=="=")

finalnumber=Double.parseDouble(first);

result=result.valueOf(finalnumber);

number.setText(result);

first=result;

point=0;

}

symbol=s;

before="";

point=0;

}

else

if(s=="=")

{

second=before;

before="";

String result=new String();

double finalnumber=0;

if(symbol=="+")

finalnumber=Double.parseDouble(first)+Double.parseDouble(second);

if(symbol=="-")

finalnumber=Double.parseDouble(first)-Double.parseDouble(second);

if(symbol=="*")

finalnumber=Double.parseDouble(first)*Double.parseDouble(second);

if(symbol=="/")

finalnumber=Double.parseDouble(first)/Double.parseDouble(second);

result=result.valueOf(finalnumber);

number.setText(result);

symbol="=";

first=result;

point=0;

}

if(s=="sin"||s=="cos"||s=="tan")//三角函數(shù)

{

if(first=="")

first=before;

before="";

String result=new String();

double finalnumber=0;

if(s=="sin")

finalnumber=Math.sin(Double.parseDouble(first));

if(s=="cos")

finalnumber=Math.cos(Double.parseDouble(first));

if(s=="tan")

finalnumber=Math.tan(Double.parseDouble(first));

result=result.valueOf(finalnumber);

number.setText(result);

first=result;

symbol="=";

point=0;

}

if(s=="+/-")//正負(fù)轉(zhuǎn)換

{

if(first=="")

{

first=before;

before="";

String result=new String();

double finalnumber=Double.parseDouble(first);

finalnumber=-finalnumber;

result=result.valueOf(finalnumber);

number.setText(result);

first=result;

symbol="=";

point=0;

}

else

{

String result=new String();

double finalnumber=Double.parseDouble(before);

finalnumber=-finalnumber;

result=result.valueOf(finalnumber);

number.setText(result);

before=result;

point=0;

}

}

if(s=="M+")

{

if(before!="")

{

if(remember=="")

remember=before;

else

{

double finalnumber=Double.parseDouble(remember)+Double.parseDouble(before);

remember=remember.valueOf(finalnumber);

}

before="";

point=0;

memory.setText("M");

}

}

if(s=="MR")

{

if(remember!="")

number.setText(remember);

else

number.setText("0.");

}

if(s=="MC")

{

memory.setText("");

remember="";

}

if(s=="MS")

{

if(before!="")

{

remember=before;

before="";

point=0;

memory.setText("M");

}

}

if(s=="C")//清除屏幕

{

before="";

first="";

second="";

symbol="";

point=0;

number.setText("0.");

}

}

}

public static void main(String[] args)

{

HomeWork61 myhomework=new HomeWork61("calculator");//生成對(duì)象

myhomework.setSize(400,200);//設(shè)置大小

myhomework.setVisible(true);//設(shè)置成可見(jiàn)

}

public HomeWork61(String title)

{

super(title);//設(shè)置標(biāo)題

Container cp = getContentPane();

JPanel button=new JPanel();

JPanel result=new JPanel();

remember="";

before="";

first="";

second="";

symbol="";

point=0;

JButton c=new JButton();

button.setLayout(new GridLayout(4,6));

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

JButton[] btn=new JButton[24];

btn[0]=new JButton("sin");

btn[1]=new JButton("MC");

btn[2]=new JButton("0");

btn[3]=new JButton("1");

btn[4]=new JButton("2");

btn[5]=new JButton("+");

btn[6]=new JButton("cos");

btn[7]=new JButton("MR");

btn[8]=new JButton("3");

btn[9]=new JButton("4");

btn[10]=new JButton("5");

btn[11]=new JButton("-");

btn[12]=new JButton("tan");

btn[13]=new JButton("MS");

btn[14]=new JButton("6");

btn[15]=new JButton("7");

btn[16]=new JButton("8");

btn[17]=new JButton("*");

btn[18]=new JButton("+/-");

btn[19]=new JButton("M+");

btn[20]=new JButton("9");

btn[21]=new JButton(".");

btn[22]=new JButton("=");

btn[23]=new JButton("/");

c=new JButton("C");

for(int i=0;i24;i++)

{

btn[i].addActionListener(new buttonlistener());

button.add(btn[i]);

}

c.addActionListener(new buttonlistener());

result.add(BorderLayout.EAST,memory);

result.add(BorderLayout.CENTER,c);

result.add(BorderLayout.WEST,number);

cp.add(BorderLayout.NORTH,result);

cp.add(BorderLayout.SOUTH,button);

number.setText("0.");

}

}

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

import java.math.*;

public class HomeWork61 extends JFrame

{

JTextField memory=new JTextField();

JTextField number=new JTextField();

String before=new String();//存儲(chǔ)沒(méi)輸入完的數(shù)

String first=new String();//第一個(gè)數(shù)

String second=new String();//第二個(gè)數(shù)

String symbol=new String();//存儲(chǔ)運(yùn)算符號(hào)

String remember=new String();

int point;//點(diǎn)過(guò)小數(shù)點(diǎn)否

class buttonlistener implements ActionListener

{

public void actionPerformed(ActionEvent e)

{

String s=e.getActionCommand();

if(s=="1"||s=="2"||s=="3"||s=="4"||s=="5"||s=="6"||s=="7"||s=="8"||s=="9"||s=="0"||s==".")

{

if(s!=".")

before=before+s;

else

if(point==0)

{

before=before+s;

point=1;

}

number.setText(before);

}

else

if(s=="+"||s=="-"||s=="*"||s=="/")

{

if(first=="")

first=before;

else

{

second=before;

String result=new String();

double finalnumber=0;

if(symbol=="+")

finalnumber=Double.parseDouble(first)+Double.parseDouble(second);

if(symbol=="-")

finalnumber=Double.parseDouble(first)-Double.parseDouble(second);

if(symbol=="*")

finalnumber=Double.parseDouble(first)*Double.parseDouble(second);

if(symbol=="/")

finalnumber=Double.parseDouble(first)/Double.parseDouble(second);

if(symbol=="=")

finalnumber=Double.parseDouble(first);

result=result.valueOf(finalnumber);

number.setText(result);

first=result;

point=0;

}

symbol=s;

before="";

point=0;

}

else

if(s=="=")

{

second=before;

before="";

String result=new String();

double finalnumber=0;

if(symbol=="+")

finalnumber=Double.parseDouble(first)+Double.parseDouble(second);

if(symbol=="-")

finalnumber=Double.parseDouble(first)-Double.parseDouble(second);

if(symbol=="*")

finalnumber=Double.parseDouble(first)*Double.parseDouble(second);

if(symbol=="/")

finalnumber=Double.parseDouble(first)/Double.parseDouble(second);

result=result.valueOf(finalnumber);

number.setText(result);

symbol="=";

first=result;

point=0;

}

if(s=="sin"||s=="cos"||s=="tan")//三角函數(shù)

{

if(first=="")

first=before;

before="";

String result=new String();

double finalnumber=0;

if(s=="sin")

finalnumber=Math.sin(Double.parseDouble(first));

if(s=="cos")

finalnumber=Math.cos(Double.parseDouble(first));

if(s=="tan")

finalnumber=Math.tan(Double.parseDouble(first));

result=result.valueOf(finalnumber);

number.setText(result);

first=result;

symbol="=";

point=0;

}

if(s=="+/-")//正負(fù)轉(zhuǎn)換

{

if(first=="")

{

first=before;

before="";

String result=new String();

double finalnumber=Double.parseDouble(first);

finalnumber=-finalnumber;

result=result.valueOf(finalnumber);

number.setText(result);

first=result;

symbol="=";

point=0;

}

else

{

String result=new String();

double finalnumber=Double.parseDouble(before);

finalnumber=-finalnumber;

result=result.valueOf(finalnumber);

number.setText(result);

before=result;

point=0;

}

}

if(s=="M+")

{

if(before!="")

{

if(remember=="")

remember=before;

else

{

double finalnumber=Double.parseDouble(remember)+Double.parseDouble(before);

remember=remember.valueOf(finalnumber);

}

before="";

point=0;

memory.setText("M");

}

}

if(s=="MR")

{

if(remember!="")

number.setText(remember);

else

number.setText("0.");

}

if(s=="MC")

{

memory.setText("");

remember="";

}

if(s=="MS")

{

if(before!="")

{

remember=before;

before="";

point=0;

memory.setText("M");

}

}

if(s=="C")//清除屏幕

{

before="";

first="";

second="";

symbol="";

point=0;

number.setText("0.");

}

}

}

public static void main(String[] args)

{

HomeWork61 myhomework=new HomeWork61("calculator");//生成對(duì)象

myhomework.setSize(400,200);//設(shè)置大小

myhomework.setVisible(true);//設(shè)置成可見(jiàn)

}

public HomeWork61(String title)

{

super(title);//設(shè)置標(biāo)題

Container cp = getContentPane();

JPanel button=new JPanel();

JPanel result=new JPanel();

remember="";

before="";

first="";

second="";

symbol="";

point=0;

JButton c=new JButton();

button.setLayout(new GridLayout(4,6));

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

JButton[] btn=new JButton[24];

btn[0]=new JButton("sin");

btn[1]=new JButton("MC");

btn[2]=new JButton("0");

btn[3]=new JButton("1");

btn[4]=new JButton("2");

btn[5]=new JButton("+");

btn[6]=new JButton("cos");

btn[7]=new JButton("MR");

btn[8]=new JButton("3");

btn[9]=new JButton("4");

btn[10]=new JButton("5");

btn[11]=new JButton("-");

btn[12]=new JButton("tan");

btn[13]=new JButton("MS");

btn[14]=new JButton("6");

btn[15]=new JButton("7");

btn[16]=new JButton("8");

btn[17]=new JButton("*");

btn[18]=new JButton("+/-");

btn[19]=new JButton("M+");

btn[20]=new JButton("9");

btn[21]=new JButton(".");

btn[22]=new JButton("=");

btn[23]=new JButton("/");

c=new JButton("C");

for(int i=0;i24;i++)

Java：Integer.bitCount()原碼求解

只是一種算法，就像貼吧里經(jīng)常有，隨機(jī)選個(gè)數(shù)，然后把這個(gè)數(shù)加上多少減去多少還有一些特殊步驟，然后那個(gè)樓主就說(shuō)你得到的一定是某個(gè)數(shù)。用數(shù)學(xué)的方法證明一下就可以了

java中如何獲得某一整數(shù)的某一個(gè)字節(jié)的數(shù)據(jù)，例如8,他的二進(jìn)制原碼00000001 0000000，

getAnyBinaryString(int num,int start,int end){ //i是你要取的某個(gè)字節(jié)，按數(shù)值實(shí)際存儲(chǔ)大小來(lái)賦值能取的范圍0~64表示8位到64位的可取字節(jié)即byte到long，如數(shù)值num實(shí)際只用了一字節(jié)存那么start=0,end=8也就是說(shuō)你只能取到num的第1個(gè)字節(jié)，其他位都是1取出來(lái)無(wú)用不是真值，環(huán)境默認(rèn)數(shù)值為int32位0~8|8~16|16~24|24~32(表示0~3的某個(gè)字節(jié))以實(shí)際數(shù)值存儲(chǔ)所占字節(jié)大小為準(zhǔn)，你可事先算下數(shù)值是幾位表示；

return (num=0?Integer.toBinaryString(num):Integer.toBinaryString(~num+1)).substring(start, end);

}

文章題目：java求整數(shù)原碼代碼 整數(shù)原碼的計(jì)算方法
本文地址：http://chinadenli.net/article18/hppigp.html

成都網(wǎng)站建設(shè)公司_創(chuàng)新互聯(lián)，為您提供企業(yè)網(wǎng)站制作、網(wǎng)站制作、手機(jī)網(wǎng)站建設(shè)、外貿(mào)建站、虛擬主機(jī)、營(yíng)銷(xiāo)型網(wǎng)站建設(shè)

廣告

聲明：本網(wǎng)站發(fā)布的內(nèi)容（圖片、視頻和文字）以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主，如果涉及侵權(quán)請(qǐng)盡快告知，我們將會(huì)在第一時(shí)間刪除。文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng)，如需處理請(qǐng)聯(lián)系客服。電話：028-86922220；郵箱：631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載，或轉(zhuǎn)載時(shí)需注明來(lái)源： 創(chuàng)新互聯(lián)