求JAVA編寫(xiě)的 簡(jiǎn)易計(jì)算器程序，附上注釋

1、首先準(zhǔn)備好軟件即eclipse和java，下載安裝完成后打開(kāi)eclipse。

成都創(chuàng)新互聯(lián)專(zhuān)注于文山州網(wǎng)站建設(shè)服務(wù)及定制，我們擁有豐富的企業(yè)做網(wǎng)站經(jīng)驗(yàn)。 熱誠(chéng)為您提供文山州營(yíng)銷(xiāo)型網(wǎng)站建設(shè)，文山州網(wǎng)站制作、文山州網(wǎng)頁(yè)設(shè)計(jì)、文山州網(wǎng)站官網(wǎng)定制、微信小程序開(kāi)發(fā)服務(wù)，打造文山州網(wǎng)絡(luò)公司原創(chuàng)品牌,更為您提供文山州網(wǎng)站排名全網(wǎng)營(yíng)銷(xiāo)落地服務(wù)。

2、點(diǎn)擊左上角的file 新建一個(gè)project。

3、給project取一個(gè)名字，其他的選項(xiàng)都是默認(rèn)然后點(diǎn)擊finish。

4、接下來(lái)是新建一個(gè)class。

5、在給class取名字的時(shí)候注意用英文名的首字母要大寫(xiě)。完成后點(diǎn)擊finish。

6、這就是開(kāi)始寫(xiě)代碼的工作臺(tái)，將代碼寫(xiě)在綠字下。

7、這就是第一個(gè)hello world程序。

java寫(xiě)的計(jì)算器代碼，有注釋

//計(jì)算器

import java.awt.Button;

import java.awt.Color;

import java.awt.Frame;

import java.awt.GridLayout;

import java.awt.Panel;

import java.awt.TextField;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

public class M10 extends WindowAdapter implements MouseListener {

private String first;

private String second;

private String operator;

private Button zero = new Button("0");

private Button one = new Button("1");

private Button two = new Button("2");

private Button three = new Button("3");

private Button four = new Button("4");

private Button five = new Button("5");

private Button six = new Button("6");

private Button seven = new Button("7");

private Button eight = new Button("8");

private Button nine = new Button("9");

private Button decimal = new Button(".");

private Button equal = new Button("=");

private Button add = new Button("+");

private Button sub = new Button("-");

private Button mul = new Button("*");

private Button div = new Button("/");

private TextField input = new TextField();

private Button CE = new Button("CE");

private Button DEL = new Button("Del");

public static void main(String[] args){

new M10();

}

public M10(){

Frame f = new Frame("Calculator");

f.add("North", input);

Panel keys = new Panel();

f.add(keys, "Center");

keys.setLayout(new GridLayout(4, 4));

keys.add(seven);

keys.add(eight);

keys.add(nine);

keys.add(add);

keys.add(four);

keys.add(five);

keys.add(six);

keys.add(sub);

keys.add(one);

keys.add(two);

keys.add(three);

keys.add(mul);

keys.add(zero);

keys.add(decimal);

keys.add(equal);

keys.add(div);

zero.addMouseListener(this);

one.addMouseListener(this);

two.addMouseListener(this);

three.addMouseListener(this);

four.addMouseListener(this);

five.addMouseListener(this);

six.addMouseListener(this);

seven.addMouseListener(this);

eight.addMouseListener(this);

nine.addMouseListener(this);

add.addMouseListener(this);

sub.addMouseListener(this);

div.addMouseListener(this);

mul.addMouseListener(this);

equal.addMouseListener(this);

decimal.addMouseListener(this);

Panel addtionalPanel = new Panel();

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

addtionalPanel.add(CE);

addtionalPanel.add(DEL);

CE.setBackground(Color.green);

DEL.setBackground(Color.cyan);

CE.addMouseListener(this);

DEL.addMouseListener(this);

f.add("South", addtionalPanel);

f.addWindowListener(this);

f.setVisible(true);

f.setLocation(200, 300);

f.setSize(200, 200);

}

public void windowClosing(WindowEvent e){

System.exit(0);

}

public void mouseClicked(MouseEvent e){

Button btn = (Button)e.getSource();

String key = btn.getActionCommand().trim();

if(btn == one || btn == two || btn == three || btn == zero || btn == four || btn == five || btn == six || btn == seven || btn == eight || btn == nine){

if(isBlank(operator)){

if(isBlank(first)){

first = key;

}

else{

first += key;

}

input.setText(first);

}

else{

if(isBlank(second)){

second = key;

}

else{

second += key;

}

input.setText(second);

}

}

else if(btn == decimal){

if(isBlank(operator)){

if(isBlank(first)){

first = "0.";

input.setText(first);

}

else{

if(first.indexOf(".") == -1){

first += ".";

input.setText(first);

}

}

}

else{

if(isBlank(second)){

second = "0.";

input.setText(second);

}

else{

if(second.indexOf(".") == -1){

second += ".";

input.setText(second);

}

}

}

}

else if(btn == equal){

if(!isBlank(second) !isBlank(first) !isBlank(operator)){

double result = 0.0D;

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

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

}

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

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

}

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

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

}

else if(operator.equals("/")){

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

}

int value = (int)Math.round(result);

if(value == result){

input.setText(String.valueOf(value));

}

else{

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

}

first = String.valueOf(result);

second = null;

operator = null;

}

}

else if(btn == add || btn == sub || btn == div || btn == mul){

if(!isBlank(first)){

if(!isBlank(operator) !isBlank(second)){

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

first = String.valueOf(Double.parseDouble(first) + Double.parseDouble(second));

}

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

first = String.valueOf(Double.parseDouble(first) - Double.parseDouble(second));

}

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

first = String.valueOf(Double.parseDouble(first) * Double.parseDouble(second));

}

else if(operator.equals("/")){

first = String.valueOf(Double.parseDouble(first) / Double.parseDouble(second));

}

second = null;

}

operator = key;

}

}

else if(btn == CE){

first = null;

second = null;

operator = null;

input.setText(null);

}

else if(btn == DEL){

if(isBlank(operator)){

if(!isBlank(first)){

first = first.substring(0, first.length() -1);

input.setText(first);

}

}

else{

if(!isBlank(second)){

second = second.substring(0, second.length() -1);

input.setText(second);

}

}

}

}

private boolean isBlank(String str){

return str == null || str.trim().equals("");

}

public void mousePressed(MouseEvent e){}

public void mouseReleased(MouseEvent e){}

public void mouseEntered(MouseEvent e){}

public void mouseExited(MouseEvent e){}

}

java 計(jì)算器代碼帶括號(hào) 求注釋

//引入各種類(lèi)文件

import?java.awt.Button;

import?java.awt.Color;

import?java.awt.FlowLayout;

import?java.awt.Font;

import?java.awt.Frame;

import?java.awt.GridLayout;

import?java.awt.Panel;

import?java.awt.TextField;

import?java.awt.event.ActionEvent;

import?java.awt.event.ActionListener;

//定義JsqFrame繼承Frame

class?JsqFrame?extends?Frame?{

double?d1,?d2;??//定義兩個(gè)double類(lèi)型的變量

int?op?=?-1;??//定義兩個(gè)int類(lèi)型的變量

static?TextField?tf;//定義靜態(tài)對(duì)象TextField

CalPanelL?p1;??//定義CalPanelL對(duì)象

//?Constructor構(gòu)造方法

JsqFrame()?{

//以下設(shè)置屬性

super("計(jì)算器");

setLayout(new?FlowLayout());

setResizable(false);

setSize(250,?250);

tf?=?new?TextField(18);

tf.setEditable(false);

tf.setBackground(Color.lightGray);

tf.setForeground(Color.red);

tf.setFont(new?Font("Arial",?Font.BOLD,?16));

add(tf);

p1?=?new?CalPanelL();

add(p1);

setVisible(true);

//?addWindowListener(new?Wclose());

}

//添加按鈕繼承Button類(lèi)

class?CalButton?extends?Button?{

CalButton(String?s)?{

//設(shè)置按鈕屬性

super(s);

setBackground(Color.WHITE);?//設(shè)置顏色為白色

}

}

//定義顯示器繼承Panel類(lèi)

class?CalPanelL?extends?Panel?{

CalButton?a,?c,?b0,?b1,?b2,?b3,?b4,?b5,?b6,?b7,?b8,?b9,?bPN,?bPoint,

bAdd,?bSub,?bMul,?bDiv,?bL,?bR,?bLn,?bEqual,?bCE,?bQuit;

CalPanelL()?{

//設(shè)置顯示器的屬性

setLayout(new?GridLayout(6,?4));

setFont(new?Font("TimesRoman",?Font.BOLD,?16));

a?=?new?CalButton("");

c?=?new?CalButton("");

b0?=?new?CalButton("0");

b1?=?new?CalButton("1");

b2?=?new?CalButton("2");

b3?=?new?CalButton("3");

b4?=?new?CalButton("4");

b5?=?new?CalButton("5");

b6?=?new?CalButton("6");

b7?=?new?CalButton("7");

b8?=?new?CalButton("8");

b9?=?new?CalButton("9");

bPN?=?new?CalButton("+/-");

bPoint?=?new?CalButton(".");

//?設(shè)置按鈕

bAdd?=?new?CalButton("+");

bSub?=?new?CalButton("-");

bMul?=?new?CalButton("*");

bDiv?=?new?CalButton("/");

bL?=?new?CalButton("(");

bR?=?new?CalButton(")");

bLn?=?new?CalButton("ln");

bEqual?=?new?CalButton("=");

bCE?=?new?CalButton("CE");

bQuit?=?new?CalButton("退出");

//?加入按鈕

add(a);

add(c);

add(bCE);

bCE.addActionListener(new?PressBCE());

add(bQuit);

bQuit.addActionListener(new?PressBQuit());

add(b7);

b7.addActionListener(new?PressB7());

add(b8);

b8.addActionListener(new?PressB8());

add(b9);

b9.addActionListener(new?PressB9());

add(bDiv);

bDiv.addActionListener(new?PressBDiv());

add(b4);

b4.addActionListener(new?PressB4());

add(b5);

b5.addActionListener(new?PressB5());

add(b6);

b6.addActionListener(new?PressB6());

add(bMul);

bMul.addActionListener(new?PressBMul());

add(b1);

b1.addActionListener(new?PressB1());

add(b2);

b2.addActionListener(new?PressB2());

add(b3);

b3.addActionListener(new?PressB3());

add(bSub);

bSub.addActionListener(new?PressBSub());

add(b0);

b0.addActionListener(new?PressB0());

add(bPoint);

bPoint.addActionListener(new?PressBPoint());

add(bPN);

bPN.addActionListener(new?PressBPN());

;

add(bAdd);

bAdd.addActionListener(new?PressBAdd());

add(bL);

bL.addActionListener(new?PressBL());

add(bR);

bR.addActionListener(new?PressBR());

add(bLn);

bLn.addActionListener(new?PressBLn());

add(bEqual);

bEqual.addActionListener(new?PressBEqual());

}

}

//定義PressBAdd實(shí)現(xiàn)ActionListener

//大體的意思是按計(jì)算機(jī)按鍵的時(shí)出發(fā)的時(shí)間，設(shè)置按鍵的監(jiān)聽(tīng)[加號(hào)的監(jiān)聽(tīng)事件]

class?PressBAdd?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

try?{

String?d1?=?tf.getText();

op?=?0;

tf.setText(d1?+?"+");

}?catch?(Exception?ee)?{

}

}

}

//定義PressBSub實(shí)現(xiàn)ActionListener

//大體的意思是按計(jì)算機(jī)按鍵的時(shí)出發(fā)的時(shí)間，設(shè)置按鍵的監(jiān)聽(tīng)[減號(hào)的監(jiān)聽(tīng)事件]

class?PressBSub?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

try?{

String?d1?=?tf.getText();

op?=?1;

tf.setText(d1?+?"-");

}?catch?(Exception?ee)?{

}

}

}

//定義PressBMul實(shí)現(xiàn)ActionListener

//大體的意思是按計(jì)算機(jī)按鍵的時(shí)出發(fā)的時(shí)間，設(shè)置按鍵的監(jiān)聽(tīng)[乘號(hào)的監(jiān)聽(tīng)事件]

class?PressBMul?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

try?{

String?d1?=?tf.getText();

op?=?2;

tf.setText(d1?+?"*");

}?catch?(Exception?ee)?{

}

}

}

//定義PressBDiv實(shí)現(xiàn)ActionListener

//大體的意思是按計(jì)算機(jī)按鍵的時(shí)出發(fā)的時(shí)間，設(shè)置按鍵的監(jiān)聽(tīng)[除號(hào)的監(jiān)聽(tīng)事件]

class?PressBDiv?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

try?{

String?d1?=?tf.getText();

op?=?3;

tf.setText(d1?+?"/");

}?catch?(Exception?ee)?{

}

}

}

//定義PressBL實(shí)現(xiàn)ActionListener

//大體的意思是按計(jì)算機(jī)按鍵的時(shí)出發(fā)的時(shí)間，設(shè)置按鍵的監(jiān)聽(tīng)[向左鍵的監(jiān)聽(tīng)事件]

class?PressBL?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

try?{

String?d1?=?tf.getText();

op?=?3;

tf.setText(d1?+?"(");

}?catch?(Exception?ee)?{

}

}

}

//定義PressBR實(shí)現(xiàn)ActionListener

//大體的意思是按計(jì)算機(jī)按鍵的時(shí)出發(fā)的時(shí)間，設(shè)置按鍵的監(jiān)聽(tīng)[向右鍵的監(jiān)聽(tīng)事件]

class?PressBR?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

try?{

String?d1?=?tf.getText();

op?=?3;

tf.setText(d1?+?")");

}?catch?(Exception?ee)?{

}

}

}

//定義PressBEqual實(shí)現(xiàn)ActionListener

//大體的意思是按計(jì)算機(jī)按鍵的時(shí)出發(fā)的時(shí)間，設(shè)置按鍵的監(jiān)聽(tīng)[等號(hào)的監(jiān)聽(tīng)事件]

class?PressBEqual?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

try?{

Jsq?jsq?=?new?Jsq();

String?s?=?tf.getText();

System.out.println(s);

while?(s.indexOf("(")?+?1??0??s.indexOf(")")??0)?{

String?s1?=?jsq.caculateHigh(s);

System.out.println(s1);

s?=?s1;

}

String?str?=?jsq.cacluteMain(s);

System.out.println(str);

tf.setText(String.valueOf(str));

}?catch?(Exception?ee)?{

}

}

}

/*

*?批量寫(xiě)吧

*?以下是按1、2、3等等的監(jiān)聽(tīng)事件

*?還有清零的等等監(jiān)聽(tīng)事件

*/

class?PressBLn?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

try?{

double?x?=?Double.parseDouble(tf.getText());

double?y;

y?=?Math.log10(x);

tf.setText(y?+?"");

}?catch?(Exception?ee)?{

}

}

}

class?PressBCE?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

tf.setText("");

}

}

class?PressBPN?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

try?{

String?text?=?tf.getText();

if?(text?!=?"")?{

if?(text.charAt(0)?==?'-')

tf.setText(text.substring(1));

else?if?(text.charAt(0)?=?'0'??text.charAt(0)?=?'9')

tf.setText("-"?+?text.substring(0));

else?if?(text.charAt(0)?==?'.')

tf.setText("-0"?+?text.substring(0));

}

}?catch?(Exception?ee)?{

}

}

}

class?PressBPoint?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

String?text?=?tf.getText();

if?(text.lastIndexOf(".")?==?-1)

tf.setText(text?+?".");

}

}

class?PressB0?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

String?text?=?tf.getText();

tf.setText(text?+?"0");

}

}

class?PressB1?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

String?text?=?tf.getText();

tf.setText(text?+?"1");

}

}

class?PressB2?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

String?text?=?tf.getText();

tf.setText(text?+?"2");

}

}

class?PressB3?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

String?text?=?tf.getText();

tf.setText(text?+?"3");

}

}

class?PressB4?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

String?text?=?tf.getText();

tf.setText(text?+?"4");

}

}

class?PressB5?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

String?text?=?tf.getText();

tf.setText(text?+?"5");

}

}

class?PressB6?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

String?text?=?tf.getText();

tf.setText(text?+?"6");

}

}

class?PressB7?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

String?text?=?tf.getText();

tf.setText(text?+?"7");

}

}

class?PressB8?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

String?text?=?tf.getText();

tf.setText(text?+?"8");

}

}

class?PressB9?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

String?text?=?tf.getText();

tf.setText(text?+?"9");

}

}

class?PressBQuit?implements?ActionListener?{

public?void?actionPerformed(ActionEvent?e)?{

System.exit(0);

}

}

public?void?Js()?{

String?text?=?tf.getText();

tf.setText(text);

}

}

本文標(biāo)題：java計(jì)算器代碼要注釋,java計(jì)算器代碼要注釋嘛
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