頁(yè)面計(jì)算器的java代碼 javagui界面設(shè)計(jì)計(jì)算器

急求！！！如何用java程序代碼實(shí)現(xiàn)計(jì)算器界面

package?jisuanqi_new;

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import?java.awt.*;

import?java.awt.event.*;

public?class?JiSuanQi_new?implements?ActionListener

{

Panel?p1;//聲明面板p1

TextField?t1;//聲明文本行t1

String[]?label?=?{"7","8","9","/","4","5","6","*","1","2","3","-","0",".","=","+"};//聲明標(biāo)簽數(shù)組label1存放按鈕上的標(biāo)簽

Button[]?b;//聲明按鈕數(shù)組存放16個(gè)按鈕

private?int?i;//聲明i以備后用

private?String?op1?=?"0";//運(yùn)算數(shù)備用

private?String?operator?=?"+";//運(yùn)算符備用

private?boolean?append?=?false;//備用

public?JiSuanQi_new()//構(gòu)造方法

{

t1=new?TextField();//初始化文本行t1

b?=?new?Button[label.length];//初始化按鈕數(shù)組b

p1=new?Panel();//初始化面板p1

p1.setLayout(new?GridLayout(4,4,4,4));//使面板選擇網(wǎng)格布局管理器以備儲(chǔ)存16個(gè)按鈕（4行4列）

for(int?i=0;ib.length;i++)//利用for循環(huán)把標(biāo)簽放在按鈕上，使每個(gè)按鈕添加事件監(jiān)聽(tīng)器，在面板p1上添加上16個(gè)按鈕

{

b[i]?=?new?Button(label[i]);//把標(biāo)簽依次放在16個(gè)按鈕上

b[i].addActionListener(this);//使每個(gè)按鈕添加動(dòng)作事件監(jiān)聽(tīng)器

p1.add(b[i]);?//分別將按鈕添加到面板p1上

}

Frame?f=new?Frame("計(jì)算器1.0");//初始化窗口f,起名字計(jì)算器1.0

f.setLayout(new?BorderLayout());//為窗口選擇邊界布局管理器

f.add(BorderLayout.NORTH,t1);//把文本行他添加到窗口的北部

f.add(BorderLayout.CENTER,p1);//把面吧p1添加到窗口的中間

f.addWindowListener(new?WindowAdapter(){//給窗口f添加窗口事件監(jiān)聽(tīng)器

public?void?windowClosing(WindowEvent?eve){//運(yùn)行窗口關(guān)閉方法

System.exit(0);//退出程序

}

});

f.setSize(250,?250);//設(shè)置窗口大小

f.setLocation(200,200);

f.setVisible(true);//顯示窗口

}

public?static?void?main(String?args[])

{

new?JiSuanQi_new();?//調(diào)用構(gòu)造方法

}

public?void?actionPerformed(ActionEvent?ae)

{//按鈕被操作發(fā)生

String?comm?=?ae.getActionCommand();//返回與此動(dòng)作相關(guān)的命令字符串，即：使用者第一次點(diǎn)擊的按鈕是什么。

if("0123456789".indexOf(comm)!=-1)//如果相關(guān)命令字符串為0~9之間的數(shù)字則執(zhí)行

{

if(append){

String?temp?=?t1.getText();//新數(shù)字

t1.setText(temp+comm);

}else{?????????????????????????//因?yàn)榇藭r(shí)append為false執(zhí)行這個(gè)

t1.setText(comm);?//將文本行t1設(shè)置為相關(guān)命令字符串（你按中的按鈕代碼）

append?=??true;//此時(shí)append=true若繼續(xù)按按鈕若繼續(xù)按數(shù)字的話1.第一次的按話不會(huì)改變2.非第一次按得話會(huì)覆蓋之前按得數(shù)字（即缺點(diǎn)：只能進(jìn)行單個(gè)數(shù)字的計(jì)算）

}

}

else?if(("+-*/".indexOf(comm)!=-1))//如果相關(guān)命令字符串為+-*/之間的數(shù)字則執(zhí)行

{

//保存

//t1.setText(comm);

op1?=?t1.getText();//把第一個(gè)數(shù)賦值給op1

operator?=?comm;//把命令字符串賦值給operator

append?=?false;//此時(shí)append為false即若繼續(xù)按按鈕若按數(shù)字的話將重復(fù)上面的動(dòng)作，按符號(hào)的話將覆蓋之前的符號(hào)

}

else?if("=".equals(comm))//如果按的是=號(hào)，則按條件進(jìn)行下面的運(yùn)算

{

String?op2?=?t1.getText();//op2第二個(gè)數(shù)

double?d1?=?Double.parseDouble(op1);

double?d2?=?Double.parseDouble(op2);

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

d1?=?d1?+?d2?;

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

d1?=?d1?-?d2;

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

d1?=?d1?*?d2;

}else?{

d1?=?d1?/?d2;

}

t1.setText(d1+"");//顯示計(jì)算結(jié)果

append?=?false;

}

else?if(".".equals(comm))//若是.號(hào)繼續(xù)按

{

String?temp?=?t1.getText();

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

t1.setText(temp+".");

append?=?true;

}

}

}

}

求一計(jì)算器java代碼，最好簡(jiǎn)單一點(diǎn)（圖形界面）

import java.awt.*;

import java.awt.event.*;

import java.lang.*;

import javax.swing.*;

public class Counter extends Frame

{

//聲明三個(gè)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;//顯示屏所顯示的字符串

double x,y;//x和y都是運(yùn)算數(shù)

int z;//Z表示單擊了那一個(gè)運(yùn)算符.0表示"+",1表示"-",2表示"*",3表示"/"

static double m;//記憶的數(shù)字

public Counter()

{

gl1=new GridLayout(1,4,10,0);//實(shí)例化三個(gè)面板的布局

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

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

tf1=new JTextField(27);//顯示屏

tf1.setHorizontalAlignment(JTextField.RIGHT);

tf1.setEnabled(false);

tf1.setText("0");

tf2=new TextField(10);//顯示記憶的索引值

tf2.setEditable(false);

//實(shí)例化所有按鈕、設(shè)置其前景色并注冊(cè)監(jiān)聽(tīng)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());

//實(shí)例化四個(gè)面板

p0=new Panel();

p1=new Panel();

p2=new Panel();

p3=new Panel();

//創(chuàng)建一個(gè)空字符串緩沖區(qū)

str=new StringBuffer();

//添加面板p0中的組件和設(shè)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中的組件和設(shè)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中的組件并設(shè)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中的組件并設(shè)置其在框架中的位置和大小

p3.setLayout(gl3);//設(shè)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);

//設(shè)置框架中的布局為空布局并添加4個(gè)面板

setLayout(null);

add(p0);

add(p1);

add(p2);

add(p3);

setResizable(false);//禁止調(diào)整框架的大小

//匿名類關(guān)閉窗口

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e1)

{

System.exit(0);

}

});

setBackground(Color.lightGray);

setBounds(100,100,320,280);

setVisible(true);

}

//構(gòu)造監(jiān)聽(tīng)器

class Bt implements ActionListener

{

public void actionPerformed(ActionEvent e2)

{

try{

if(e2.getSource()==b1)//選擇"CE"清零

{

tf1.setText("0");//把顯示屏清零

str.setLength(0);//清空字符串緩沖區(qū)以準(zhǔn)備接收新的輸入運(yùn)算數(shù)

}

else if(e2.getSource()==b2)//選擇"C"清零

{

tf1.setText("0");//把顯示屏清零

str.setLength(0);

}

else if(e2.getSource()==b23)//單擊"+/-"選擇輸入的運(yùn)算數(shù)是正數(shù)還是負(fù)數(shù)

{

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

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

}

else if(e2.getSource()==b25)//單擊加號(hào)按鈕獲得x的值和z的值并清空y的值

{

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

str.setLength(0);//清空緩沖區(qū)以便接收新的另一個(gè)運(yùn)算數(shù)

y=0d;

z=0;

}

else if(e2.getSource()==b20)//單擊減號(hào)按鈕獲得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)//單擊乘號(hào)按鈕獲得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)//單擊除號(hào)按鈕獲得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)//單擊等號(hào)按鈕輸出計(jì)算結(jié)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)//單擊"."按鈕輸入小數(shù)

{

if(tf1.getText().trim().indexOf(′.′)!=-1)//判斷字符串中是否已經(jīng)包含了小數(shù)點(diǎn)

{

}

else//如果沒(méi)數(shù)點(diǎn)有小

{

if(tf1.getText().trim().equals("0"))//如果初時(shí)顯示為0

{

str.setLength(0);

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

}

else if(tf1.getText().trim().equals(""))//如果初時(shí)顯示為空則不做任何操作

{

}

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("數(shù)字格式異常");

if(x0)

tf1.setText("負(fù)數(shù)沒(méi)有平方根");

else

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

str.setLength(0);

y=0d;

}

else if(e2.getSource()==b16)//單擊了"%"按鈕

{

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

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

str.setLength(0);

y=0d;

}

else if(e2.getSource()==b21)//單擊了"1/X"按鈕

{

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

if(x==0)

{

tf1.setText("除數(shù)不能為零");

}

else

{

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

}

str.setLength(0);

y=0d;

}

else if(e2.getSource()==b3)//MC為清除內(nèi)存

{

m=0d;

tf2.setText("");

str.setLength(0);

}

else if(e2.getSource()==b4)//MR為重新調(diào)用存儲(chǔ)的數(shù)據(jù)

{

if(tf2.getText().trim()!="")//有記憶數(shù)字

{

tf1.setText(""+m);

}

}

else if(e2.getSource()==b5)//MS為存儲(chǔ)顯示的數(shù)據(jù)

{

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

tf2.setText("M");

tf1.setText("0");

str.setLength(0);

}

else if(e2.getSource()==b6)//M+為將顯示的數(shù)字與已經(jīng)存儲(chǔ)的數(shù)據(jù)相加要查看新的數(shù)字單擊MR

{

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

}

else//選擇的是其他的按鈕

{

if(e2.getSource()==b22)//如果選擇的是"0"這個(gè)數(shù)字鍵

{

if(tf1.getText().trim().equals("0"))//如果顯示屏顯示的為零不做操作

{

}

else

{

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

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

}

}

else if(e2.getSource()==b0)//選擇的是“BackSpace”按鈕

{

if(!tf1.getText().trim().equals("0"))//如果顯示屏顯示的不是零

{

if(str.length()!=1)

{

tf1.setText(str.delete(str.length()-1,str.length()).toString());//可能拋出字符串越界異常

}

else

{

tf1.setText("0");

str.setLength(0);

}

}

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

}

else//其他的數(shù)字鍵

{

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

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

}

}

}

catch(NumberFormatException e){

tf1.setText("數(shù)字格式異常");

}

catch(StringIndexOutOfBoundsException e){

tf1.setText("字符串索引越界");

}

}

}

public static void main(String args[])

{

new Counter();

}

}

JAVA 編寫(xiě)計(jì)算器 要代碼最簡(jiǎn)單的

學(xué)java的時(shí)候自己編的，很簡(jiǎn)單，能夠連續(xù)輸入計(jì)算式后進(jìn)行計(jì)算

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.FlowLayout;

import java.awt.Font;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.text.NumberFormat;

import java.util.ArrayList;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JTextField;

/**簡(jiǎn)易計(jì)算器，能夠進(jìn)行簡(jiǎn)單的計(jì)算

*

* @see 2008.12.9

*/

public class CalculatorA

implements ActionListener{

private JFrame frame;

private JTextField field;

private JButton[] allButtons;

private JButton clearButton;

// private JButton backButton;

String result="";//保存結(jié)果

StringBuilder sb = new StringBuilder();//保存要進(jìn)行的計(jì)算式

int x = 0; //用來(lái)判斷上一次的事件類型

String str = "123+456-789*0.=/";

ArrayListString arrayList = new ArrayListString();//保存計(jì)算式，通過(guò)方法進(jìn)行運(yùn)算

public CalculatorA(){

frame = new JFrame("我的計(jì)算器v1.1");

frame.setLocation(300,300);

field = new JTextField(25);

allButtons = new JButton[16];

for(int i=0;iallButtons.length;i++){

allButtons[i]= new JButton(str.substring(i,i+1));

}

clearButton = new JButton("CLEAR");

// backButton = new JButton("——");

init();

setFondAndColor();

addEventHander();

}

public void init(){

frame.setLayout(new BorderLayout());

JPanel northPanel = new JPanel();

JPanel centerPanel = new JPanel();

JPanel southPanel = new JPanel();

northPanel.setLayout(new FlowLayout());

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

southPanel.setLayout(new FlowLayout());

northPanel.add(field);

for(int i=0;iallButtons.length;i++){

centerPanel.add(allButtons[i]);

}

southPanel.add(clearButton);

//southPanel.add(backButton);

frame.add(northPanel,BorderLayout.NORTH);

frame.add(centerPanel,BorderLayout.CENTER);

frame.add(southPanel,BorderLayout.SOUTH);

}

//設(shè)置輸入字體

public void setFondAndColor(){

field.setFont(new Font("宋體",Font.BOLD,24));

field.setBackground(new Color(100,200,200));

field.setForeground(Color.RED);

//設(shè)置字體從右起始

field.setHorizontalAlignment(JTextField.RIGHT);

}

public void showMi(){

frame.pack();

frame.setResizable(false);

frame.setVisible(true);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public void addEventHander(){

for(int i=0;iallButtons.length;i++){

allButtons[i].addActionListener(this);

}

clearButton.addActionListener(this);

// backButton.addActionListener(this);

}

@Override

public void actionPerformed(ActionEvent e) {

String str = e.getActionCommand();//取得當(dāng)前事件返回的值

if("0123456789.".indexOf(str)!=-1){

if(x == 0){ //當(dāng)x為0時(shí)表示還沒(méi)有進(jìn)行輸入

result=str;

sb.append(str);

field.setText(str);

x = 1;

}

else if(x == 1){

result = result +str;

sb.append(str);

field.setText(result);

x = 1;

}

else if(x == 2){

sb.delete(0,sb.length());

result = result+str;

sb.append(str);

field.setText(result);

x = 1;

}

else if(x == 3){

result = str;

sb.delete(0,sb.length());

arrayList.clear();

field.setText(str);

sb.append(str);

field.setText(str);

x = 1;

}

else if(x == 4){

result ="";

sb.delete(0,sb.length());

arrayList.clear();

result = str;

sb.append(str);

field.setText(str);

x = 1;

}

else{

result = result +str;

sb.append(str);

field.setText(result);

x = 1;

}

}

else if("+*-/".indexOf(str)!=-1){

if(x == 0){

field.setText("");

x = 2;

}

else if(x == 1){

result = result + str;

arrayList.add(sb.toString());

arrayList.add(str);

sb.append(str);

field.setText(result);

x = 2;

}

else if(x == 2){

x = 2;

}

else if(x == 3){

field.setText(result+str);

arrayList.add(result);

arrayList.add(str);

result = result+str;

x = 2;

}

else if(x == 4){

result ="";

sb.delete(0,sb.length());

arrayList.clear();

x = 2;

}

else{

field.setText(result+str);

arrayList.add(result);

arrayList.add(str);

result = result+str;

x = 2;

}

}

else if("=".equals(str)){

if(x == 0){

field.setText("0");

arrayList.clear();

result = "0";

x = 3;

}

else if(x == 1){

try{

arrayList.add(sb.toString());

arrayList = getResult(arrayList);

result = arrayList.get(0);

field.setText(result);

arrayList.clear();

x = 3;

}catch(Exception e1){

field.setText("數(shù)據(jù)格式異常");

x = 0;

}

}

else if(x == 2){

field.setText("數(shù)據(jù)格式錯(cuò)誤.....");

arrayList.clear();

x = 0;

}

else if(x == 3){

field.setText(result);

x = 3;

}

else if(x == 4){

result ="";

sb.delete(0,sb.length());

arrayList.clear();

x = 3;

}

else {

try{

arrayList.add(sb.toString());

arrayList = getResult(arrayList);

result = arrayList.get(0);

field.setText(result);

arrayList.clear();

x = 3;

}catch(Exception e1){

field.setText("數(shù)據(jù)格式異常");

x = 0;

}

}

}

else if("CLEAR".equals(str)){

arrayList.clear();

field.setText("0");

arrayList.add("0");

x = 4;

}

else{

if(result.length()1){

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

if(sb.length()0){

sb.delete(sb.length()-1,sb.length());

}

else {

sb.delete(0,1);

}

field.setText(result);

x = 5;

}

else{

result = "";

sb.delete(0,sb.length());

arrayList.clear();

field.setText("0");

x = 0;

}

}

}

public static ArrayListString getResult(ArrayListString list){

String res = null;

String[] s = {"/","*","-","+"};

int i=0;

if(list.size()1){

for(;is.length;){

if(s[i].equals("/")){

for(int j=0;jlist.size();j++){

if(list.get(j).equals(s[i])){

res = Double.toString(Double.parseDouble(list.get(j-1))/Double.parseDouble(list.get(j+1)));

//本地的數(shù)據(jù)格式

NumberFormat nf = NumberFormat.getInstance();

res = nf.format(Double.parseDouble(res));

res = getChange(res);

list.set(j-1,res);

list.remove(j);

list.remove(j);

getResult(list);

}

}

i++;

}

else if(s[i].equals("*")){

for(int j=0;jlist.size();j++){

if(list.get(j).equals(s[i])){

res = Double.toString(Double.parseDouble(list.get(j-1))*Double.parseDouble(list.get(j+1)));

NumberFormat nf = NumberFormat.getInstance();

res = nf.format(Double.parseDouble(res));

res = getChange(res);

list.set(j-1,res);

list.remove(j);

list.remove(j);

getResult(list);

}

}

i++;

}

else if(s[i].equals("-")){

for(int j=0;jlist.size();j++){

if(list.get(j).equals(s[i])){

res = Double.toString(Double.parseDouble(list.get(j-1))-Double.parseDouble(list.get(j+1)));

NumberFormat nf = NumberFormat.getNumberInstance();

res = nf.format(Double.parseDouble(res));

res = getChange(res);

list.set(j-1,res);

list.remove(j);

list.remove(j);

getResult(list);

}

}

i++;

}

else {

for(int j=0;jlist.size();j++){

if(list.get(j).equals(s[i])){

res = Double.toString(Double.parseDouble(list.get(j-1))+Double.parseDouble(list.get(j+1)));

NumberFormat nf = NumberFormat.getInstance();

res = nf.format(Double.parseDouble(res));

res = getChange(res);

list.set(j-1,res);

list.remove(j);

list.remove(j);

getResult(list);

}

}

i++;

}

}

}

return list;

}

//對(duì)數(shù)字字符串進(jìn)行排除不必要符號(hào)

public static String getChange(String res){

String s_temp = "";

char[] c = new char[res.length()];

for(int k=0;kc.length;k++){

c[k] = res.charAt(k);

}

for(int k=0;kc.length;k++){

if((c[k]= '0' c[k]= '9')|| c[k] == '.'){

s_temp += c[k];

}

}

return s_temp;

}

public static void main(String[] args){

new CalculatorA().showMi();

}

}

計(jì)算器java代碼

import java.awt.Color;

import java.awt.Font;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTextField;

import javax.swing.WindowConstants;

import javax.swing.border.LineBorder;

class Normal{

double i,j;

public Normal(double num1,double num2){

i=num1;

j=num2;

}

public double puls(){

return i+j;

}

public double subtract(){

return i-j;

}

public double multiply(){

return i*j;

}

public double divide(){

return i/j;

}

public double surpuls(){

return i%j;

}

}

class scientific extends Normal{

public scientific(int num1, int num2) {

super(num1, num2);

}

}

public class calc extends JFrame{

public static void main(String[] args) {

viewNormal VN= new viewNormal("normal");

}

}

class viewNormal extends JFrame implements ActionListener{

JPanel jp1 = new JPanel(new GridLayout(4,3,5,5));

JPanel jp2 = new JPanel(new GridLayout(5,1,5,5));

JLabel jl;

JButton[] jb;

JButton jbs,jbo,jba,jbb,jbc,jby;

StringBuffer sb = new StringBuffer();

Normal normal;

int dot=0;

double fnum=0;

double lnum=0;

double result;

String sign=null;

public viewNormal(String title){

setTitle(title);

setLayout(null);

setVisible(true);

setBounds(200,200,305,350);

setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);

jb= new JButton[12];

for(int i=0;i9;i++){

jb[i]=new JButton(""+(i+1));

jp1.add(jb[i]);

jb[i].addActionListener(this);

}

jb[9]=new JButton(".");

jb[10]=new JButton("0");

jb[11]=new JButton("=");

jb[9].addActionListener(this);

jb[10].addActionListener(this);

jb[11].addActionListener(this);

jp1.add(jb[9]);

jp1.add(jb[10]);

jp1.add(jb[11]);

jp1.setBounds(10, 100, 200, 200);

jbs= new JButton("+");jbo= new JButton("-");jba= new JButton("*");

jbb= new JButton("/");jby= new JButton("%");jbc= new JButton("C");

jbs.addActionListener(this);jbo.addActionListener(this);jba.addActionListener(this);

jbb.addActionListener(this);jby.addActionListener(this);jbc.addActionListener(this);

//jp2.add(jby);

jp2.add(jbs);jp2.add(jbo);jp2.add(jba);jp2.add(jbb);jp2.add(jbc);

jp2.setBounds(215, 100, 70, 200);

jl= new JLabel("0",JLabel.RIGHT);

jl.setFont(new Font("Batang",Font.BOLD, 20));

jl.setBorder(new LineBorder(Color.black,2));

jl.setBackground(Color.white);

jl.setBounds(10, 40, 275, 50);

jl.setOpaque(true);

add(jl);

add(jp1);

add(jp2);

}

//+

public void sum(){

lnum=Double.parseDouble(sb.toString());

normal=new Normal(fnum,lnum);

fnum=normal.puls();

result=fnum;

}

//-

private void sub() {

System.out.println(sb.toString());

lnum=Double.parseDouble(sb.toString());

normal=new Normal(fnum,lnum);

fnum=normal.subtract();

result=fnum;

}

//*

private void mul() {

lnum=Double.parseDouble(sb.toString());

normal=new Normal(fnum,lnum);

fnum=normal.multiply();

result=fnum;

}

// /

private void div() {

lnum=Double.parseDouble(sb.toString());

normal=new Normal(fnum,lnum);

fnum=normal.divide();

result=fnum;

}

//%

private void sur() {

lnum=Double.parseDouble(sb.toString());

normal=new Normal(fnum,lnum);

fnum=normal.surpuls();

result=fnum;

}

// =

private void same(){

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

sum();

}

if(sign.equals("-")){

sub();

}

if(sign.equals("*")){

mul();

}

if(sign.equals("/")){

div();

}

if(sign.equals("%")){

sur();

}

}

//result

public void Result(){

if(result%1!=0)

jl.setText(""+result);

else

{

int i=(int)result;

jl.setText(""+i);

}

}

@Override

public void actionPerformed(ActionEvent e) {

//System.out.println(sb.toString());

// 1~9

for(int i=0;i9;i++){

if(e.getSource()==jb[i]!sb.toString().equals("0")){

sb.append(jb[i].getText());

jl.setText(sb.toString());

}

else if(e.getSource()==jb[i]sb.toString().equals("0")){

int d=sb.length();

sb.delete(0, d);

sb.append(jb[i].getText());

jl.setText(sb.toString());

}

}

// 0

if(e.getSource()==jb[10]!sb.toString().equals("0")){

sb.append(jb[10].getText());

jl.setText(sb.toString());

}

// .

if(e.getSource()==jb[9]dot==0!sb.toString().equals("")){

dot++;

sb.append(jb[9].getText());

jl.setText(sb.toString());

}

// =

if(e.getSource()==jb[11]!sb.toString().equals("")){

same();

Result();

int d=sb.length();

sb.delete(0, d);

dot=0;

}

// +

if(e.getSource()==jbs!sb.toString().equals("")){

if(sign!="+"sign!=null)

same();

else

sum();

sign ="+";

Result();

int d=sb.length();

sb.delete(0, d);

dot=0;

}

//-

if(e.getSource()==jbo!sb.toString().equals("")){

if(fnum==0)

fnum=2*Double.parseDouble(sb.toString());

if(sign!="-"sign!=null)

same();

else

sub();

sign ="-";

Result();

int d=sb.length();

sb.delete(0, d);

dot=0;

}

//*

if(e.getSource()==jba!sb.toString().equals("")){

if(fnum==0)

fnum=1;

if(sign!="*"sign!=null)

same();

else

mul();

sign ="*";

Result();

int d=sb.length();

sb.delete(0, d);

dot=0;

}

// /

if(e.getSource()==jbb!sb.toString().equals("")){

if(fnum==0)

fnum=Math.pow(Double.parseDouble(sb.toString()),2);

if(sign!="/"sign!=null)

same();

else

div();

sign ="/";

Result();

int d=sb.length();

sb.delete(0, d);

dot=0;

}

//%

// if(e.getSource()==jby!sb.toString().equals("")){

// if(fnum==0){

// fnum=Double.parseDouble(sb.toString());

// result=fnum;

// }

// else {

// if(sign!="%"sign!=null)

// same();

// else{

// lnum=Double.parseDouble(sb.toString());

// normal=new Normal(fnum,lnum);

// fnum=normal.surpuls();

// result=fnum;

// }

// }

// sign ="%";

// Result();

// int d=sb.length();

// sb.delete(0, d);

// dot=0;

// }

//clear

if(e.getSource()==jbc){

int d=sb.length();

sb.delete(0, d);

jl.setText("0");

dot=0;

fnum=0;

lnum=0;

sign=null;

}

}

}

class viewScientific extends viewNormal{

public viewScientific(String title){

super(title);

setBounds(200,200,800,500);

}

}

//等號(hào)以后輸入符號(hào)用不了， String轉(zhuǎn) double 本來(lái)就有錯(cuò)誤，你可以用我的擴(kuò)展成科學(xué)型的。

文章題目：頁(yè)面計(jì)算器的java代碼 javagui界面設(shè)計(jì)計(jì)算器
轉(zhuǎn)載來(lái)源：http://bm7419.com/article2/ddeghoc.html

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