java简单计算器源代码 java做简单计算器的代码

Java计算器源代码

import java.awt.*;

成都创新互联公司专注于景泰企业网站建设,响应式网站建设,商城网站定制开发。景泰网站建设公司,为景泰等地区提供建站服务。全流程定制网站建设，专业设计，全程项目跟踪，成都创新互联公司专业和态度为您提供的服务

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.*;public class CaculatorA {

private JFrame jf;

private JButton[] jbs;

private JTextField jtf;

private JButton clear;

private double num1,num2,jieguo;

private char c;

/**

* 构造方法实例化慎含属让山性

*

*/

public CaculatorA(){

jf=new JFrame("我的计算坦孝中器v1.0");

jtf=new JTextField(20);

clear=new JButton("clear");

jbs=new JButton[16];

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

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

jbs[i]=new JButton(str.charAt(i)+"");

}

init();

addEventHandler();

// setFont();

// setColor();

showMe();

}

/**

java编一个计算器的代码

界面漂亮堪比系统自基枯余带计算器，功能完美加减乘除开平方等等全部具备，还有清零按钮，小数点的使用，连加败派连乘功能完全参考系统官方计算搏滚器经过长期调试改进而成，马上拷贝代码拿去试试看吧，绝不后悔！

代码如下：

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import java.util.*;

public class Counter {

public static void main(String[] args) {

CounterFrame frame = new CounterFrame();

frame.show();

}

}

class CounterFrame extends JFrame {

public CounterFrame() {

JMenuBar menuBar = new JMenuBar();

JMenu menuFile = new JMenu();

JMenu menuFile1 = new JMenu();

JMenu menuFile2 = new JMenu();

JMenu menuFile3 = new JMenu();

JMenuItem menuFileExit = new JMenuItem();

menuFile.setText("文件");

menuFile1.setText("编辑");

menuFile2.setText("查看");

menuFile3.setText("帮助");

menuFileExit.setText("退出");

menuFileExit.addActionListener

(

new ActionListener() {

public void actionPerformed(ActionEvent e) {

CounterFrame.this.windowClosed();

}

}

);

menuFile.add(menuFileExit);

menuBar.add(menuFile);

menuBar.add(menuFile1);

menuBar.add(menuFile2);

menuBar.add(menuFile3);

setTitle("计算器");

setJMenuBar(menuBar);

setSize(new Dimension(400, 280));

this.getContentPane().add(new Allpanel());

this.addWindowListener

(

new WindowAdapter() {

public void windowClosing(WindowEvent e) {

CounterFrame.this.windowClosed();

}

}

);

}

protected void windowClosed() {

System.exit(0);

}

}

class Tool {

public static Tool instance;

private JTextField field;

private Tool() {

this.field=new JTextField(30);

this.field.setHorizontalAlignment(JTextField.RIGHT);

}

public static Tool getinstance()

{

if(instance==null)

{

instance=new Tool();

}

return instance;

}

public JTextField getfield()

{

return (this.field);

}

}

class Allpanel extends JPanel {

public Allpanel() {

this.setLayout(new BorderLayout(0,7));

Northpanel np=new Northpanel();

Centerpanel cp=new Centerpanel();

this.add(np,BorderLayout.NORTH);

this.add(cp,BorderLayout.CENTER);

}

}

class Centercenter extends JPanel {

static Vector Vec=new Vector();

static Vector vc=new Vector();

static Vector vc1=new Vector();

static Vector vc2=new Vector();

static Vector vc3=new Vector();

static String begin="yes";

static double add;

static double jq;

static double cs;

static double cq;

static double dy;

static String jg;

static String what;

static double tool=0;

static String to="yes";

/**

* Method Centercenter

*

*

*/

public Centercenter() {

// TODO: Add your code here

final JTextField text=Tool.getinstance().getfield();

this.setLayout(new GridLayout(4,5,3,3));

String arg[] ={"7","8","9","/","sqrt","4","5","6","*","%","1","2","3","-","1/x","0","+/-",".","+","="};

for(int i=0;i20;i++)

{

final JButton b=new JButton(arg[i]);

//this.add(new JButton(arg[i]));

this.add(b);

if(i==0||i==1||i==2||i==5||i==6||i==7||i==10||i==11||i==12||i==15)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String mark=b.getText();

String ma=text.getText();

if(vc3.contains("v3"))

{

text.setText("0."+mark);

vc3.clear();

}

else if(vc.contains("a"))

{

if(vc2.contains("v2"))

{

text.setText("0."+mark);

vc.clear();

vc2.clear();

}

else

{

text.setText(mark);

vc.clear();

Vec.clear();

Vec.add(mark);

}

}

else

{

text.setText(ma.trim()+mark);

Vec.add(mark);

}

begin="no";

to="yes";

}

});

}

if(i==17)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String mar=b.getText();

String m=text.getText();

if("yes".equals(begin))

{

vc3.add("v3");

}

if(vc1.contains("v1"))

{

vc2.add("v2");

vc1.clear();

}

if(!Vec.contains(".")!vc.contains("a"))

{

text.setText(m.trim()+mar);

Vec.add(".");

}

}

});

}

if(i==18)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String ma=text.getText();

add=Double.parseDouble(ma);

if(what==null)

{

tool=add;

what="add";

}

else

{

tool=tool+add;

text.setText(String.valueOf((tool)));

}

vc.add("a");

vc1.add("v1");

to="+";

}

});

}

if(i==13)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String ma=text.getText();

jq=Double.parseDouble(ma);

if(what==null)

{

tool=jq;

what="jq";

}

else

{

tool=tool-jq;

text.setText(String.valueOf((tool)));

}

vc.add("a");

vc1.add("v1");

to="-";

}

});

}

if(i==3)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String ma=text.getText();

cq=Double.parseDouble(ma);

if(what==null)

{

tool=cq;

what="cq";

}

else

{

tool=tool/cq;

text.setText(String.valueOf((tool)));

}

vc.add("a");

vc1.add("v1");

to="/";

}

});

}

if(i==4)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String ma=text.getText();

cq=Double.parseDouble(ma);

text.setText(String.valueOf(Math.sqrt(cq)));

}

});

}

if(i==8)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String ma=text.getText();

cs=Double.parseDouble(ma);

if(what==null)

{

tool=cs;

what="cs";

}

else

{

tool=tool*cs;

text.setText(String.valueOf((tool)));

}

vc.add("a");

vc1.add("v1");

to="*";

}

});

}

if(i==19)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String ma=text.getText();

dy=Double.parseDouble(ma);

if(what=="add")

{

jg=String.valueOf((tool+dy));

}

if(what=="jq")

{

jg=String.valueOf((tool-dy));

}

if(what=="cs")

{

jg=String.valueOf((tool*dy));

}

if(what=="cq")

{

jg=String.valueOf((tool/dy));

}

if(what==null)

{

if(to=="+")

{

tool=add;

jg=String.valueOf(tool+dy);

}

else if(to=="-")

{

tool=jq;

jg=String.valueOf(dy-tool);

}

else if(to=="*")

{

tool=cs;

jg=String.valueOf(dy*tool);

}

else if(to=="/")

{

tool=cq;

jg=String.valueOf(dy/tool);

}

else

{

jg=String.valueOf(dy);

}

}

text.setText(jg);

Vec.clear();

Vec.add(".");

vc.add("a");

vc1.add("v1");

what=null;

tool=0;

}

});

}

}

}

}

class Centernorth extends JPanel {

public Centernorth() {

final JTextField text=Tool.getinstance().getfield();

JButton jb1=new JButton("Backspace");

JButton jb2=new JButton(" CE ");

JButton jb3=new JButton(" C ");

this.add(jb1);

this.add(jb2);

this.add(jb3);

jb1.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e)

{

String back=Tool.getinstance().getfield().getText();

text.setText(backmethod(back));

Centercenter.Vec.remove(Centercenter.Vec.size()-1);

}

});

jb3.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e)

{

text.setText("0.");

Centercenter.Vec.clear();

Centercenter.Vec.add(".");

Centercenter.vc.add("a");

Centercenter.begin="yes";

Centercenter.vc1.clear();

Centercenter.what=null;

Centercenter.tool=0;

}

});

}

public String backmethod(String str)

{

return str.substring(0,str.length()-1);

}

}

class Centerpanel extends JPanel {

public Centerpanel() {

this.setLayout(new BorderLayout(8,7));

Centernorth cn=new Centernorth();

Centercenter cc=new Centercenter();

Centerwest cw=new Centerwest();

this.add(cn,BorderLayout.NORTH);

this.add(cc,BorderLayout.CENTER);

this.add(cw,BorderLayout.WEST);

}

}

class Centerwest extends JPanel {

public Centerwest() {

this.setLayout(new GridLayout(4,1,3,3));

this.add(new JButton("MC"));

this.add(new JButton("MR"));

this.add(new JButton("MS"));

this.add(new JButton("M+"));

}

}

class Northpanel extends JPanel {

private JTextField tf;

public Northpanel() {

tf=Tool.getinstance().getfield();

this.add(tf);

}

}

---------------------------------------------------------------------------

=============《按你要求特意后改过的最简单功能的代码如下》========================

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import java.util.*;

public class Counter2 {

public static void main(String[] args) {

CounterFrame frame = new CounterFrame();

frame.show();

}

}

class CounterFrame extends JFrame {

public CounterFrame() {

setTitle("计算器");

setSize(new Dimension(400, 280));

this.getContentPane().add(new Allpanel());

this.addWindowListener

(

new WindowAdapter() {

public void windowClosing(WindowEvent e) {

CounterFrame.this.windowClosed();

}

}

);

}

protected void windowClosed() {

System.exit(0);

}

}

class Tool {

public static Tool instance;

private JTextField field;

private Tool() {

this.field=new JTextField(30);

this.field.setHorizontalAlignment(JTextField.RIGHT);

}

public static Tool getinstance()

{

if(instance==null)

{

instance=new Tool();

}

return instance;

}

public JTextField getfield()

{

return (this.field);

}

}

class Allpanel extends JPanel {

public Allpanel() {

this.setLayout(new BorderLayout(0,7));

Northpanel np=new Northpanel();

Centerpanel cp=new Centerpanel();

this.add(np,BorderLayout.NORTH);

this.add(cp,BorderLayout.CENTER);

}

}

class Centercenter extends JPanel {

static Vector Vec=new Vector();

static Vector vc=new Vector();

static Vector vc1=new Vector();

static Vector vc2=new Vector();

static Vector vc3=new Vector();

static String begin="yes";

static double add;

static double jq;

static double cs;

static double cq;

static double dy;

static String jg;

static String what;

static double tool=0;

static String to="yes";

/**

* Method Centercenter

*

*

*/

public Centercenter() {

// TODO: Add your code here

final JTextField text=Tool.getinstance().getfield();

this.setLayout(new GridLayout(4,5,3,3));

String arg[] ={"7","8","9","/","4","5","6","*","1","2","3","-","0","=",".","+"};

for(int i=0;i16;i++)

{

final JButton b=new JButton(arg[i]);

//this.add(new JButton(arg[i]));

this.add(b);

if(i==0||i==1||i==2||i==4||i==5||i==6||i==8||i==9||i==10||i==12)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String mark=b.getText();

String ma=text.getText();

if(vc3.contains("v3"))

{

text.setText("0."+mark);

vc3.clear();

}

else if(vc.contains("a"))

{

if(vc2.contains("v2"))

{

text.setText("0."+mark);

vc.clear();

vc2.clear();

}

else

{

text.setText(mark);

vc.clear();

Vec.clear();

Vec.add(mark);

}

}

else

{

text.setText(ma.trim()+mark);

Vec.add(mark);

}

begin="no";

to="yes";

}

});

}

if(i==14)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String mar=b.getText();

String m=text.getText();

if("yes".equals(begin))

{

vc3.add("v3");

}

if(vc1.contains("v1"))

{

vc2.add("v2");

vc1.clear();

}

if(!Vec.contains(".")!vc.contains("a"))

{

text.setText(m.trim()+mar);

Vec.add(".");

}

}

});

}

if(i==15)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String ma=text.getText();

add=Double.parseDouble(ma);

if(what==null)

{

tool=add;

what="add";

}

else

{

tool=tool+add;

text.setText(String.valueOf((tool)));

}

vc.add("a");

vc1.add("v1");

to="+";

}

});

}

if(i==11)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String ma=text.getText();

jq=Double.parseDouble(ma);

if(what==null)

{

tool=jq;

what="jq";

}

else

{

tool=tool-jq;

text.setText(String.valueOf((tool)));

}

vc.add("a");

vc1.add("v1");

to="-";

}

});

}

if(i==3)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String ma=text.getText();

cq=Double.parseDouble(ma);

if(what==null)

{

tool=cq;

what="cq";

}

else

{

tool=tool/cq;

text.setText(String.valueOf((tool)));

}

vc.add("a");

vc1.add("v1");

to="/";

}

});

}

if(i==7)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String ma=text.getText();

cs=Double.parseDouble(ma);

if(what==null)

{

tool=cs;

what="cs";

}

else

{

tool=tool*cs;

text.setText(String.valueOf((tool)));

}

vc.add("a");

vc1.add("v1");

to="*";

}

});

}

if(i==13)

{

b.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

String ma=text.getText();

dy=Double.parseDouble(ma);

if(what=="add")

{

jg=String.valueOf((tool+dy));

}

if(what=="jq")

{

jg=String.valueOf((tool-dy));

}

if(what=="cs")

{

jg=String.valueOf((tool*dy));

}

if(what=="cq")

{

jg=String.valueOf((tool/dy));

}

if(what==null)

{

if(to=="+")

{

tool=add;

jg=String.valueOf(tool+dy);

}

else if(to=="-")

{

tool=jq;

jg=String.valueOf(dy-tool);

}

else if(to=="*")

{

tool=cs;

jg=String.valueOf(dy*tool);

}

else if(to=="/")

{

tool=cq;

jg=String.valueOf(dy/tool);

}

else

{

jg=String.valueOf(dy);

}

}

text.setText(jg);

Vec.clear();

Vec.add(".");

vc.add("a");

vc1.add("v1");

what=null;

tool=0;

}

});

}

}

}

}

class Centernorth extends JPanel {

public Centernorth() {

final JTextField text=Tool.getinstance().getfield();

}

}

class Centerpanel extends JPanel {

public Centerpanel() {

this.setLayout(new BorderLayout(8,7));

Centernorth cn=new Centernorth();

Centercenter cc=new Centercenter();

Centerwest cw=new Centerwest();

this.add(cn,BorderLayout.NORTH);

this.add(cc,BorderLayout.CENTER);

this.add(cw,BorderLayout.WEST);

}

}

class Centerwest extends JPanel {

public Centerwest() {

}

}

class Northpanel extends JPanel {

private JTextField tf;

public Northpanel() {

tf=Tool.getinstance().getfield();

this.add(tf);

}

}

------------------------------------------------------------

才子_辉祝您愉快！

求Java编的简单计算器源代码

package edu.hpu.yyf;

import java.awt.*;

import java.awt.event.*;

public class MyCalculator {

private static double d1 = 0.0;

private static double d2 = 0.0;

private static String s1 = new String("0");

private static String s2 = new String("0");

private static char c1 ='0';

private static void judgec1(TextField text){

switch(c1){

case '+':s2 = String.valueOf(d1+d2);d1=d1+d2;d2=0;text.setText(s2);s2="0";break;

case '-':s2 = String.valueOf(d1-d2);d1=d1-d2;d2=0;text.setText(s2);s2="如早0";break;

case '*':s2 = String.valueOf(d1*d2);d1=d1*d2;d2=0;text.setText(s2);s2="0";break;

case '/':if(d2==0) {text.setText("0");d1=0;break;}s2 = String.valueOf(d1/d2);d1=d1/d2;d2=0;text.setText(s2);s2="0";break;}

}

public static void main(String [] args){

Frame cclt = new Frame("我的计算纳清器");

cclt.setBounds(300,150,300,265);

cclt.setLayout(null);

final TextField text = new TextField();

text.setBounds(10, 30, 280, 35);

text.setText("0");

text.setEditable(false);

Font font = new Font("", 5, 25);

text.setFont(font);

cclt.add(text);

Panel panel = new Panel();

Font font_1 = new Font("", 5, 20);

panel.setFont(font_1);

panel.setBounds(5, 67, 290, 193);

panel.setBackground(Color.GREEN);

panel.setLayout(new GridLayout(5,4,5,5));

cclt.add(panel);

Button space = new Button();

panel.add(space);

Button Backspace = new Button("Backspace");

Font font_2 = new Font("", 0, 14);

Backspace.setFont(font_2);

panel.add(Backspace);

Button CE = new Button("洞橡前CE");

panel.add(CE);

Button C = new Button("C");

panel.add(C);

Button seven = new Button("7");

panel.add(seven);

Button eight = new Button("8");

panel.add(eight);

Button nine = new Button("9");

panel.add(nine);

Button but = new Button("/");

panel.add(but);

Button four = new Button("4");

panel.add(four);

Button five = new Button("5");

panel.add(five);

Button six = new Button("6");

panel.add(six);

Button ride = new Button("*");

panel.add(ride);

Button one = new Button("1");

panel.add(one);

Button two = new Button("2");

panel.add(two);

Button three = new Button("3");

panel.add(three);

Button substract = new Button("-");

panel.add(substract);

Button zero = new Button("0");

panel.add(zero);

Button space_1 = new Button(" ");

panel.add(space_1);

Button equal = new Button("=");

panel.add(equal);

Button add = new Button("+");

panel.add(add);

CE.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

d1=0;

d2=0;

s1="0";

s2="0";

c1 ='0';

text.setText("0");

}

});

seven.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(s1.equals("0")) s1="7";

else {text.setText(s1+"7");

s1+="7";}

text.setText(s1);

}

});

eight.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(s1.equals("0")) s1="8";

else {text.setText(s1+"8");

s1+="8";}

text.setText(s1);

}

});

nine.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(s1.equals("0")) s1="9";

else {text.setText(s1+"9");

s1+="9";}

text.setText(s1);

}

});

four.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(s1.equals("0")) s1="4";

else {text.setText(s1+"4");

s1+="4";}

text.setText(s1);

}

});

five.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(s1.equals("0")) s1="5";

else {text.setText(s1+"5");

s1+="5";}

text.setText(s1);

}

});

six.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(s1.equals("0")) s1="6";

else {text.setText(s1+"6");

s1+="6";}

text.setText(s1);

}

});

one.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(s1.equals("0")) s1="1";

else {text.setText(s1+"1");

s1+="1";}

text.setText(s1);

}

});

two.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(s1.equals("0")) s1="2";

else {text.setText(s1+"2");

s1+="2";}

text.setText(s1);

}

});

three.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(s1.equals("0")) s1="3";

else {text.setText(s1+"3");

s1+="3";}

text.setText(s1);

}

});

zero.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(!s1.equals("0")) s1+="0";

text.setText(s1);

}

});

but.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(c1=='0') {d1=Double.parseDouble(s1);if(d1!=0){c1 = '/';}}

else {d2=Double.parseDouble(s1);

judgec1(text);

c1 = '/';}

s1="0";

}

});

substract.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(c1=='0') {d1=Double.parseDouble(s1);if(d1!=0){c1 = '-';}}

else {d2=Double.parseDouble(s1);

judgec1(text);

c1 = '-';}

s1="0";

}

});

ride.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(c1=='0') {d1=Double.parseDouble(s1);if(d1!=0){c1 = '*';}}

else {d2=Double.parseDouble(s1);

judgec1(text);

c1 = '*';}

s1="0";

}

});

add.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(c1=='0') {d1=Double.parseDouble(s1);if(d1!=0){c1 = '+';}}

else {d2=Double.parseDouble(s1);

judgec1(text);

c1 = '+';}

s1="0";

}

});

/* Backspace.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(s1.length()!=0){

if(c1=='0') {text.setText(s1.substring(0, s1.length()-1));s1=s1.substring(0, s1.length()-1);}

else if (c1!='0'!s2.equals("0")) {text.setText(s2.substring(0, s1.length()-1));s2=s2.substring(0, s2.length()-1);}

}}

});*/

equal.addActionListener(new ActionListener(){

@Override

public void actionPerformed(ActionEvent e) {

if(c1=='0') d1=Double.parseDouble(s1);

else {d2=Double.parseDouble(s1);

judgec1(text);}

s1="0";

c1='0';

}

});

cclt.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

((Frame) e.getComponent()).dispose();

}

});

cclt.setResizable(false);

cclt.setVisible(true);

}

}

我们老师写的哦