import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.math.BigDecimal;
import javax.swing.*;
public class TestComputer implements ActionListener{//用于接收操作事件的侦听器接口.对处理操作事件感兴趣的类可以实现此接口,
//而使用该类创建的对象可使用组件的 addActionListener 方法向该组件注册.在发生操作事件时,调用该对象的 actionPerformed 方法.
private boolean append = false;//数字处于替换状态
JTextField jtf = new JTextField(10);//构造一个具有指定列数的新的空 TextField.
private String operator = "+";
private String op1 = "0";
public void actionPerformed(ActionEvent ae){//发生操作时调用.
String com = ae.getActionCommand();//返回与此动作相关的命令字符串.
if(append){//追加
String temp = jtf.getText();//返回此 TextComponent 中包含的文本.
jtf.setText(temp+com);//将此 TextComponent 文本设置为指定文本.
}else{//替换
jtf.setText(com);
append = true;
}
}else if("+-*/".indexOf(com)!=-1){//返回第一次出现的指定子字符串在此字符串中的索引.
op1 = jtf.getText();
operator = com;
append = false;
}else if("=".equals(com)){
BigDecimal d1 = new BigDecimal(op1);// 将 BigDecimal 的字符串表示形式转换为 BigDecimal.
if("+".equals(operator)){
}else if("-".equals(operator)){
}else if("*".equals(operator)){
}else{
jtf.setText(d1.toString());//返回此 BigDecimal 的字符串表示形式,如果需要指数,则使用科学记数法.
}else if(".".equals(com)){
String temp = jtf.getText();
if(temp.indexOf(com)==-1){//没有找到
jtf.setText(temp+".");
}else if("+/-".equals(com)){
if(temp.startsWith("-")){
jtf.setText(temp.substring(1));
jtf.setText("-"+temp);
}else if("Back".equals(com)){
if(temp.length()0){
jtf.setText(temp.substring(0,temp.length()-1));
}else if("CE".equals(com)||"C".equals(com)){
jtf.setText("0");
public TestComputer(){
JFrame jf = new JFrame("grefr的计算器");//创建一个新的、初始不可见的、具有指定标题的 Frame.
JPanel jp = new JPanel();//创建具有双缓冲和流布局的新 JPanel.
//setLayout(LayoutManager mgr)设置此容器的布局管理器.
//GridLayout(int rows, int cols)创建具有指定行数和列数的网格布局.
JButton[] jb = new JButton[lab.length];
jf.add(jtf,BorderLayout.NORTH);
for(int i=0;ijb.length;i++){
jb[i] = new JButton(lab[i]);
jp.add(jb[i]);
jb[i].addActionListener(this);//将一个 ActionListener 添加到按钮中.
jf.add(jp);
jf.setVisible(true);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
public static void main(String[] args) {
new TestComputer();
import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;
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;
i=num1;
public double puls(){
return i+j;
public double subtract(){
return i-j;
public double multiply(){
return i*j;
return i/j;
public double surpuls(){
return i%j;
class scientific extends Normal{
public class calc extends JFrame{
viewNormal VN= new viewNormal("normal");
class viewNormal extends JFrame implements ActionListener{
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);
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
jb[i]=new JButton(""+(i+1));
jp1.add(jb[i]);
jb[i].addActionListener(this);
jb[10]=new JButton("0");
jb[11]=new JButton("=");
jb[10].addActionListener(this);
jb[11].addActionListener(this);
jp1.add(jb[10]);
jp1.add(jb[11]);
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);
jl= new JLabel("0",JLabel.RIGHT);
jl.setBackground(Color.white);
jl.setOpaque(true);
add(jl);
add(jp1);
//+
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());
fnum=normal.subtract();
//*
private void mul() {
fnum=normal.multiply();
// /
//%
private void sur() {
fnum=normal.surpuls();
// =
private void same(){
if(sign.equals("+")){
sum();
if(sign.equals("-")){
sub();
if(sign.equals("*")){
mul();
if(sign.equals("/")){
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());
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);
// 0
if(e.getSource()==jb[10]!sb.toString().equals("0")){
sb.append(jb[10].getText());
// .
dot++;
// =
if(e.getSource()==jb[11]!sb.toString().equals("")){
same();
Result();
dot=0;
// +
if(e.getSource()==jbs!sb.toString().equals("")){
if(sign!="+"sign!=null)
sign ="+";
if(e.getSource()==jbo!sb.toString().equals("")){
if(fnum==0)
if(sign!="-"sign!=null)
sign ="-";
if(e.getSource()==jba!sb.toString().equals("")){
fnum=1;
if(sign!="*"sign!=null)
sign ="*";
// /
if(e.getSource()==jbb!sb.toString().equals("")){
if(sign!="/"sign!=null)
sign ="/";
// 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();
// }
// sign ="%";
// Result();
// int d=sb.length();
// sb.delete(0, d);
// dot=0;
// }
//clear
if(e.getSource()==jbc){
jl.setText("0");
fnum=0;
lnum=0;
sign=null;
class viewScientific extends viewNormal{
public viewScientific(String title){
super(title);
//等号以后输入符号用不了, String转 double 本来就有错误,你可以用我的扩展成科学型的.
学java的时候自己编的,很简单,能够连续输入计算式后进行计算
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.text.NumberFormat;
import java.util.ArrayList;
/**简易计算器,能够进行简单的计算
*
*/
public class CalculatorA
implements ActionListener{
private JFrame frame;
private JTextField field;
private JButton[] allButtons;
private JButton clearButton;
// private JButton backButton;
String result="";//保存结果
StringBuilder sb = new StringBuilder();//保存要进行的计算式
int x = 0; //用来判断上一次的事件类型
ArrayListString arrayList = new ArrayListString();//保存计算式,通过方法进行运算
public CalculatorA(){
frame = new JFrame("我的计算器v1.1");
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());
southPanel.setLayout(new FlowLayout());
northPanel.add(field);
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);
//设置输入字体
public void setFondAndColor(){
field.setForeground(Color.RED);
//设置字体从右起始
field.setHorizontalAlignment(JTextField.RIGHT);
public void showMi(){
frame.pack();
frame.setResizable(false);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
public void addEventHander(){
allButtons[i].addActionListener(this);
clearButton.addActionListener(this);
// backButton.addActionListener(this);
String str = e.getActionCommand();//取得当前事件返回的值
if(x == 0){ //当x为0时表示还没有进行输入
result=str;
sb.append(str);
field.setText(str);
x = 1;
else if(x == 1){
result = result +str;
field.setText(result);
sb.delete(0,sb.length());
result = result+str;
result = str;
arrayList.clear();
result ="";
else{
else if("+*-/".indexOf(str)!=-1){
if(x == 0){
field.setText("");
result = result + str;
arrayList.add(sb.toString());
arrayList.add(str);
field.setText(result+str);
arrayList.add(result);
else if("=".equals(str)){
field.setText("0");
result = "0";
try{
arrayList = getResult(arrayList);
result = arrayList.get(0);
}catch(Exception e1){
field.setText("数据格式异常");
x = 0;
field.setText("数据格式错误.....");
else {
else if("CLEAR".equals(str)){
arrayList.add("0");
if(result.length()1){
result = result.substring(0,result.length()-1);
if(sb.length()0){
sb.delete(sb.length()-1,sb.length());
sb.delete(0,1);
result = "";
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)));
//本地的数据格式
NumberFormat nf = NumberFormat.getInstance();
res = nf.format(Double.parseDouble(res));
res = getChange(res);
list.set(j-1,res);
list.remove(j);
getResult(list);
i++;
else if(s[i].equals("*")){
res = Double.toString(Double.parseDouble(list.get(j-1))*Double.parseDouble(list.get(j+1)));
else if(s[i].equals("-")){
res = Double.toString(Double.parseDouble(list.get(j-1))-Double.parseDouble(list.get(j+1)));
NumberFormat nf = NumberFormat.getNumberInstance();
res = Double.toString(Double.parseDouble(list.get(j-1))+Double.parseDouble(list.get(j+1)));
return list;
//对数字字符串进行排除不必要符号
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);
s_temp += c[k];
return s_temp;
public static void main(String[] args){
new CalculatorA().showMi();
public class Calculator {
private int number1;
this.number1 = number1;
public double add() {
public double subtract() {
public double multiple() {
return 0;
public class TestCalculator {
System.out.println(calculator.add());
System.out.println(calculator.subtract());
System.out.println(calculator.multiple());
界面漂亮堪比系统自带计算器,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,连加连乘功能完全参考系统官方计算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.event.*;
import java.util.*;
public class Counter {
CounterFrame frame = new CounterFrame();
frame.show();
class CounterFrame extends JFrame {
public CounterFrame() {
JMenuBar menuBar = new JMenuBar();
JMenu menuFile = new JMenu();
JMenu menuFile1 = new JMenu();
JMenuItem menuFileExit = new JMenuItem();
menuFile.setText("文件");
menuFileExit.setText("退出");
menuFileExit.addActionListener
(
new ActionListener() {
CounterFrame.this.windowClosed();
);
menuFile.add(menuFileExit);
menuBar.add(menuFile);
menuBar.add(menuFile1);
setTitle("计算器");
setJMenuBar(menuBar);
this.getContentPane().add(new Allpanel());
this.addWindowListener
new WindowAdapter() {
public void windowClosing(WindowEvent e) {
protected void windowClosed() {
System.exit(0);
class Tool {
public static Tool instance;
private Tool() {
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() {
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 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();
final JButton b=new JButton(arg[i]);
//this.add(new JButton(arg[i]));
this.add(b);
b.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
String mark=b.getText();
String ma=text.getText();
text.setText("0."+mark);
else if(vc.contains("a"))
vc.clear();
text.setText(mark);
Vec.clear();
Vec.add(mark);
text.setText(ma.trim()+mark);
begin="no";
to="yes";
});
String mar=b.getText();
String m=text.getText();
if("yes".equals(begin))
if(vc1.contains("v1"))
vc1.clear();
if(!Vec.contains(".")!vc.contains("a"))
text.setText(m.trim()+mar);
Vec.add(".");
add=Double.parseDouble(ma);
if(what==null)
tool=add;
what="add";
tool=tool+add;
text.setText(String.valueOf((tool)));
vc.add("a");
vc1.add("v1");
to="+";
jq=Double.parseDouble(ma);
tool=jq;
what="jq";
tool=tool-jq;
to="-";
cq=Double.parseDouble(ma);
tool=cq;
what="cq";
tool=tool/cq;
to="/";
text.setText(String.valueOf(Math.sqrt(cq)));
cs=Double.parseDouble(ma);
tool=cs;
what="cs";
tool=tool*cs;
to="*";
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(to=="+")
jg=String.valueOf(tool+dy);
else if(to=="-")
jg=String.valueOf(dy-tool);
else if(to=="*")
jg=String.valueOf(dy*tool);
else if(to=="/")
jg=String.valueOf(dy/tool);
jg=String.valueOf(dy);
text.setText(jg);
what=null;
tool=0;
class Centernorth extends JPanel {
public Centernorth() {
JButton jb1=new JButton("Backspace");
this.add(jb1);
jb1.addActionListener(new ActionListener(){
String back=Tool.getinstance().getfield().getText();
text.setText(backmethod(back));
Centercenter.Vec.remove(Centercenter.Vec.size()-1);
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() {
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.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>>========================
static Vector Vec=new Vector();
static Vector vc=new Vector();
static Vector vc1=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";
if(i==11)
------------------------------------------------------------
才子_辉祝您愉快！
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