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=0i<20i++)
{
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=0i<16i++)
{
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！
import java.awt.*import java.awt.event.*
public class lvhaiya{
int tmp,sum,sum1,sum2=1,sum3=1
String a,b,c,dString s=""
Frame f=new Frame("计算器")
private String[]name={
"0","1","2","3","4","5","6","7","8","9","+","-","*","/","=","空格"
}
public Button[] button=new Button[name.length]
TextField t=new TextField("",30)
Panel p=new Panel()
Panel p1=new Panel()
Color color=new Color(100,170,90)
public lvhaiya(){
p1.setLayout(new GridLayout(5,5))
for(int i=0i<name.lengthi++){
button[i]=new Button(name[i])
p1.add(button[i])
}
p.setLayout(new FlowLayout(FlowLayout.LEFT))
p.setBackground(color)
p.add(t)
f.add(p,BorderLayout.NORTH)
f.add(p1,BorderLayout.SOUTH)
f.pack()
f.setVisible(true)
f.addWindowListener( new WindowClose())
t.setText("0.")
for(int i=0i<name.lengthi++){
button[i].addActionListener(new ButtonEventl())
}
}
public static void main(String[]args){
new lvhaiya()
}
class WindowClose extends WindowAdapter{
public void windouClosing(WindowEvent e){
System.exit(0)
}
}
class ButtonEventl implements ActionListener{
public void actionPerformed(ActionEvent e)throws ArithmeticException{
String command=e.getActionCommand()
if(command.equals("+")){
sum=Integer.parseInt(t.getText())+sum
t.setText(String.valueOf(sum))
a=t.getText()
s=""
}
else if(command.equals("-")){
sum1=Integer.parseInt(t.getText())
b=t.getText()
s=""
}
else if(command.equals("*")){
sum2=Integer.parseInt(t.getText())*sum2
t.setText(String.valueOf(sum2))
c=t.getText()
s=""
}
else if(command.equals("/")){
sum3=Integer.parseInt(t.getText())
d=t.getText()
s=""
}
else if(command.equals("=")){
if(a!=null){
t.setText(String.valueOf(sum+tmp))
}
if(b!=null){
t.setText(String.valueOf(sum1-tmp))
}
if(c!=null){
t.setText(String.valueOf(sum2*tmp))
}
try{
if(d!=null){
t.setText(String.valueOf(sum3/tmp))
}
}
catch(ArithmeticException a){
t.setText("除数不能为零")
}
}
else if(command.equals("空格")){
sum=0
a=null
b=null
c=null
d=null
sum1=0
sum2=1
sum3=1
tmp=0
t.setText("0")
s=""
}
else{
s=s+command
t.setText(s)
tmp=Integer.parseInt(s)
}
}
}
}
//按钮可以自己美化一下 希望可以帮到你
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.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
/**简易计算器，能够进行简单的计算
*
* @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
String str = "123+456-789*0.=/"
ArrayList<String>arrayList = new ArrayList<String>()//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")
frame.setLocation(300,300)
field = new JTextField(25)
allButtons = new JButton[16]
for(int i=0i<allButtons.lengthi++){
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=0i<allButtons.lengthi++){
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.setFont(new Font("宋体",Font.BOLD,24))
field.setBackground(new Color(100,200,200))
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(){
for(int i=0i<allButtons.lengthi++){
allButtons[i].addActionListener(this)
}
clearButton.addActionListener(this)
// backButton.addActionListener(this)
}
@Override
public void actionPerformed(ActionEvent e) {
String str = e.getActionCommand()//取得当前事件返回的值
if("0123456789.".indexOf(str)!=-1){
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
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("数据格式异常")
x = 0
}
}
else if(x == 2){
field.setText("数据格式错误.....")
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("数据格式异常")
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 ArrayList<String>getResult(ArrayList<String>list){
String res = null
String[] s = {"/","*","-","+"}
int i=0
if(list.size()>1){
for(i<s.length){
if(s[i].equals("/")){
for(int j=0j<list.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)
list.remove(j)
getResult(list)
}
}
i++
}
else if(s[i].equals("*")){
for(int j=0j<list.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=0j<list.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=0j<list.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
}
//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=0k<c.lengthk++){
c[k] = res.charAt(k)
}
for(int k=0k<c.lengthk++){
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()
}
}
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