import java.awt.event.*
import javax.swing.*
import javax.swing.border.*
import java.util.LinkedList
import java.io.*
public class CalculatorWindow extends JFrame implements ActionListener{
NumberButton numberButton[]
OperationButton operationButton[]
JButton 小数点操作,正负号操作,退格操作,等号操作,清零操作,sin
JTextField resultShow //显示计算结果
JTextField showComputerProcess//显示当前计算过程
JTextArea saveComputerProcess//显示计算步骤
JButton saveButton,copyButton,clearButton
LinkedList<String>list //链表用来存放第一个运算数、运算符号和第二个运算数
HandleDigit handleDigit //负责处理ActionEvent事件
HandleOperation handleOperation
HandleBack handleBack
HandleClear handleClear
HandleEquality handleEquality
HandleDot handleDot
HandlePOrN handlePOrN
HandleSin handleSin
public CalculatorWindow(){
setTitle("计算器")
JPanel panelLeft,panelRight
list=new LinkedList<String>()
resultShow=new JTextField(10)
resultShow.setHorizontalAlignment(JTextField.RIGHT)
resultShow.setForeground(Color.blue)
resultShow.setFont(new Font("TimesRoman",Font.BOLD,16))
resultShow.setBorder(new SoftBevelBorder(BevelBorder.LOWERED))
resultShow.setEditable(false)
resultShow.setBackground(Color.white)
showComputerProcess=new JTextField()
showComputerProcess.setHorizontalAlignment(JTextField.CENTER)
showComputerProcess.setFont(new Font("Arial",Font.BOLD,16))
showComputerProcess.setBackground(Color.cyan)
showComputerProcess.setEditable(false)
saveComputerProcess=new JTextArea()
saveComputerProcess.setEditable(false)
saveComputerProcess.setFont(new Font("宋体",Font.PLAIN,16))
numberButton=new NumberButton[10]
handleDigit=new HandleDigit(list,resultShow,showComputerProcess)
for(int i=0i<=9i++){
numberButton[i]=new NumberButton(i)
numberButton[i].setFont(new Font("Arial",Font.BOLD,20))
numberButton[i].addActionListener(handleDigit)
}
operationButton=new OperationButton[4]
handleOperation=new HandleOperation(list,resultShow,
showComputerProcess,saveComputerProcess)
String 运算符号[]={"+","-","*","/"}
for(int i=0i<4i++){
operationButton[i]=new OperationButton(运算符号[i])
operationButton[i].setFont(new Font("Arial",Font.BOLD,20))
operationButton[i].addActionListener(handleOperation)
}
小数点操作=new JButton(".")
handleDot=new HandleDot(list,resultShow,showComputerProcess)
小数点操作.addActionListener(handleDot)
正负号操作=new JButton("+/-")
handlePOrN=new HandlePOrN(list,resultShow,showComputerProcess)
正负号操作.addActionListener(handlePOrN)
等号操作=new JButton("=")
handleEquality=new HandleEquality(list,resultShow,
showComputerProcess,saveComputerProcess)
等号操作.addActionListener(handleEquality)
sin=new JButton("sin")
handleSin=new HandleSin(list,resultShow,
showComputerProcess,saveComputerProcess)
sin.addActionListener(handleSin)
退格操作=new JButton("退格")
handleBack=new HandleBack(list,resultShow,showComputerProcess)
退格操作.addActionListener(handleBack)
清零操作=new JButton("C")
handleClear=new HandleClear(list,resultShow,showComputerProcess)
清零操作.addActionListener(handleClear)
清零操作.setForeground(Color.red)
退格操作.setForeground(Color.red)
等号操作.setForeground(Color.red)
sin.setForeground(Color.blue)
正负号操作.setForeground(Color.blue)
小数点操作.setForeground(Color.blue)
panelLeft=new JPanel()
panelRight=new JPanel()
panelLeft.setLayout(new BorderLayout())
JPanel centerInLeft=new JPanel()
panelLeft.add(resultShow,BorderLayout.NORTH)
panelLeft.add(centerInLeft,BorderLayout.CENTER)
centerInLeft.setLayout(new GridLayout(4,5))
centerInLeft.add(numberButton[1])
centerInLeft.add(numberButton[2])
centerInLeft.add(numberButton[3])
centerInLeft.add(operationButton[0])
centerInLeft.add(清零操作)
centerInLeft.add(numberButton[4])
centerInLeft.add(numberButton[5])
centerInLeft.add(numberButton[6])
centerInLeft.add(operationButton[1])
centerInLeft.add(退格操作)
centerInLeft.add(numberButton[7])
centerInLeft.add(numberButton[8])
centerInLeft.add(numberButton[9])
centerInLeft.add(operationButton[2])
centerInLeft.add(sin)
centerInLeft.add(numberButton[0])
centerInLeft.add(正负号操作)
centerInLeft.add(小数点操作)
centerInLeft.add(operationButton[3])
centerInLeft.add(等号操作)
panelRight.setLayout(new BorderLayout())
panelRight.add(showComputerProcess,BorderLayout.NORTH)
saveButton=new JButton("保存")
copyButton=new JButton("复制")
clearButton=new JButton("清除")
saveButton.setToolTipText("保存计算过程到文件")
copyButton.setToolTipText("复制选中的计算过程")
clearButton.setToolTipText("清除计算过程")
saveButton.addActionListener(this)
copyButton.addActionListener(this)
clearButton.addActionListener(this)
panelRight.add(new JScrollPane(saveComputerProcess),BorderLayout.CENTER)
JPanel southInPanelRight=new JPanel()
southInPanelRight.add(saveButton)
southInPanelRight.add(copyButton)
southInPanelRight.add(clearButton)
panelRight.add(southInPanelRight,BorderLayout.SOUTH)
JSplitPane split=new JSplitPane
(JSplitPane.HORIZONTAL_SPLIT,panelLeft,panelRight)
add(split,BorderLayout.CENTER)
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
setVisible(true)
setBounds(100,50,528,258)
validate()
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==copyButton)
saveComputerProcess.copy()
if(e.getSource()==clearButton)
saveComputerProcess.setText(null)
if(e.getSource()==saveButton){
JFileChooser chooser=new JFileChooser()
int state=chooser.showSaveDialog(null)
File file=chooser.getSelectedFile()
if(file!=null&&state==JFileChooser.APPROVE_OPTION){
try{ String content=saveComputerProcess.getText()
StringReader read=new StringReader(content)
BufferedReader in= new BufferedReader(read)
FileWriter outOne=new FileWriter(file)
BufferedWriter out= new BufferedWriter(outOne)
String str=null
while((str=in.readLine())!=null){
out.write(str)
out.newLine()
}
in.close()
out.close()
}
catch(IOException e1){}
}
}
}
public static void main(String args[]){
new CalculatorWindow()
}
}
import java.awt.*import java.awt.event.*
import javax.swing.*//导包
class MyClass extends JFrame
//创建一个MyClass类继承JFrame框架的窗口类，
//也就是说JFrame里有的功能MyClass都能实现
{
JLabel a1=new JLabel("第一个数")
//创建一个显示“第一个数”的标签
JLabel a2=new JLabel("第二个数")
JLabel a3=new JLabel("运算结果")
JTextField b1=new JTextField(5)
//创建一个文本框、默认长度为5，用来输入运算数字,当然也可以默认为空
JTextField b2=new JTextField(5)
JTextField b3=new JTextField(5)
//创建一个用于显示运算结果的标签，也可以创建一个标签来显示
JButton a=new JButton("加")
//创建一个用于加法计算的按钮,点击时进行加法运算
JButton b=new JButton("减")
JButton c=new JButton("乘")
JButton d=new JButton("除")
JPanel jp1=new JPanel()//创建一个面板，用来放控件
JPanel jp2=new JPanel()
JPanel jp3=new JPanel()
MyClass()//构造函数，用来初始化的
{
setLayout(new GridLayout(3,1))//添加一个四行四列的布局管理器
jp1.setLayout(new FlowLayout())//设置JP1面板为流式布局管理器
jp1.setLayout(new FlowLayout())
//将a1,b1,a2,b2四个控件添加到jp1面板中
jp1.add(a1)
jp1.add(b1)
jp1.add(a2)
jp1.add(b2)
jp1.add(a3)
//将a,b,c,d四个控件添加到jp2面板中
jp2.add(a)
jp2.add(b)
jp2.add(c)
jp2.add(d)
jp3.add(a3)
jp3.add(b3)
//将jp1,jp2,jp3三个面板添加到窗口中
add(jp1)
add(jp3)
add(jp2)
Object e
a.addActionListener(new ActionListener()
//创建一个匿名的事件监听器
{
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
double x=Double.valueOf(b1.getText().toString())
//获取第一个输入数，并将其由String型转换成double型
double y=Double.valueOf(b2.getText().toString())
//获取第二个输入数，并将其由String型转换成double型
b3.setText(""+(x+y))
//将运算结果在b3这个文本框中显示
}
})
b.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
double x=Double.valueOf(b1.getText().toString())
double y=Double.valueOf(b2.getText().toString())
b3.setText(""+(x-y))
}
})
c.addActionListener(new ActionListener()//创建一个匿名的事件监听器
{
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
double x=Double.valueOf(b1.getText().toString())
double y=Double.valueOf(b2.getText().toString())
b3.setText(""+(x*y))
}
})
d.addActionListener(new ActionListener()//创建一个匿名的事件监听器
{
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
double x=Double.valueOf(b1.getText().toString())
double y=Double.valueOf(b2.getText().toString())
//因为0不能做除数，所以在这里需要进行判断
if(y==0)
{
b3.setText("错误")
}
else
{
b3.setText(""+(x/y))
}
}
})
//下面的是设置窗口的属性
this.setTitle("计算器")//设置窗口的标题
//this.setSize(400,400)//设置窗口的大小，也可以改成this.pack()
this.pack()
this.setDefaultCloseOperation(DISPOSE_ON_CLOSE)//设置关闭属性
this.setVisible(true)//设置窗口的可见性
}
public static void main(String[] args)//主函数
{
new MyClass()
}
}
