无聊写了个，修复了下Bug：
import java.awt.event.ActionEventimport java.awt.event.ActionListener
import javax.swing.JButton
import javax.swing.JFrame
import javax.swing.JLabel
import javax.swing.JOptionPane
import javax.swing.JTextField
public class Calculate extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L
private JButton plus, reduce, multiply, divice, reset
private JTextField one, two, result
private boolean device_falg = false
private final int width = 400, height = 300
public Calculate() {
super("修改密码")
this.setLayout(null)
this.setSize(width, height)
init()
Layout()
}
public void init() {
plus = new JButton("加 ")
reduce = new JButton("减 ")
multiply = new JButton("乘 ")
divice = new JButton("除 ")
reset = new JButton("清空")
one = new JTextField()
two = new JTextField()
result = new JTextField()
}
public void Layout() {
this.add(new JLabel("第一个数")).setBounds(20, 10, 60, 80)
this.add(one).setBounds(100, 38, 100, 25)
this.add(new JLabel("第二个数")).setBounds(20, 40, 60, 80)
this.add(two).setBounds(100, 70, 100, 25)
this.add(new JLabel("结果")).setBounds(20, 85, 60, 80)
this.add(result).setBounds(100, 110, 100, 25)
this.add(plus).setBounds(70, 170, 80, 25)
this.add(reduce).setBounds(200, 170, 80, 25)
this.add(multiply).setBounds(70, 200, 80, 25)
this.add(divice).setBounds(200, 200, 80, 25)
this.add(reset).setBounds(300, 220, 80, 25)
plus.addActionListener(this)
reduce.addActionListener(this)
multiply.addActionListener(this)
divice.addActionListener(this)
reset.addActionListener(this)
this.setVisible(true)
this.setDefaultCloseOperation(DISPOSE_ON_CLOSE)
}
public boolean Format() {
boolean FLAG = false
boolean flag = false
String one = this.one.getText().toString().trim()
String two = this.two.getText().toString().trim()
if (one == null || one.equals("") || two == null || two.equals("")) {
JOptionPane.showMessageDialog(getParent(), "请输入完整信息!")
FLAG = false
flag = true
}
boolean boll_1 = one.matches("[\\d]{1,100}")
boolean boll_2 = two.matches("[\\d]{1,100}")
boolean boll_3 = one.matches("[\\d]{1,100}+[.]+[\\d]{1,100}")
boolean boll_4 = two.matches("[\\d]{1,100}+[.]+[\\d]{1,100}")
if (flag) {
return false
}
if ((boll_1 && boll_2) || (boll_3 && boll_4) || (boll_1 && boll_4)
|| (boll_3 && boll_2)) {
FLAG = true
} else {
JOptionPane.showMessageDialog(getParent(), "请输入数字!")
FLAG = false
}
if (FLAG && device_falg) {
if (Double.parseDouble(two) == 0) {
JOptionPane.showMessageDialog(getParent(), "被除数不能为0!")
FLAG = false
device_falg=false
}
}
return FLAG
}
public double Plus(double one, double two) {
return one + two
}
public double Multiply(double one, double two) {
return one * two
}
public double Divice(double one, double two) {
return one / two
}
public double Reduce(double one, double two) {
return one - two
}
public void Clear() {
one.setText("")
two.setText("")
result.setText("")
}
@Override
public void actionPerformed(ActionEvent e) {
Object o = e.getSource()
if (o == reset) {
Clear()
return
}
if (o == divice) {
device_falg = true
}
if (!Format()) {
return
}
double one = Double.parseDouble(this.one.getText())
double two = Double.parseDouble(this.two.getText())
double result = 0
if (o == plus) {
result = Plus(one, two)
} else if (o == reduce) {
result = Reduce(one, two)
} else if (o == multiply) {
result = Multiply(one, two)
} else if (o == divice) {
result = Divice(one, two)
}
this.result.setText("" + result)
}
public static void main(String[] args) {
new Calculate()
}
}
import java.awt.BorderLayout
import java.awt.Color
import java.awt.GridLayout
import java.awt.event.ActionEvent
import java.awt.event.ActionListener
import javax.swing.ImageIcon
import javax.swing.JButton
import javax.swing.JFrame
import javax.swing.JPanel
import javax.swing.JTextField
import javax.swing.SwingConstants
public class Jisuanqi extends JFrame implements ActionListener {
/**
*
*/
private static final long serialVersionUID = 1L
Result result = new Result() // 定义text的面板
Number_Key number_key = new Number_Key() // 定义按钮面板
// 当点击按钮+、-、*、/时，com = true
boolean com = false
// 当i=0时说明是我们第一次输入，字符串text不会累加
int i = 0
// 存放text的内容
String text = ""
// 存放点击按钮+、-、*、/之前的数值
double defbutton = 0
// +、-、*、/的代号分别为1，2，3，4
int symbol = 0
// 构造函数
Jisuanqi() {
super("WangJiao") // 设定标题
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE) // 设定关闭窗体时退出程序
JPanel pane = new JPanel() // 定义主面板
pane.setLayout(new BorderLayout())
setBounds(380, 220, 30, 80) // 前两个参数是在屏幕上显示的坐标，后两个是大小
// 替换图标
ImageIcon icon = new ImageIcon("F:1.GIF")
// Jisuanqi.class.getResource("APPLE.GIF")
// )
setIconImage(icon.getImage())
pane.add(result, BorderLayout.NORTH)
pane.add(number_key, BorderLayout.CENTER)
pane.add(number_key.equal, BorderLayout.SOUTH)
number_key.one.addActionListener(this) // 对1按钮添加监听事件
number_key.two.addActionListener(this) // 对2按钮添加监听事件
number_key.three.addActionListener(this) // 对3按钮添加监听事件
number_key.four.addActionListener(this) // 对4按钮添加监听事件
number_key.five.addActionListener(this) // 对5按钮添加监听事件
number_key.six.addActionListener(this) // 对6按钮添加监听事件
number_key.seven.addActionListener(this) // 对7按钮添加监听事件
number_key.eight.addActionListener(this) // 对8按钮添加监听事件
number_key.nine.addActionListener(this) // 对9按钮添加监听事件
number_key.zero.addActionListener(this) // 对0按钮添加监听事件
number_key.ce.addActionListener(this) // 对置零按钮添加监听事件
number_key.plus.addActionListener(this) // 对+按钮添加监听事件
number_key.equal.addActionListener(this) // 对=按钮添加监听事件
number_key.sub.addActionListener(this) // 对-按钮添加监听事件
number_key.mul.addActionListener(this) // 对*按钮添加监听事件
number_key.div.addActionListener(this) // 对/按钮添加监听事件
number_key.point.addActionListener(this) // 对.按钮添加监听事件
setContentPane(pane)
pack() // 初始化窗体大小为正好盛放所有按钮
}
// 各个按钮触发的事件
public void actionPerformed(ActionEvent e) {
/*
* 如果是点击数字按钮那么先要判断是否在此之前点击了+、-、*、/、=，如果是那么com=true 如果没有com=
* false或者是否点击数字键，如果是i = 1,如果没有 i = 0
*/
if (e.getSource() == number_key.one) {
if (com || i == 0) {
result.text.setText("1")
com = false
i = 1
} else {
text = result.text.getText()
result.text.setText(text + "1")
}
} else if (e.getSource() == number_key.two) {
if (com || i == 0) {
result.text.setText("2")
com = false
i = 1
} else {
text = result.text.getText()
result.text.setText(text + "2")
}
} else if (e.getSource() == number_key.three) {
if (com || i == 0) {
result.text.setText("3")
com = false
i = 1
} else {
text = result.text.getText()
result.text.setText(text + "3")
}
} else if (e.getSource() == number_key.four) {
if (com || i == 0) {
result.text.setText("4")
com = false
i = 1
} else {
text = result.text.getText()
result.text.setText(text + "4")
}
} else if (e.getSource() == number_key.five) {
if (com || i == 0) {
result.text.setText("5")
com = false
i = 1
} else {
text = result.text.getText()
result.text.setText(text + "5")
}
} else if (e.getSource() == number_key.six) {
if (com || i == 0) {
result.text.setText("6")
com = false
i = 1
} else {
text = result.text.getText()
result.text.setText(text + "6")
}
} else if (e.getSource() == number_key.seven) {
if (com || i == 0) {
result.text.setText("7")
com = false
i = 1
} else {
text = result.text.getText()
result.text.setText(text + "7")
}
} else if (e.getSource() == number_key.eight) {
if (com || i == 0) {
result.text.setText("8")
com = false
i = 1
} else {
text = result.text.getText()
result.text.setText(text + "8")
}
} else if (e.getSource() == number_key.nine) {
if (com || i == 0) {
result.text.setText("9")
com = false
i = 1
} else {
text = result.text.getText()
result.text.setText(text + "9")
}
}
/*
* 对于0这个按钮有一定的说法，在我的程序里不会出现如00000这样的情况，我加了判断条件就是
* 如果text中的数值=0就要判断在这个数值中是否有.存在?如果有那么就在原来数值基础之上添 加0否则保持原来的数值不变
*/
else if (e.getSource() == number_key.zero) { // result.text.getText()是得到text里内容的意思
if (com || i == 0) {
result.text.setText("0")
com = false
i = 1
} else {
text = result.text.getText()
if (Float.parseFloat(text) > 0 || Float.parseFloat(text) < 0) { // Float.parseFloat(text)就是类型转换了，下面都是一样
result.text.setText(text + "0")
} else {
if (text.trim().indexOf(".") == -1) {
result.text.setText(text)
} else {
result.text.setText(text + "0")
}
}
}
} else if (e.getSource() == number_key.ce) {
result.text.setText("0")
i = 0
com = true
// text = ""
defbutton = 0
}
/*
* 本程序不会让一个数值中出现2个以上的小数点.具体做法是:判断是否已经存在.存在就不添加, 不存在就添加.
*/
else if (e.getSource() == number_key.point) {
if (com || i == 0) {
result.text.setText("0.")
com = false
i = 1
} else {
text = result.text.getText()
if (text.trim().indexOf(".") == -1) {
result.text.setText(text + ".")
} else {
result.text.setText(text)
}
}
} // 获得点击+之前的数值
else if (e.getSource() == number_key.plus) {
com = true
i = 0
defbutton = Double.parseDouble(result.text.getText())
symbol = 1
} // 获得点击-之前的数值
else if (e.getSource() == number_key.sub) {
com = true
i = 0
defbutton = Double.parseDouble(result.text.getText())
symbol = 2
} // 获得点击*之前的数值
else if (e.getSource() == number_key.mul) {
com = true
i = 0
defbutton = Double.parseDouble(result.text.getText())
System.out.println(defbutton)
symbol = 3
} // 获得点击/之前的数值
else if (e.getSource() == number_key.div) {
com = true
i = 0
defbutton = Double.parseDouble(result.text.getText())
symbol = 4
} else if (e.getSource() == number_key.equal) {
switch (symbol) {
case 1: { // 计算加法
double ad = defbutton
+ Double.parseDouble(result.text.getText())
result.text.setText(ad + "")
i = 0
text = ""
break
}
case 2: { // 计算减法
double ad = defbutton
- Double.parseDouble(result.text.getText())
result.text.setText(String.valueOf(ad))
i = 0
text = ""
break
}
case 3: { // 计算乘法
double ad = defbutton
* Double.parseDouble(result.text.getText())
result.text.setText(ad + "")
i = 0
text = ""
break
}
case 4: { // 计算除法
double ad = defbutton
/ Double.parseDouble(result.text.getText())
result.text.setText(ad + "")
i = 0
text = ""
break
}
}
System.out.println(com)
}
System.out.println(result.text.getText())
}
@SuppressWarnings("deprecation")
public static void main(String[] args) {
Jisuanqi loveyou = new Jisuanqi()
loveyou.show()
}
}
// 计算器数字按钮定义面板
class Number_Key extends JPanel {
/**
*
*/
private static final long serialVersionUID = 1L
JButton zero = new JButton("0") // 数字键0
JButton one = new JButton("1") // 数字键1
JButton two = new JButton("2") // 数字键2
JButton three = new JButton("3") // 数字键3
JButton four = new JButton("4") // 数字键4
JButton five = new JButton("5") // 数字键5
JButton six = new JButton("6") // 数字键6
JButton seven = new JButton("7") // 数字键7
JButton eight = new JButton("8") // 数字键8
JButton nine = new JButton("9") // 数字键9
JButton plus = new JButton("+")
JButton sub = new JButton("-")
JButton mul = new JButton("*")
JButton div = new JButton("/")
JButton equal = new JButton("=")
JButton ce = new JButton("清零") // 置零键
JButton point = new JButton(".")
Number_Key() {
setLayout(new GridLayout(4, 4, 1, 1)) // 定义布局管理器为网格布局
setBackground(Color.blue) // 设置背景颜色
// 添加按钮
add(one)
add(two)
add(three)
add(four)
add(five)
add(six)
add(seven)
add(eight)
add(nine)
add(zero)
add(plus)
add(sub)
add(mul)
add(div)
add(point)
add(equal)
add(ce)
}
}
// 计算器显示结果的窗体
class Result extends JPanel {
/**
*
*/
private static final long serialVersionUID = 1L
// text先是输入和结果
JTextField text = new JTextField("0")
@SuppressWarnings("deprecation")
Result() { // 讲输入的数字或得到的结果在text的右边显示
text.setHorizontalAlignment(SwingConstants.RIGHT)
text.enable(false) // 文本框不能编辑
setLayout(new BorderLayout()) // 设定布局管理器边框布局
add(text, BorderLayout.CENTER) // text放置在窗体的中间
}
}
直接复制 保存成Jisuanqi .java可以直接运行了
