## 荣耀自制计算器
登录界面
package wangrongchang;
import java.awt.Image;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Font;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
public class Login //extends JFrame
{
private static JButton bt1;//注册按钮
private static JButton bt2;//登陆按钮
private static JButton bt3;//退出按钮
private static JLabel jl1;//登陆的版面
private static JFrame jf1;//登录的框架
private static JTextField jt1;//id
private static JPasswordField jt2;//密码
private static JLabel jl_id;//id标签
private static JLabel jl_password;//密码标签
private static String t1,t2;
private static int pd=0;
public Login()
{
Font font=new Font("楷体",Font.PLAIN,20);
jf1=new JFrame("欢迎登录计算器小程序");
jf1.setSize(500,500);
//给登录界面添加背景图片
ImageIcon bgim = new ImageIcon(Login.class.getResource("tt.jpg")) ;//背景图案
bgim.setImage(bgim.getImage().
getScaledInstance(bgim.getIconWidth(),
bgim.getIconHeight(),Image.SCALE_DEFAULT));
jl1=new JLabel();
jl1.setIcon(bgim);
//账号栏
jl_id=new JLabel("账号：");
jl_id.setBounds(40,60,60,30);
jl_id.setFont(font);
//密码栏
jl_password=new JLabel("密码：");
jl_password.setBounds(40,120,60,30);
jl_password.setFont(font);
//注册按钮
bt1=new JButton("注册");
bt1.setBounds(40, 250, 100,50);
bt1.setFont(font);
//登录按钮
bt2=new JButton("登录");
bt2.setBounds(170, 250, 100,50);
bt2.setFont(font);
//退出按钮
bt3=new JButton("退出");
bt3.setBounds(300, 250, 100,50);
bt3.setFont(font);
//加入文本框
jt1=new JTextField();
jt1.setBounds(150,50,250,50);
jt1.setFont(font);
jt2=new JPasswordField();
jt2.setBounds(150,120,250,50);
jt2.setFont(font);
jl1.add(jt1);
jl1.add(jt2);
jl1.add(jl_id);
jl1.add(jl_password);
jl1.add(bt1);
jl1.add(bt2);
jl1.add(bt3);
jf1.add(jl1);
jf1.setVisible(true);
jf1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf1.setLocation(400,200);
//注册
bt1.addActionListener(new ActionListener() {
@SuppressWarnings("deprecation")
public void actionPerformed(ActionEvent e){
pd=1;
t1=jt1.getText();
t2=jt2.getText();
String filename="users.txt";
try {
FileWriter writer=new FileWriter(filename);
BufferedWriter bw=new BufferedWriter(writer);
bw.write("id:"+t1+"&&"+"Password:"+t2);
bw.newLine();
bw.close();
writer.close();
}catch(IOException ex) {ex.printStackTrace();}
jt1.setText("");
jt2.setText("");
JOptionPane.showMessageDialog(null,"注册成功！你的账号是："+t1+"密码是："+t2);
}
});
//登录事件
bt2.addActionListener(new ActionListener() {
@SuppressWarnings("deprecation")
public void actionPerformed(ActionEvent e) {
if(pd==1||pd==0)
{
File filename=new File("users.txt");
try {
FileReader inone=new FileReader(filename);
BufferedReader intwo=new BufferedReader(inone);
String s=null;
int b=1;
while((s=intwo.readLine())!=null) {
StringBuilder stringBuilder=new StringBuilder();
stringBuilder.append("id:");
stringBuilder.append(jt1.getText());
stringBuilder.append("&&");
stringBuilder.append("Password:");
stringBuilder.append(jt2.getText());
String ak=stringBuilder.toString();
if(s.equals(ak)) {
JOptionPane.showMessageDialog(null,"登录成功！");
jt1.setText("");
jt2.setText("");
//new Calculator().init();
new User();
jf1.dispose();
b=0;
break;
}
}
intwo.close();
inone.close();
if(b==1) {JOptionPane.showMessageDialog(null,"登陆失败！检查账号密码是否正确或请注册后登录",null,JOptionPane.ERROR_MESSAGE, null);
jt1.setText("");
jt2.setText("");
}
if(b==0) {//dispose();
return ;}
}catch(IOException ex) {ex.printStackTrace();}
}
}
});
bt3.addActionListener(new ActionListener() {
//@SuppressWarnings("deprecation")
public void actionPerformed(ActionEvent e){System.exit(0);}
});}
public static void main(String[] args) {
new Login();
}
}
计算机界面
package wangrongchang;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.border.BevelBorder;
import javax.swing.JTextField;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.SystemColor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.NumberFormat;
import java.util.regex.Pattern;
public class User
{
//定义组件
String key[]={"MC","MR","MS","M+","M-","sin","cos","tan","log","π","1", "2", "3", "+", "x²", "4", "5", "6", "-", "√", "7", "8", "9", "*", "1/x", "0", "(",
")", "÷", "n!", ".","%", "←", "c", "="};
private JMenuBar jmb=new JMenuBar();
private JMenu []jm=new JMenu[3];
JMenuItem[] jmi=new JMenuItem[6];
JTextField[] jtf=new JTextField[3];//创建方框;
JButton[] jb=new JButton[key.length];
private JPanel jps=new JPanel();
private JPanel jpb=new JPanel();
private JFrame jf=new JFrame();
//操作变量
private String result=" ";
private String store="";//缓存字符串
private String jtf2str;//给第三个文本框存放操作数
boolean newDigital=true;//是否输入新的数的状态
double d;//一元运算变量；
double d1;//二元运算的前操作的数
double d2;//二元运算的后操作数
public User()
{
//创建组件
jm[0]=new JMenu("查看(V)");
jm[1]=new JMenu("编辑(E)");
jm[2]=new JMenu("帮助(H)");
jmi[0]=new JMenuItem("二进制转换");
jmi[1]=new JMenuItem("八进制转换");
jmi[2]=new JMenuItem("十六进制转换");
jmi[3]=new JMenuItem("复制(C)");
jmi[4]=new JMenuItem("粘贴(P)");
jmi[5]=new JMenuItem("关于计算器(A)");
for(int i=0;i<6;i++)
jmi[i].addActionListener(new ButtonListener());
for(int i=0;i<key.length;i++) {
jb[i]=new JButton(key[i]);
jb[i].setContentAreaFilled(false);
jb[i].setFocusable(false);
jb[i].addActionListener(new ButtonListener());//给每个按钮添加监听处理
jpb.add(jb[i]);
}
initGUI();//设置布局
jf.setTitle("欢迎使用计算器");
jf.setIconImage(new ImageIcon("t4.jpg").getImage());//设置背景
jf.setSize(500,500);//设置大小
jf.setLocation(200,200);//设置初始位置
jf.setVisible(true);//显示
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置默认到关闭操作
}
//设置布局
public void initGUI()
{
jf.setJMenuBar(jmb);
jmb.add(jm[0]);
jmb.add(jm[1]);
jmb.add(jm[2]);
jm[0].add(jmi[0]);
jm[0].add(jmi[1]);
jm[0].add(jmi[2]);
jm[1].add(jmi[3]);
jm[1].add(jmi[4]);
jm[2].add(jmi[5]);
//显示记忆索引值的文本框
jtf[0]=new JTextField();
jtf[0].setEditable(false);
jtf[0].setHorizontalAlignment(JTextField.RIGHT);
//显示M
jtf[1]=new JTextField();
jtf[1].setEditable(false);
jtf[1].setHorizontalAlignment(JTextField.RIGHT);
//显示输出结果
jtf[2]=new JTextField("0");
jtf[2].setEditable(false);
jtf[2].setHorizontalAlignment(JTextField.RIGHT);
jtf[2].setFont(new Font("arial",Font.BOLD,22));
jtf[2].setForeground(Color.BLUE);
jps.setLayout(new BorderLayout());
jpb.setLayout(new GridLayout(7,5,4,4));
jpb.setBorder(
new BevelBorder(BevelBorder.RAISED,new Color(180,180,180),null,SystemColor.scrollbar,null));
//按键
jps.add(jtf[0],BorderLayout.NORTH);
jps.add(jtf[1],BorderLayout.CENTER);
jps.add(jtf[2],BorderLayout.AFTER_LAST_LINE);
jf.add(jpb,BorderLayout.CENTER);
jf.add(jps,BorderLayout.NORTH);
}
/**
* 事件处理
*
* @author
*
*/
public class ButtonListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
String s1=e.getActionCommand();
String content = String.valueOf(s1);
boolean flag1 = jtf[0].getText().contains("=");
// 输入处理的结果赋值给result
result= parseInputStr(result,content);
jtf[0].setText(result);
// 控制计算结果后继续输入
//store=result;
jtf2str=jtf[2].getText();//获取文本框中的字符串
if(e.getSource()==jmi[0]) {//二进制转换
int n=Integer.parseInt(jtf2str);
jtf[2].setText(Integer.toBinaryString(n));
}
if(e.getSource()==jmi[1]){//八进制转换
int n=Integer.parseInt(jtf2str);
jtf[2].setText(Integer.toOctalString(n));
}
if(e.getSource()==jmi[2]) {//十六进制转换
int n=Integer.parseInt(jtf2str);
jtf[2].setText(Integer.toHexString(n));
}
if(e.getSource()==jmi[3]) {//复制
store=jtf2str;
}
if(e.getSource()==jmi[4]) {//粘贴
jtf2str=store;
if(jtf2str=="")
jtf[2].setText("0");
else
jtf[2].setText(jtf2str);
}
if(e.getSource()==jmi[5])//关于计算器
{
JOptionPane.showMessageDialog(null,"!!-_-!!王荣昌制作!!-_-!!");
}
if(s1.equals("MC"))
jtf[1].setText("");
if(s1.equals("MR"))
jtf[2].setText(store);
if(s1.equals("MS")) {
jtf[1].setText("M");
result=jtf2str;
}
if(s1.equals("M+")) {
d1=Double.parseDouble(store);
d2=Double.parseDouble(jtf2str);
result=String.valueOf(d1+d2);
}
if(s1.equals("M-")) {
d1=Double.parseDouble(store);
d2=Double.parseDouble(jtf2str);
result=String.valueOf(d1-d2);
}
if (flag1 && content.matches("^\\d")) {
result= content;
jtf[0].setText(result);
jtf[2].setText("0");
}
if (content.equals("←"))
backSpace();// 后退
if (content.equals("c"))
clear();// 清屏
if (result.endsWith("=")) {
String str = jtf[0].getText();
// 如果（大于）数，报错“缺少）”
if (countsOfSubstringInString(result, "(") > countsOfSubstringInString(result, ")")) {
jtf[2].setText("')' is missing!");
result= result.substring(0,result.length() - 1);
}
else if (result.contains("!")) {
int index = indexOfNumberStart(result.substring(0,result.indexOf('!')));
String s = result.substring(index,result.indexOf('!'));
if (parse(s) > 100)
jtf[2].setText("the argument for factorial is too large!");
else
calculate();
}
// 如果出现根号下负数，报错“负数没有平方根”
else if (str.indexOf("sqt") != -1) {
int index = indexOfOpecifiedMirrorBracket(str, '(',
str.indexOf("sqt") + 3);
String s = str.substring(str.indexOf("sqt") + 4, index);
if (parse(s) < 0.0) {
jtf[2].setText("negative number do not have a square root!");
} else
calculate();
}
//如果出现log下的负数,报错"真数要大于0"
else if(str.indexOf("log")!=-1) {
int index = indexOfOpecifiedMirrorBracket(str, '(',
str.indexOf("log") + 3);
String s = str.substring(str.indexOf("log") + 4, index);
if (parse(s) <=0.0) {
jtf[2].setText("The true number should be greater than 0!");
} else
calculate();
}
// 如果出现/0.0报错“0不能作为被除数”
else if (jtf[0].getText().indexOf("/") != -1) {
String s = "";
int indexofdiv = indexOfNumberEnd(str, str.indexOf("/"));
s = str.substring(str.indexOf("/") + 1, indexofdiv);
if (parse(s) == Double.parseDouble("0")) {// 如果s=0
jtf[2].setText("0 can not be the dividend!");
result=result.substring(0,result.length() - 1);
} else
calculate();
} else
calculate();
}
}
}
public static void main(String[] args) {
new User();
}
//结果格式化
public void calculate() {
result= String.valueOf(parse(result.substring(0,result.length() - 1)));
jtf[2].setText(formatResult(result));
}
// 处理显示结果
public String formatResult(String result) {
String finalResult = "";
Double d = Double.valueOf(result);
NumberFormat nf = NumberFormat.getInstance();
nf.setGroupingUsed(false);
if (Math.abs(d) >= 1 || Math.abs(d) == 0)
finalResult = nf.format(d);
else
finalResult = d.toString();
return finalResult;
}
/**
* 后退处理
*/
public void backSpace() {
if (result.length() == 1 ||result.equals("")) {
result= " ";
jtf[0].setText(result);
} else {
result=result.substring(0, result.length() - 1);
if (result.endsWith(" "))
result= result.substring(0,result.length() - 1);
jtf[0].setText(result);
}
jtf[2].setText(" ");
}
/**
* 清屏处理
*
* @param content
*/
public void clear() {
jtf[2].setText(" ");
jtf[0].setText(" ");
result=" ";
jtf[2].setText("0");
}
/**
* 输入处理
*
* @param result
* @param content
* @return
*/
public static String parseInputStr(String result, String content) {
// 刚开始输入只能输入数字、π、-或者(
if (result.equals(" ") || result.equals("")) {
if (content.matches("\\d+|π|\\-|\\(*")) {
result = "".concat(content);
}
}
// 左括号数大于右括号数才能输入右括号
else if (content.equals(")")) {
boolean b = result.matches(".*\\d$|.*\\)$");// result以数字结尾或者右括号结尾
if (countsOfSubstringInString(result, "(") > countsOfSubstringInString(result, ")") && b)
result = result.concat(content);
else
result = result.concat("");
}
// 以数字结尾
else if (Pattern.matches(".*\\d$|.*π$", result)) {
// 不可输入00
if (lastNumberOfStr(result).matches("^0+")
&& /* !content.equals(".") &&!content.equals("=") && */ !content.matches("\\+|\\-|\\*|÷|\\.|="))
result = result + "";
// 数字后面跟x²，1/x，√
else if (content.matches("x²|1/x|sin|cos|tan|log|√|n!")) {
result = parseDigitEndWithFuncthion(result, content);
}
// x.y后不能接小数点，如2.1后不能输入点，不能出现2.1.2
else if (Pattern.matches(".*\\.\\d+$", result)) {// 结果以.数字结尾
result = result.concat(content.matches("\\d*|\\+|\\-|\\*|\\%|÷|\\)|=") ? content : "");
}
// 数字或小数点
else if (content.matches("\\d|\\."))
result = result.concat(content);
else
result = result.concat(content.matches("\\+|\\-|\\*|\\%|÷|\\)|=") ? " " + content : "");
}
// 以小数点结尾
else if (Pattern.matches(".*\\.$", result) && Pattern.matches("^\\d", content)) {
result = result.concat(content);
}
// 以左括号结尾
else if ((result).matches(".*\\($")) {
result = result.concat(content.matches("\\d*|π|\\-|\\(") ? content : "");
}
// 以右括号结尾
else if (Pattern.matches(".*\\)$", result)) {
if (content.matches("\\+|\\-|\\*|\\%|÷|=")) {
result = result + " " + content;
}
if (content.matches("\\)")) {
result = result + content;
}
if (content.matches("x²|√|1/x|sin|cos|tan|log")) {
result = parseBrackets(result, content);
}
}
// 以加减乘除结尾
else if (result.matches(".*\\+$|.*\\-$|.*\\*$|.*÷$|.*/$|.*\\%$")) {
result = result.replaceAll("÷", "/");
if (result.matches(".*\\-$")) {// 以减号结尾
if (result.length() == 1)
result = result + (content.matches("\\(|\\d|π") ? content : "");// 负号
else if (result.length() > 1) {// 减号或左括号负号
boolean b = result.charAt(result.length() - 2) == '(';
if (b)
result = result + (content.matches("\\(|\\d|π") ? content : "");// 左括号负号
else
result = result + (content.matches("\\(|\\d|π") ? " " + content : "");// 减号
}
} else
result = result + (content.matches("\\(|\\d|π") ? " " + content : "");
}
// 以！结尾
else if (Pattern.matches(".*!$", result)) {
result = result + (content.matches("\\+|\\-|\\%|\\*|/|=|\\)") ? content : "");
}
return result;
}
/**
* 计算处理
*
* @param content
* @return
*/
public static double parse(String content) {
// 处理π
if (content.contains("π"))
content =content.replace("π",""+Math.PI);
if (content.contains("1/x"))
content = content.replace("1/x", "rec");
// 处理乘以负数*-
if (content.contains("*-") || content.matches(".*(\\*\\s\\-).*")) {
content = content.replaceAll("\\*\\s\\-", "*-");
content = multiplicationAndDivisionOfNegative(content, "*");
}
// 处理除以负数/-
if (content.contains("/-") || content.matches(".*(/\\s\\-).*")) {
content = content.replaceAll("/\\s\\-", "/-");
content = multiplicationAndDivisionOfNegative(content, "/");
}
// --转成+
if (content.contains("--") || content.matches(".*(\\-\\s\\-).*")) {
content = content.replaceAll("\\-\\s\\-", "+");
content = content.replaceAll("\\-\\-", "+");
}
// 处理平方
int index = content.indexOf("sqr");
if (index != -1) {
int endindex = indexOfOpecifiedMirrorBracket(content, '(', index + 3);
String d = "(" + content.substring(index + 3, endindex + 1) + "*"
+ content.substring(index + 3, endindex + 1) + ")";
return parse(content.substring(0, index) + d + content.substring(endindex + 1));
}
//处理sin
index=content.indexOf("sin");
if (index != -1) {
int endindex = indexOfOpecifiedMirrorBracket(content, '(', index + 3);
double d=Math.sin(parse(content.substring(index+3,endindex+1)));
return parse(content.substring(0, index) + d + content.substring(endindex + 1));
}
//处理cos
index=content.indexOf("cos");
if (index != -1) {
int endindex = indexOfOpecifiedMirrorBracket(content, '(', index + 3);
double d=Math.cos(parse(content.substring(index+3,endindex+1)));
return parse(content.substring(0, index) + d + content.substring(endindex + 1));
}
//处理tan
index=content.indexOf("tan");
if (index != -1) {
int endindex = indexOfOpecifiedMirrorBracket(content, '(', index + 3);
double d=Math.tan(parse(content.substring(index+3,endindex+1)));
return parse(content.substring(0, index) + d + content.substring(endindex + 1));
}
//处理log
index=content.indexOf("log");
if (index != -1) {
int endindex = indexOfOpecifiedMirrorBracket(content, '(', index + 3);
double d=Math.log(parse(content.substring(index+3,endindex+1)));
return parse(content.substring(0, index) + d + content.substring(endindex + 1));
}
// 处理开方
index = content.indexOf("sqt");
if (index != -1) {
int endindex = indexOfOpecifiedMirrorBracket(content, '(', index + 3);
double d = Math.sqrt(parse(content.substring(index + 3, endindex + 1)));
return parse(content.substring(0, index) + d + content.substring(endindex + 1));
}
// 处理求倒
index = content.indexOf("rec");
if (index != -1) {
int endindex = indexOfOpecifiedMirrorBracket(content, '(', index + 3);
double d = parse("1/" + content.substring(index + 3, endindex + 1));
return parse(content.substring(0, index) + d + content.substring(endindex + 1));
}
// 处理括号
int startindex = content.indexOf("(");
boolean b = countsOfSubstringInString(content, "(") == countsOfSubstringInString(content, ")");
if (startindex != -1 && b) {
int endindex = indexOfFirstMirrorBracket(content, '(');
double d = parse(content.substring(startindex + 1, endindex));
return parse(content.substring(0, startindex) + d + content.substring(endindex + 1));
}
// 处理阶乘，由于阶乘很容易越界，故不考虑括号阶乘了
index = content.indexOf("!");
if (index != -1) {
double d = factorial(parse(content.substring(indexOfLeftOperator(content, index) + 1, index)));
return parse(
content.substring(0, indexOfLeftOperator(content, index) + 1) + d + content.substring(index + 1));
}
// 处理加法
index = content.indexOf("+");
if (index != -1) {
return parse(content.substring(0, index)) + parse(content.substring(index + 1));
}
// 处理减法
index = content.lastIndexOf("-");
if (index != -1) {
return parse(content.substring(0, index)) - parse(content.substring(index + 1));
}
//处理求模
index=content.indexOf("%");
if(index!=-1)
return parse(content.substring(0,index)) % parse(content.substring(index+1));
// 处理乘法
index = content.indexOf("*");
if (index != -1) {
return parse(content.substring(0, index)) * parse(content.substring(index + 1));
}
// 处理除法
index = content.lastIndexOf("/");
if (index != -1) {
return parse(content.substring(0, index)) / parse(content.substring(index + 1));
}
// 处理空格
if (content.equals("") || content.equals(" "))
content = "0";
// 最后结果
return Double.parseDouble(content);
}
/**
* 阶乘实现
*/
public static double factorial(double d) {
return (d == 0.0 ? 1 : d * factorial(d - 1));
}
/**
* 字符串中某子字符串的数量
*/
public static int countsOfSubstringInString(String string, String substring) {
int sum = 0;
String subStrHead = "";
String subStrTrail = "";
while (string.contains(substring)) {
sum++;
subStrHead = string.substring(0, string.indexOf(substring));
subStrTrail = string.substring(subStrHead.length() + substring.length());
string = subStrHead + subStrTrail;
}
return sum;
}
/**
* 找最左边的左括号的镜像括号的位置，或者最右边的右括号的镜像括号的位置
*/
public static int indexOfFirstMirrorBracket(String s, char c) {
int indexresult = -1;
int sum = 0;
if (countsOfSubstringInString(s, "(") == countsOfSubstringInString(s, ")")) {
if (c == '(') {
int index = s.indexOf(c) - 1;
do {
index++;
if (s.charAt(index) == '(')
sum++;
if (s.charAt(index) == ')')
sum--;
} while (sum != 0 && index < s.length());
indexresult = index - 1;
}
if (c == ')') {
int index = s.lastIndexOf(c);
do {
if (s.charAt(index) == ')') {
sum++;
}
if (s.charAt(index) == '(')
sum--;
index--;
} while (sum != 0 && index >= 0);
indexresult = index;
}
}
return indexresult + 1;
}
/**
* 指定位置的括号的镜像括号
*/
public static int indexOfOpecifiedMirrorBracket(String s, char c, int index) {
int indexresult = -1;
int sum = 0;
int startIndex = -1;
int endIndex = -1;
StringBuffer sb = new StringBuffer(s);
if (countsOfSubstringInString(s, "(") == countsOfSubstringInString(s, ")")) {
if (index == 0 || index == s.length() - 1)
return indexOfFirstMirrorBracket(s, c);
else if (c == '(') {
sum = countsOfSubstringInString(s.substring(0, index), String.valueOf(c));
while (sum != 0) {
startIndex = sb.indexOf("(");
endIndex = indexOfFirstMirrorBracket(sb.toString(), c);
sb = sb.replace(startIndex, startIndex + 1, "a").replace(endIndex, endIndex + 1, "a");
sum--;
}
indexresult = indexOfFirstMirrorBracket(sb.toString(), c);
} else if (c == ')') {
sum = countsOfSubstringInString(s.substring(index + 1), String.valueOf(c));
while (sum != 0) {
startIndex = sb.indexOf(")");
endIndex = indexOfFirstMirrorBracket(sb.toString(), c);
sb = sb.replace(startIndex, startIndex + 1, "a").replace(endIndex, endIndex + 1, "a");
sum--;
}
indexresult = indexOfFirstMirrorBracket(sb.toString(), c);
}
}
return indexresult;
}
/**
* 某个位置前面最近一个算术运算符的位置
*
* @param s
* @param specifiedIndex
* @return
*/
public static int indexOfLeftOperator(String s, int specifiedIndex) {
int temp = -1;
if (specifiedIndex >= 1 && s.substring(0, specifiedIndex).matches(".*(\\-|\\+|\\%|\\*|/).*")) {
do {
specifiedIndex--;
} while (!String.valueOf(s.charAt(specifiedIndex)).matches("\\+|\\-|\\%|\\*|/"));
temp = specifiedIndex;
}
return temp;
}
/**
* 某个位置后面最近一个算术运算符的位置
*/
public static int indexOfRightOperator(String s, int specifiedIndex) {
int temp = -1;
boolean b = specifiedIndex >= 0 && specifiedIndex <= s.length() - 1
&& s.substring(specifiedIndex + 1).matches(".*(\\+|\\-|\\%|\\*|/).*");
if (b) {
while (!String.valueOf(s.charAt(specifiedIndex + 1)).matches("\\+|\\-|\\%|\\*|/")) {
specifiedIndex++;
}
temp = specifiedIndex + 1;
}
return temp;
}
/**
* 处理算式中的*-和/-
*/
public static String multiplicationAndDivisionOfNegative(String content, String operator) {
int indexofoperator = content.indexOf(operator);
int startindex = indexOfLeftOperator(content, indexofoperator);// indexofoperator左边最近的运算符+-*/的位置
if (startindex == -1) {
content = "-" + content.substring(0, content.indexOf(operator) + 1)
+ content.substring(content.indexOf(operator) + 2);
}
if (startindex != -1) {
if (content.substring(indexofoperator, indexofoperator + 2).equals(operator + "-")) {
String tempstr = "-" + content.substring(startindex + 1, indexofoperator + 1);
content = content.substring(0, startindex + 1) + tempstr + content.substring(indexofoperator + 2);
}
}
return content;
}
/**
* 找数字结尾的字符串结束位置开始往前的一个完整数字的位置
*
* @param result
* @return
*/
public static int indexOfNumberStart(String result) {
int resultIndex = -1;
int indexOfOperator = indexOfLeftOperator(result, result.length() - 1);// 该位置前面第一个运算符位置
if (indexOfOperator == -1) {//前面没有运算符
indexOfOperator = result.lastIndexOf('(');
if (indexOfOperator == -1)
resultIndex = 0;
else
resultIndex = indexOfOperator + 1;
} else {
if(result.charAt(indexOfOperator) == '-' && result.charAt(indexOfOperator + 1) != ' ')
resultIndex = indexOfOperator;
else{
while (result.charAt(indexOfOperator + 1) == '(' || result.charAt(indexOfOperator + 1) == ' ')
indexOfOperator++;
resultIndex = indexOfOperator + 1;
}
}
return resultIndex;
}
/**
* 找运算符位置往后完整数字的位置
*
* @param result
* @param index
* @return
*/
public static int indexOfNumberEnd(String result, int index) {
int resultIndex = -1;
int indexOfOperator = indexOfRightOperator(result, index + 1);
String subStrStart = result.substring(0, index + 1);
String subStrEnd = result.substring(index + 1);
if (indexOfOperator == -1) {// 没有运算符
if (result.substring(index + 1).contains("(")) {
int startIndex = subStrStart.length() + subStrEnd.indexOf('(');
int endIndex = indexOfOpecifiedMirrorBracket(result, '(', startIndex);
resultIndex = endIndex + 1;
} else if (indexOfOperator == -1) {
while (index < result.length() && String.valueOf(result.charAt(index + 1)).matches("\\s|\\d|\\."))
index++;
resultIndex = index + 1;
}
} else {
if (result.substring(index + 1, indexOfOperator).contains("(")) {
int startIndex = subStrStart.length() + subStrEnd.indexOf('(');
int endIndex = indexOfOpecifiedMirrorBracket(result, '(', startIndex);
resultIndex = endIndex + 1;
} else
resultIndex = indexOfOperator;
}
return resultIndex;
}
/**
* 以数字结尾的字符串的最后一个完整的数字字符串
*
* @param result
* @return
*/
public static String lastNumberOfStr(String result) {
int indexTemp = indexOfLeftOperator(result, result.length() - 1);
boolean b = String.valueOf(result.charAt(result.length() - 1)).matches("\\d");
if (indexTemp <= result.length() - 1 && b) {
while (!String.valueOf(result.charAt(indexTemp + 1)).matches("\\d"))
indexTemp++;
return result.substring(indexTemp + 1);
} else
return "";
}
/**
* 右括号后面跟平方、求倒、开方
*
* @param result
* @param content
* @return
*/
public static String parseBrackets(String result, String content) {
String temp = "";
int startIndex = indexOfFirstMirrorBracket(result, ')');
int indexOfOperator = indexOfLeftOperator(result, startIndex);
String substrhead = "";
String substrtrail = "";
if (indexOfOperator == -1)
substrtrail = result;
else {
substrhead = result.substring(0, indexOfOperator + 2);
substrtrail = result.substring(indexOfOperator + 2);
}
if (content.equals("√")) {
if (substrtrail.startsWith("(") && substrtrail.endsWith(")")
&& indexOfFirstMirrorBracket(substrtrail, '(') == substrtrail.length() - 1)
temp = substrhead + "sqt" + substrtrail;
else
temp = substrhead + "sqt(" + substrtrail + ")";
}
if (content.equals("x²")) {
if (substrtrail.startsWith("(") && substrtrail.endsWith(")")
&& indexOfFirstMirrorBracket(substrtrail, '(') == substrtrail.length() - 1)
temp = substrhead + "sqr" + substrtrail;
else
temp = substrhead + "sqr(" + substrtrail + ")";
}
if (content.equals("1/x")) {
if (substrtrail.startsWith("(") && substrtrail.endsWith(")")
&& indexOfFirstMirrorBracket(substrtrail, '(') == substrtrail.length() - 1)
temp = substrhead + "rec" + substrtrail;
else
temp = substrhead + "rec(" + substrtrail + ")";
}
if (content.equals("sin")) {
if (substrtrail.startsWith("(") && substrtrail.endsWith(")")
&& indexOfFirstMirrorBracket(substrtrail, '(') == substrtrail.length() - 1)
temp = substrhead + "sin" + substrtrail;
else
temp = substrhead + "sin(" + substrtrail + ")";
}
if (content.equals("cos")) {
if (substrtrail.startsWith("(") && substrtrail.endsWith(")")
&& indexOfFirstMirrorBracket(substrtrail, '(') == substrtrail.length() - 1)
temp = substrhead + "cos" + substrtrail;
else
temp = substrhead + "cos(" + substrtrail + ")";
}
if (content.equals("tan")) {
if (substrtrail.startsWith("(") && substrtrail.endsWith(")")
&& indexOfFirstMirrorBracket(substrtrail, '(') == substrtrail.length() - 1)
temp = substrhead + "tan" + substrtrail;
else
temp = substrhead + "tan(" + substrtrail + ")";
}
if (content.equals("log")) {
if (substrtrail.startsWith("(") && substrtrail.endsWith(")")
&& indexOfFirstMirrorBracket(substrtrail, '(') == substrtrail.length() - 1)
temp = substrhead + "log" + substrtrail;
else
temp = substrhead + "log(" + substrtrail + ")";
}
if (temp.startsWith("(") && temp.endsWith(")") && indexOfFirstMirrorBracket(temp, '(') == temp.length() - 1)
temp = temp.substring(1, temp.length() - 1);
return temp;
}
/**
* 数字结尾后面跟平方、求倒、开方
*
* @param result
* @param content
* @return
*/
public static String parseDigitEndWithFuncthion(String result, String content) {
String temp = "";
String contentTemp = "";
if (content.equals("1/x"))
contentTemp = "rec";
if (content.equals("n!"))
contentTemp = "!";
if (content.equals("x²"))
contentTemp = "sqr";
if (content.equals("√"))
contentTemp = "sqt";
if(content.equals("sin"))
contentTemp= "sin";
if(content.equals("cos"))
contentTemp= "cos";
if(content.equals("tan"))
contentTemp= "tan";
if(content.equals("log"))
contentTemp= "log";
int startIndex = indexOfNumberStart(result);// 数字的开头
String substrhead = result.substring(0, startIndex);
String substrtrail = result.substring(startIndex);
if (result.startsWith("-") && startIndex == 1) {
if (contentTemp == "!")
temp = "-" + result.substring(startIndex) + "!";
else
temp = contentTemp + "(" + result + ")";
} else {
if (contentTemp == "!") {
if (substrtrail.endsWith("π") || substrtrail.matches(".*\\.\\d*[1-9]+$"))
temp = result;
else
temp = substrhead + substrtrail + contentTemp;
} else
temp = substrhead + contentTemp + "(" + substrtrail + ")";
}
return temp;
}
}
