## 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;//idprivate 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Mjtf[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 {@Overridepublic 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resultresult= 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");elsejtf[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!");elsecalculate();}// 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!");} elsecalculate();}//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!");} elsecalculate();}// 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=0jtf[2].setText("0 can not be the dividend!");result=result.substring(0,result.length() - 1);} elsecalculate();} elsecalculate();}}}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);elsefinalResult = 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);elseresult = result.concat("");}// 以数字结尾else if (Pattern.matches(".*\\d$|.*π$", result)) {// 不可输入00if (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2.1.2else if (Pattern.matches(".*\\.\\d+$", result)) {// 结果以.数字结尾result = result.concat(content.matches("\\d*|\\+|\\-|\\*|\\%|÷|\\)|=") ? content : "");}// 数字或小数点else if (content.matches("\\d|\\."))result = result.concat(content);elseresult = result.concat(content.matches("\\+|\\-|\\*|\\%|÷|\\)|=") ? " " + content : "");}// 以小数点结尾else if (Pattern.matches(".*\\.$", 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(".*\\-$")) {// 以减号结尾if (result.length() == 1)result = result + (content.matches("\\(|\\d|π") ? content : "");// 负号else if (result.length() > 1) {// 减号或左括号负号boolean b = result.charAt(result.length() - 2) == '(';if (b)result = result + (content.matches("\\(|\\d|π") ? content : "");// 左括号负号elseresult = result + (content.matches("\\(|\\d|π") ? " " + content : "");// 减号}} elseresult = result + (content.matches("\\(|\\d|π") ? " " + content : "");}// 以！结尾else if (Pattern.matches(".*!$", result)) {result = result + (content.matches("\\+|\\-|\\%|\\*|/|=|\\)") ? content : "");}return result;}/*** 计算处理** @param content* @return*/public static double parse(String content) {// 处理πif (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sinindex=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cosindex=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tanindex=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logindex=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;elseresultIndex = 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;} elseresultIndex = 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);} elsereturn "";}/*** 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;elsetemp = substrhead + "sqt(" + substrtrail + ")";}if (content.equals("x²")) {if (substrtrail.startsWith("(") && substrtrail.endsWith(")")&& indexOfFirstMirrorBracket(substrtrail, '(') == substrtrail.length() - 1)temp = substrhead + "sqr" + substrtrail;elsetemp = substrhead + "sqr(" + substrtrail + ")";}if (content.equals("1/x")) {if (substrtrail.startsWith("(") && substrtrail.endsWith(")")&& indexOfFirstMirrorBracket(substrtrail, '(') == substrtrail.length() - 1)temp = substrhead + "rec" + substrtrail;elsetemp = substrhead + "rec(" + substrtrail + ")";}if (content.equals("sin")) {if (substrtrail.startsWith("(") && substrtrail.endsWith(")")&& indexOfFirstMirrorBracket(substrtrail, '(') == substrtrail.length() - 1)temp = substrhead + "sin" + substrtrail;elsetemp = substrhead + "sin(" + substrtrail + ")";}if (content.equals("cos")) {if (substrtrail.startsWith("(") && substrtrail.endsWith(")")&& indexOfFirstMirrorBracket(substrtrail, '(') == substrtrail.length() - 1)temp = substrhead + "cos" + substrtrail;elsetemp = substrhead + "cos(" + substrtrail + ")";}if (content.equals("tan")) {if (substrtrail.startsWith("(") && substrtrail.endsWith(")")&& indexOfFirstMirrorBracket(substrtrail, '(') == substrtrail.length() - 1)temp = substrhead + "tan" + substrtrail;elsetemp = substrhead + "tan(" + substrtrail + ")";}if (content.equals("log")) {if (substrtrail.startsWith("(") && substrtrail.endsWith(")")&& indexOfFirstMirrorBracket(substrtrail, '(') == substrtrail.length() - 1)temp = substrhead + "log" + substrtrail;elsetemp = 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) + "!";elsetemp = contentTemp + "(" + result + ")";} else {if (contentTemp == "!") {if (substrtrail.endsWith("π") || substrtrail.matches(".*\\.\\d*[1-9]+$"))temp = result;elsetemp = substrhead + substrtrail + contentTemp;} elsetemp = substrhead + contentTemp + "(" + substrtrail + ")";}return temp;}
}