【求助】求高手将程序改为有输出计算过程的程序，并优化程序，谢谢！
将下面程序改为有计算过程的程序，比如输入：1+（2*3），输出：=1+6=7.
程序有很多毛病与不足，还请高手给优化，谢谢！
import java.util.Scanner;
public class Buhui {
public int Str = 0;
public int br = 0;
// 追加默认构造器
private Buhui() {
}
public static void main(String[] args) {
Buhui sObject = new Buhui();
Scanner input = new Scanner(System.in);
do {
System.out.println("请输入四则运算式:");
String numberString = input.next().trim();
if (sObject.PanduanShuRu(numberString) == false) {
System.out.println("您输入有误，请正确输入!");
} else {
System.out.println(sObject.PanduanKuohao(numberString));
}
} while (true);
}
// 判断是否正确输入运算方式
private boolean PanduanShuRu(String messString) {
boolean ispass = false;
boolean operationIspass = true;
int ai = 0;
char[] IsString = messString.toCharArray();
int num1 = 0;
int num2 = 0;
for (int i = 0; i < IsString.length; i++) {
if ('(' == IsString[i])
num1++;
if (')' == IsString[i])
num2++;
if ('/' == IsString[i] && IsString[i + 1] == '0')
operationIspass = false;
if (IsString[i] == '+' || IsString[i] == '-' || IsString[i] == '*'
|| IsString[i] == '/')
ai++;
if (i == IsString.length - 1)
if (ai == 0)
num2++;
}
if (operationIspass)
if (num1 == num2)
ispass = true;
return ispass;
}
private String PanduanKuohao(String str) {
String result = str;
char[] numberString = str.toCharArray();
int IndexStart = 0;
int EndStart = 0;
for (int i = 0; i < numberString.length; i++) {
if ('(' == numberString[i]) {
IndexStart = i;
}
if (')' == numberString[i]) {
EndStart = i;
result = result.substring(IndexStart + 1, EndStart);
result = str.substring(0, IndexStart)
+ NoKuohao(result, '*', '/')
+ str.substring(EndStart + 1, str.length());
return PanduanKuohao(result);
}
if (i == numberString.length - 1)
if (EndStart == 0)
break;
}
result = NoKuohao(str, '*', '/');
return result;
}
// 不带括号的四则运算
private String NoKuohao(String operationNumber, char a, char b) {
String mess = operationNumber;
char[] stringOperation = mess.toCharArray();
for (int i = 0; i < stringOperation.length; i++) {
if (stringOperation[i] == a || stringOperation[i] == b) {
if (i != 0) {
double num1 = JieQu1(mess.substring(0, i));
int frontPosition = Str;
double num2 = JieQu2(mess.substring(i + 1,
stringOperation.length));
int backPosition = Str;
String IndexMess = mess.substring(0, i - frontPosition + 1);
String IndexResult = "";
if (IndexMess.indexOf('+') == -1
&& IndexMess.indexOf('*') == -1
&& IndexMess.indexOf('/') == -1
&& IndexMess.lastIndexOf('-') == -1)
IndexMess = "";
if (IndexMess != "")
IndexResult = IndexMess.lastIndexOf('-') == IndexMess
.length() - 1 ? IndexMess.substring(0, i
- frontPosition) : IndexMess;
mess = IndexResult
+ JiSuanString("" + stringOperation[i], num1, num2)
+ mess.substring(i + backPosition + 1);
if (mess.lastIndexOf('-') == 0 && mess.indexOf('+') == -1
&& mess.indexOf('*') == -1
&& mess.indexOf('/') == -1) {
break;
}
return NoKuohao(mess, a, b);// 1+7-5+89/3+4-6*8/2+4-6
} else
continue;
}
if (i == stringOperation.length - 1) {
if (mess.indexOf('+') != -1 || mess.indexOf('-') != -1)
return NoKuohao(mess, '+', '-');
break;
}
}
return mess;
}
// 截取第二个数
private double JieQu2(String str) {
double a = 0;
int InrerceIndex = 0;
char[] stringOperation = str.toCharArray();
boolean ispas = false;
for (int i = 0; i < stringOperation.length; i++) {
switch (stringOperation[i]) {
case '*':
case '/':
case '+':
case '-':
InrerceIndex = i;
if (i != 0)
ispas = true;
break;
default:
break;
}
if (ispas)
break;
}
if (InrerceIndex == 0) {
a = Double.parseDouble(str);
Str = str.length();
if (ispas)
Str++;
} else {
a = Double.parseDouble(str.substring(0, InrerceIndex));
Str = str.substring(0, InrerceIndex).length();
}
return a;
}
// 截取第一个数
private double JieQu1(String str) {
double a = 0;
int InrerceIndex = 0;
boolean temp = false;
char[] stringOperation = str.toCharArray();
for (int i = stringOperation.length - 1; i >= 0; i--) {
switch (stringOperation[i]) {
case '*':
case '/':
case '+':
case '-':
InrerceIndex = i;
temp = true;
break;
default:
break;
}
if (temp)
break;
}
if (InrerceIndex == 0) {
a = Double.parseDouble(str);
Str = str.length();
} else {
a = Double.parseDouble(str.substring(InrerceIndex, str.length()));
Str = str.substring(InrerceIndex, str.length()).length();
}
return a;
}
// 计算结果
private double JiSuanString(String operation, double num1, double num2) {
double sum = 0;
if (operation.equals("*"))
sum = num1 * num2;
if (operation.equals("-"))
sum = num1 - num2;
if (operation.equals("/"))
sum = num1 / num2;
if (operation.equals("+"))
sum = num1 + num2;
return sum;
}
}
[解决办法]
还有就是你想怎么优化啊？
