substring数组越界_请检查是否存在数组越界非法访问等情况

请检查是否存在数组越界非法访问等情况

case通过率为90.00%

请各位大牛帮忙看下，下面代码为什么会提示 “请检查是否存在数组越界非法访问等情况 case通过率为90.00%”。

代码功能为算式计算，输入格式为：

(OP P1 P2)

其中，P1和P2为整数或者算式，OP表示计算操作，支持add(加)、sub(减)、mul(乘)、div(除)操作。例如：

(add 3 -7)=-4，(add 3 (add 3 -7))=-1；

(sub 3 -7)=10，(sub (sub 3 -7) -7)=17；

(mul 3 -7)=-21，(mul 3 (mul 3 -7))=63；

(div 7 3)=2，(div 7 (div 7 3))=3。

代码如下

import java.util.Scanner;

public class Main {

public static void main(String[] args) {

Scanner scanner =null;

String input =null;

int result =0;

scanner =new Scanner(System.in);

while(scanner.hasNextLine()) {

input = scanner.nextLine();

result = operate(input);

System.out.println(result);

}

scanner.close();

}

private static int operate(String order) {

int result =0;

int paraFirst =0, paraSecond =0;

int splitIndexFirst = -1, splitIndexSecond = -1;

String[] orderArray =null;

orderArray =newString[3];

if(order !=null&& order.startsWith("(") && order.endsWith(")")){

order = order.substring(1, order.length()-1);

splitIndexFirst = order.indexOf(" ");

orderArray[0] = order.substring(0, splitIndexFirst);

order = order.substring(splitIndexFirst+1);

splitIndexSecond = lengthEle(order);

orderArray[1] = order.substring(0, splitIndexSecond);

orderArray[2] = order.substring(splitIndexSecond+1);

if(orderArray[1] !=null&& orderArray[1].startsWith("(")){

paraFirst = operate(orderArray[1]);

}else{

paraFirst = Integer.valueOf(orderArray[1]);

}

if(orderArray[2] !=null&& orderArray[2].startsWith("(")){

paraSecond = operate(orderArray[2]);

}else{

paraSecond = Integer.valueOf(orderArray[2]);

}

if("add".equalsIgnoreCase(orderArray[0])){

result = paraFirst + paraSecond;

}else if("sub".equalsIgnoreCase(orderArray[0])){

result = paraFirst - paraSecond;

}else if("mul".equalsIgnoreCase(orderArray[0])){

result = paraFirst * paraSecond;

}else if("div".equalsIgnoreCase(orderArray[0])){

result = paraFirst / paraSecond;

}

}

return result;

}

private static int lengthEle(String data) {

int result = -1;

int dataLen = -1, deep =0;

boolean flag =true;

char[] dataArray =null;

if(data !=null){

dataArray = data.toCharArray();

dataLen = dataArray.length;

if(data.startsWith("(")){

for(int index =0; flag && index < dataLen; index++){

if("(".equalsIgnoreCase(String.valueOf(dataArray[index]))){

deep++;

}else if(")".equalsIgnoreCase(String.valueOf(dataArray[index]))){

deep--;

}

if(deep ==0){

result = index+1;

flag =false;

}

}

}else{

for(int index =0; flag && index < dataLen; index++){

if(" ".equalsIgnoreCase(String.valueOf(dataArray[index]))){

result = index;

flag =false;

}

}

}

}

return result;

}

}