【IT笔试面试题整理】字符串转数组+数组转字符串

【试题描述】定义一个函数，字符串转数组数组转字符串

【参考代码】

 1     public static int strToInt(String str)

 2     {

 3         int i = 0, num = 0;

 4         char[] strTemp = str.toCharArray();

 5         boolean isNeg = false;

 6         int len = str.length();

 7 

 8         if (strTemp[0] == '-')

 9         {

10             isNeg = true;

11             i = 1;

12         }

13         while (i < len)

14         {

15             num *= 10;

16             num += (strTemp[i++] - '0');

17         }

18         if (isNeg)

19             num *= -1;

20         return num;

21     }

 1     public static String intTOStr(int num)

 2     {

 3         char[] tempChar = new char[11];

 4         int i = 0;

 5         boolean isNeg = false;

 6         if (num < 0)

 7         {

 8             num *= -1;

 9             isNeg = true;

10         }

11         do{

12             tempChar[i++] = (char) (num % 10 + '0');

13             num /=10;

14         }while (num != 0);

15         

16         if(isNeg)

17             tempChar[i] = '-';

18         System.out.println(tempChar);

19         StringBuilder b = new StringBuilder();

20         while(i>=0)

21         {

22             b.append(tempChar[i--]);

23         }

24     

25         return b.toString();

26     }