Replace Words

Problem

Given a string. Replace the words whose length>=4 and is even, with a space between the two equal halves of the word. Consideronly alphabets for finding the evenness of the word
I/P "A person can't walk in this street"
O/P "A per son ca n't wa lk in th is str eet"

 

Solution

 1 public static String replaceWords(String s) {
 2     StringBuilder sb = new StringBuilder();
 3     if (s == null)
 4         return sb.toString();
 5 
 6     char[] arr = s.toCharArray();
 7     int n = 0;
 8     int length = 0;
 9     while (n < arr.length) {
10         if (arr[n] == ' ') {
11             if (length >= 4 && (length-1)%2 == 0) {
12                 sb.append(s.substring(n - length, n - length / 2));
13                 sb.append(' ');
14                 sb.append(s.substring(n - length / 2, n));
15                 length = 0;
16             }
17             else {
18                 sb.append(s.substring(n - length, n));
19                 length = 0;
20             }
21         }
22         length++;
23         n++;
24     }
25     return sb.toString();
26 }

 

posted on 2014-11-21 09:23  SuperBo  阅读(214)  评论(0)  编辑  收藏  举报