557. Reverse Words in a String III
Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.
Example 1:
Example 1:
Input: "Let's take LeetCode contest" Output: "s'teL ekat edoCteeL tsetnoc"
Note: In the string, each word is separated by single space and there will not be any extra space in the string.
思路：给定一个字符串，你需要颠倒句子中每个单词中的字符顺序，同时仍然保留空格和初始单词顺序。可以运用StringBuilder的reverse方法。
代码如下：
public class ReverseWordsInAStringIII {
public static String reverseWords(String s) {
String[] strings = s.split(" ");
StringBuilder res = new StringBuilder();
for (int i = 0; i < strings.length; i++) {
StringBuilder temp = new StringBuilder(strings[i]);
res.append(temp.reverse() + " ");
}
return res.toString().trim();
}
}
p: String的trim()方法，去除首尾空格
