[LintCode] Reverse Words in a String（翻转字符串中的单词）

给定一个字符串，逐个翻转字符串中的每个单词。

• 单词的构成：无空格字母构成一个单词
• 输入字符串是否包括前导或者尾随空格？可以包括，但是反转后的字符不能包括
• 如何处理两个单词间的多个空格？在反转字符串中间空格减少到只含一个

给出s = "the sky is blue"，返回"blue is sky the"

/**
 * 53 https://www.lintcode.com/problem/reverse-words-in-a-string/description
 */
@Test
public void testReverseWords() {

  String s = "  Life  doesn't  always    give     us  the       joys we want.";

  String retStr = "";
  String[] inStr = s.split(" ");

  for (int i = inStr.length - 1; i >= 0; i--) {
    String cStr = inStr[i].trim();
    if (!cStr.isEmpty()) {
      retStr = retStr + " " + cStr;
    }
  }
  retStr = retStr.trim();
  System.out.println(retStr);
  // return retStr;
}