LeetCode30|翻转单词顺序

输入: "the sky is blue"
输出: "blue is sky the"

 
public class ReverseWordsTest {
    public static void main(String[] args) {
        String str = "the sky is blue";
        String reverseWords = reverseWords(str);
        System.out.println("reverseWords = " + reverseWords);
    }

    public static String reverseWords(String s) {
        if (s == null || s.length() == 0) {
            return s;
        }
        String[] results = s.split(" ");
        int length = results.length;
        StringBuilder stringBuilder = new StringBuilder(length);
        for (int i = length - 1; i >= 0; i--) {
            if (!results[i].equals("")) {
                stringBuilder.append(results[i]);
                stringBuilder.append(" ");
            }
        }
        return stringBuilder.toString().trim();
    }
}