[leetcode] Reverse Words in a String

/**
 * http://blog.csdn.net/perfect8886/article/details/20833685
 * 
 * */
public class Solution {
    public String reverseWords(String s) {
        String[] a = s.split(" ");
        StringBuilder sb = new StringBuilder();
        for (int i = a.length - 1; i >= 0; i--) {
            if (!a[i].equals("")) {
                sb.append(a[i]);
                sb.append(" ");
            }
        }
        if (sb.length() > 1)
            sb.deleteCharAt(sb.length() - 1);

        return sb.toString();
    }

    public static void main(String[] args) {
        System.out.println(new Solution().reverseWords("the sky is blue"));
    }

}