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class Solution {
    public String reverseWords(String s) {
        String[] words = s.split(" ");
        StringBuilder ans = new StringBuilder();
        for (String word : words) {
            StringBuilder currWord = new StringBuilder(word);
            ans.append(currWord.reverse()).append(" ");
        }
        ans.setLength(ans.length() - 1);
        return ans.toString();
    }
}

这个没什么可说的.