[Java] 문자열에서 단어마다 문자 순서 뒤집기

public class StringMagic {

    public String reverseWordsInSentence(String sentence) {
        if(sentence == null){
            return "INVALID";
        }else if(sentence == ""){
            return "";
        }
        String[] words = sentence.split(" ");
        StringBuilder reversedSentence = new StringBuilder();
        
        for(String word:words){
            StringBuilder reversedStr = new StringBuilder(word).reverse();
            reversedSentence.append(reversedStr).append(" ");
        }
        return reversedSentence.toString().trim();
    }
}