Why i have this strange output in this method?

I was trying to solve this leet code question 557. Reverse Words in a String III in this question, I had to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.

eg :

Input: s = "Let's take LeetCode contest"

Output: "s'teL ekat edoCteeL tsetnoc"

so I wrote this class in my IDEA and I got this strange output: [C@3fee733d

this is my try:

public class ReveseWordsInString {


    public static void main(String[] args) {
        String s = "lets get a leet code challanges ";

        System.out.println(s);
        System.out.println(reverseWords(s));
    }


    //after knowing the first and the last index of the word 
    // we call the reverseGivenWord() to reverse that word
    public static String reverseWords(String s) {

        if (s.length() == 1)
            return s;

        char[] words = s.toCharArray();

        int firstIndexOfTheWord = 0;
        int lastIndexOfTheWord;

        for (int i = 1; i < s.length(); i++) {

            if (words[i] == ' ') {

                lastIndexOfTheWord = i - 1;

                reverseGivenWord(words, firstIndexOfTheWord, lastIndexOfTheWord);

                firstIndexOfTheWord = i + 1;
            }
        }


        return words.toString();
    }


    //this method reverse a given word
    public static void reverseGivenWord(char[] word, int left, int right) {

        char temp;

        while (left <= right) {

            if (word[left] != word[right]) {
                temp = word[right];
                word[right] = word[left];
                word[left] = temp;
            }

            right--;
            left++;
        }
    }
}
`