Method reverseString

java/0043-multiply-strings.java:43–47

(String str)

    }

    private String reverseString(String str) {
        StringBuilder reversedStr = new StringBuilder(str);
        reversedStr.reverse();
        return reversedStr.toString();
    }

    private void reverseArrayInPlace(int[] arr) {
        for (int i = 0; i < arr.length / 2; i++) {