reverse a string in java

Reverse.java

class Reverse {
    public static void main(String[] args) {
        reverse("abcde");
    }

    public static void reverse(String str){
        char[] str_arr = str.toCharArray();

        int start = 0,
            end = str_arr.length-1;

        while (start < end){
            char temp = str_arr[start];
            str_arr[start] = str_arr[end];
            str_arr[end] = temp;

            start++;
            end--;
        }

        System.out.println(str_arr);
    }
}