Reverse a string recursively

ReverseString.java

public class ReverseString {
    public static void main(String args[]){
        String s = "reverse test 123456789";
        char[] array = s.toCharArray();
        reverse(array, 0, array.length - 1);
        System.out.println(array);
    }
    
    public static void reverse(char[] array, int start, int end) {
        if(start < end){
            char tmp = array[start];
            array[start] = array[end];
            array[end] = tmp;
            reverse(array, start + 1, end - 1);
        }
    }
}