Rotates a String at the given index

RotateString.java

import java.io.*;
import java.util.*;

/*
 * Given an input String and an integer index, rotate the string around the given index
 */

public class RotateString {
    public static void main(String[] args) {
      
      String input = "123456";      
      System.out.println("Original: " + input);
      
      String result = rotate(input, 3);
      
      System.out.println("Result: " + result);
  }
    
    public static String rotate(String input, int pivot) {
        char[] inputChars = input.toCharArray();
        reverse(inputChars, 0, pivot-1);
        // System.out.println(inputChars);
        reverse(inputChars, pivot, input.length() - 1);
        // System.out.println(inputChars);
        reverse(inputChars, 0, input.length() - 1);
        
        return new String(inputChars);
    }
    
    private static void reverse(char[] inputChars, int start, int end) {
        int mid = (start + end)/2;
        
        for (int i = start; i <= mid; i++) {
            swap(inputChars, i, (start+end)-i);
        }
    }
    
    private static void swap(char[] inputChar, int i, int j) {
        char temp = inputChar[i];
        inputChar[i] = inputChar[j];
        inputChar[j] = temp;
    }
}