DO WHILE BUBBLE SORT

package com.company;

import java.lang.reflect.Array;
import java.util.Arrays;
import java.util.Scanner;

public class Algorithm4 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.print("Please input the number of elements :");
        int n = Integer.parseInt(scan.nextLine());
        char[] arr = new char[n]; // Define array for elements

        for (int i = 0; i < n; i++) // Input values to array
        {
            System.out.printf("Please insert the [%d] element of array :", i);
            arr[i] = scan.next().charAt(0);
        }
        System.out.println("BEFORE SORTING :");
        System.out.println(Arrays.toString(arr));

        boolean swap;
        do {
            swap = false;
            for (int i = 0; i < arr.length - 1; i++) {
                if (arr[i] > arr[i + 1]) {
                    int free = arr[i];
                    arr[i] = arr[i + 1];
                    arr[i + 1] = (char) free;
                    swap = true;
                }
            }
        } while (swap) ;

        System.out.println("AFTER SORTING :");
        System.out.println(Arrays.toString(arr));


    }
}