错误是从Java中给定字符串中查找第二大数

我试图从给定的字符串中找到第二大的数字,但它并没有给出我想要的确切结果。

import java.util.Scanner;
public class SecondLargest {
    public static void secondlarge(char[] arr,int arr_size) {
        int i,first,second;
        first = second = Integer.MIN_VALUE;
        for(i = 0 ; i < arr_size ; i++) {
            if (arr[i] > first) {
                second =first;
                first= arr[i];
            }
            else if (arr[i] > second && arr[i] != first)
                second = arr[i];
        }
        if (second == Integer.MIN_VALUE)    
            System.out.println("There is no second largest element\n"); 
        else
            System.out.println("The second largest element is "+second); 
    }
    public static void main(String[] args)  { 

        Scanner scan = new Scanner(System.in);
        System.out.print("Enter the String ");
        String userString = scan.nextLine();
        char[] stringToCharArray = userString.toCharArray();

        int n = stringToCharArray.length;
        secondlarge(stringToCharArray, n);
    }           
}

输出如下所示

输入字符串52236第二大元素是53

最大的数字应该只有5位,在输出中显示53位。