H, i am a learner- please help with this array problem. I have to find the next number in this array sequence. Sample Input and Output:

 5--n total numbers to be entered. 2 3 5 4 1 

Next customer id is 6.

import java.util.Scanner;  public class help1 {      public static void main(String[] args){          Scanner scan = new Scanner(System.in);         int num = 0;         int missingTrack = 0;         System.out.println("Enter number of sequence:");         int n = scan.nextInt();         int id[] = new int[n];          for(int i=0; i<n; i++) {             id[i] = scan.nextInt();         }          for(int i=0; i<n; i++) {              if(i==n-1)             {                 break;             }             Arrays.sort(id);             for (i=0;i== n-1;i++)             {                 int next=id[i]+1;             }            }                     System.out.println("Next customer id is"+next);           } }