Thread: Help me to understand how does this recursive function (max) work int i = max(Arrays.copyOf(a,n-1));

import java.util.*;
 
public class MaxElement {
 
   public static void main(String[] args) {
// creating array lenght of 5 integers, and receving input from keyboard
      int[] a = new int[5];
      Scanner tastatura = new Scanner(System.in);
 
      System.out.println("Type elements of array ... ");
      for (int i = 0; i < a.length; i++) {
         System.out.print("Type " + (i+1) + ". element: ");
         a[i] = tastatura.nextInt();
      }
//printing max element of array
         System.out.print("Max element of array is: ");
         System.out.println(a[max(a)]);
      }
 
   public static int max(int[] a) {
 
       int n = a.length;
       if (n == 1)
         return 0;
       else {
         int i = max(Arrays.copyOf(a,n-1));//this is a problem... i dont know what is returned to int i?
         if (a[i] < a[n-1])
             return n-1;
         else
             return i;
       }
   }
}