Trying to determin the given array is a permutation public static boolean isPermutation(int[] arr)

Determines whether the given array is a permutation. In this context, a permutation is an array that contains each of the values 0 through n - 1 exactly once, where n is the length of the array. For an empty array, the method returns true.

Parameters:

arr - array to be checked

Returns:

true if the given array is a permutation, false otherwise