Array.binarySearch() oOnly usable on sorted array! OOtherwise,result unpredictable o If there are multiple elements equal to the specified object,there is no guarantee which one will be found. ●Return: OLocation if find the key (positive number) O(-(insertion point)-1)if not find key (negative)Array.binarySearch() lOnly usable on sorted array! ¡Otherwise, result unpredictable lIf there are multiple elements equal to the specified object, there is no guarantee which one will be found. lReturn: ¡Location if find the key (positive number) ¡ (-(insertion point) - 1) if not find key (negative)