Array:
Arrays.copyfOf(<original primitive array>, int newLengtg) 如果newlength大于original, 则会padd成0或者null character,取决于original array 的type.
Array:
Arrays.copyfOf(<original primitive array>, int newLengtg) 如果newlength大于original, 则会padd成0或者null character,取决于original array 的type.