returns a hash of the given files contents . reads the file fully into memory before hashing so only use with small files . concode_field_sep Sha256Hash ZERO_HASH concode_elem_sep byte[] bytes concode_field_sep Sha256Hash createDouble concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep Sha256Hash create concode_elem_sep BigInteger toBigInteger concode_elem_sep String toString concode_elem_sep Sha256Hash duplicate concode_elem_sep int compareTo concode_elem_sep byte[] getBytes