Not really. You can use JNI but it's awkward, discouraged, and every JNI call has overhead -- so much overhead that in the Hadoop project, for example, it was

Not really. You can use JNI but it's awkward, discouraged, and every JNI call has overhead -- so much overhead that in the Hadoop project, for example, it was faster to implement their own CRC32 than to use the built in one calling zlib.