Implementation of cyclic redundancy check (CRC32) in Java

preface

This article mainly introduces the contents related to the implementation of cyclic redundancy check (CRC32) in Java, which can be shared for your reference and learning. I won't say much below. Let's take a look at the detailed introduction together.

Introduction to CRC32

In the field of data storage and data communication, CRC verification utility library has to adopt error detection means in order to ensure the correctness of data. Among many error detection methods, CRC is the most famous one. The full name of CRC is cyclic redundancy check.

CRC32 has strong error detection ability and low overhead. It is easy to realize with encoder and detection circuit. In terms of its error detection ability, the probability of errors it cannot find is only less than 0.0047%. In terms of performance and overhead, it is far better than parity check and arithmetic sum check. Therefore, in the field of data storage and data communication, CRC is everywhere: the famous communication protocol X.25 FCS (frame error detection sequence) adopts CRC-CCITT, ARJ, LHA and other compression tool software adopts CRC32, the disk drive adopts CRC16, and the general image storage formats GIF and TIFF also use CRC as error detection means.

CRC implementation

Test code:

Test results:

seven hundred and twenty-four million five hundred and eighty-five thousand two hundred and eleven

summary

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