In this example we shall show you how to calculate the CRC32 Checksum of a byte array. To calculate the CRC32 checksum of a byte array one should perform the following steps:
- Get the byte array of a String, using
getBytes()API method of String. - Create a new Checksum object, that represents a data checksum.
- Update the current checksum with the specified array of bytes, using
update(byte[] b, int off, int len)API method of Checksum. - Get the current checksum long value, using
getValue()API method of Checksum,
as described in the code snippet below.
package com.javacodegeeks.snippets.core;
import java.util.zip.CRC32;
import java.util.zip.Checksum;
public class CalculateCRC32ChecksumForByteArray {
public static void main(String[] args) {
String input = "Java Code Geeks - Java Examples";
// get bytes from string
byte bytes[] = input.getBytes();
Checksum checksum = new CRC32();
// update the current checksum with the specified array of bytes
checksum.update(bytes, 0, bytes.length);
// get the current checksum value
long checksumValue = checksum.getValue();
System.out.println("CRC32 checksum for input string is: " + checksumValue);
}
}
Output:
CRC32 checksum for input string is: 3564377865
This was an example of how to calculate the CRC32 checksum of a byte array in Java.
how to Calculate CRC8 checksum for byte array! Thank you in advance.