A simple hash using CRC32 and Adler32 in Java

MySimpleHash.java

package com.example;

import java.util.zip.Adler32;
import java.util.zip.CRC32;

public class MySimpleHash {

	/**
	 * Calculate a 64 bits hash by combining CRC32 with Adler32.
	 * 
	 * @param bytes a byte array
	 * @return a hash number
	 */
	public static long getHash(byte[] bytes) {

		CRC32 crc32 = new CRC32();
		Adler32 adl32 = new Adler32();

		crc32.update(bytes);
		adl32.update(bytes);

		long crc = crc32.getValue();
		long adl = adl32.getValue();

		return (crc << 32) | adl;
	}

	public static void main(String[] args) {
		String string = "This is a test string";
		long hash = getHash(string.getBytes());
		System.out.println(hash);
		// output: 7732385261082445741
	}
}