Help with a crc32 implementation

import java.util.zip.CRC32;
import java.io.*;
import java.util.*;
import openwfe.org.*;
public class crc32 {

public static final String initvalue = "37a52d19"; // hex string

public static void main (String args[]) {

String inputstring = "";
String checkstring = "";
String resultstring = "";

byte[] crcinput ;
byte[] initvalarr;

long result = 0;

InputHelper inp = new InputHelper();
System.out.println(" ****** CRC program ****** ");
System.out.println();
inputstring = inp.getUserInput(" Please enter a string to be checked: ");
checkstring = inputstring.substring(0,11);

crcinput = checkstring.getBytes();
initvalarr = initvalue.getBytes();
leng = checkstring.length(); 


// Compute CRC checksum.

CRC32 crc32 = new CRC32();
crc32.reset();

// Update initial value first.

crc32.update(initvalarr,0,initvalarr.length); 
crc32.update(crcinput,0,crcinput.length);

result = crc32.getValue();
resultstring = Long.toHexString(result);

System.out.println(" Validation result: " + resultstring); 
}
}