Interview Questions

Java - Checksum manipulation

/**
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
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 */

package com.techdive.java.examples;

import java.io.ByteArrayInputStream;
import java.util.zip.CRC32;
import java.util.zip.CheckedInputStream;

/**
 * This class provides the implementation to get the Checksum value for the text.
 */

public class Checksum
{
        public static void main(String[] args) throws Exception
        {
                String msg = "techdive.ina";
                CheckedInputStream cis = new CheckedInputStream(new ByteArrayInputStream(msg.getBytes()), new CRC32());
                byte[] tempBuf = new byte[1024];
                cis.read(tempBuf);
                long checkSumValue = cis.getChecksum().getValue();
                System.out.println("Checksum = " + checkSumValue);
        }
}