Create Zip File With CRC32 Checksum In Java

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import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class JavaCreateZipFileWithCRC32 {
	public static void main(String args[]) {
		
		String zipFile = "C:/File/Demozip.zip";
		String sourceFile = "C:/File/file1.doc";

		byte[] buffer = new byte[1024];

		try {

			FileOutputStream fout = new FileOutputStream(zipFile);

			CheckedOutputStream checksum = new CheckedOutputStream(fout, new CRC32());

			ZipOutputStream zout = new ZipOutputStream(checksum);

			FileInputStream fin = new FileInputStream(sourceFile);

			zout.putNextEntry(new ZipEntry(sourceFile));

			int length;

			while ((length = fin.read(buffer)) > 0) {
				zout.write(buffer, 0, length);
			}

			zout.closeEntry();

			fin.close();

			zout.close();

			System.out.println("Zip file has been created!");

			System.out.println("CRC32 Checksum is : " + checksum.getChecksum().getValue());
		} catch (IOException ioe) {
			System.out.println("IOException : " + ioe);
		}

	}
}
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