This class
implements the Checksum interface and computes a
checksum on a stream of data using the Adler-32 algorithm. This
algorithm is significantly faster than the CRC-32 algorithm and is
almost as reliable. The CheckedInputStream and
CheckedOutputStream classes provide a higher-level
interface to computing checksums on streams of data.
Figure 16-134. java.util.zip.Adler32
 public class Adler32 implements Checksum {
// Public Constructors
public Adler32 ( );
// Public Instance Methods
public void update (byte[ ] b );
// Methods Implementing Checksum
public long getValue ( ); default:1
public void reset ( );
public void update (int b );
public void update (byte[ ] b , int off , int len );
}
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