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);  
}