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## java.util.zip
Interface Checksum

All Known Implementing Classes:
  Adler32, CRC32

public interface Checksum

An interface representing a data checksum.

Method Summary
`long` | `getValue()` Returns the current checksum value.
`void` | `reset()` Resets the checksum to its initial value.
`void` | `update(byte[] b, int off, int len)` Updates the current checksum with the specified array of bytes.
`void` | `update(int b)` Updates the current checksum with the specified byte.

Method Detail

### update

    public void update(int b)

  Updates the current checksum with the specified byte.

  Parameters:
    `b` - the byte to update the checksum with

### update

    public void update(byte[] b,
                       int off,
                       int len)

  Updates the current checksum with the specified array of bytes.

  Parameters:
    `b` - the byte array to update the checksum with
    `off` - the start offset of the data
    `len` - the number of bytes to use for the update

### getValue

    public long getValue()

  Returns the current checksum value.

  Returns:
    the current checksum value

### reset

    public void reset()

  Resets the checksum to its initial value.

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.