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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 2003 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.