Class Overview
The CRC32 class is used to compute a CRC32 checksum from data provided as
input value. See also Adler32 which is almost as good, but cheaper.
Summary
| Public Constructors |
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CRC32()
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| Public Methods |
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long
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getValue()
Returns the CRC32 checksum for all input received.
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void
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reset()
Resets the CRC32 checksum to it initial state.
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void
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update(byte[] buf, int offset, int byteCount)
Update this CRC32 checksum with the contents of buf,
starting from offset and reading byteCount bytes of data.
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void
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update(int val)
Updates this checksum with the byte value provided as integer.
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void
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update(byte[] buf)
Updates this checksum with the bytes contained in buffer buf.
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[Expand]
Inherited Methods |
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From class
java.lang.Object
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Object
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clone()
Creates and returns a copy of this Object.
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boolean
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equals(Object o)
Compares this instance with the specified object and indicates if they
are equal.
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void
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finalize()
Invoked when the garbage collector has detected that this instance is no longer reachable.
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final
Class<?>
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getClass()
Returns the unique instance of Class that represents this
object's class.
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int
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hashCode()
Returns an integer hash code for this object.
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final
void
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notify()
Causes a thread which is waiting on this object's monitor (by means of
calling one of the wait() methods) to be woken up.
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final
void
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notifyAll()
Causes all threads which are waiting on this object's monitor (by means
of calling one of the wait() methods) to be woken up.
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String
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toString()
Returns a string containing a concise, human-readable description of this
object.
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final
void
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wait()
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.
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final
void
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wait(long millis, int nanos)
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the
specified timeout expires.
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final
void
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wait(long millis)
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the
specified timeout expires.
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From interface
java.util.zip.Checksum
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abstract
long
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getValue()
Returns the current calculated checksum value.
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abstract
void
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reset()
Resets the checksum value applied before beginning calculations on a new
stream of data.
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abstract
void
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update(byte[] buf, int off, int nbytes)
Updates the checksum with the given bytes.
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abstract
void
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update(int val)
Updates the checksum value with the given byte.
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Public Constructors
Public Methods
public
long
getValue
()
Returns the CRC32 checksum for all input received.
Returns
- The checksum for this instance.
public
void
reset
()
Resets the CRC32 checksum to it initial state.
public
void
update
(byte[] buf, int offset, int byteCount)
Update this CRC32 checksum with the contents of buf,
starting from offset and reading byteCount bytes of data.
Parameters
| buf
| the byte array from which to read the bytes. |
| offset
| the initial position in buf to read the bytes from. |
| byteCount
| the number of bytes to read from buf.
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public
void
update
(int val)
Updates this checksum with the byte value provided as integer.
Parameters
| val
| represents the byte to update the checksum.
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public
void
update
(byte[] buf)
Updates this checksum with the bytes contained in buffer buf.
Parameters
| buf
| the buffer holding the data to update the checksum with.
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