CRC64Checksum (biojava 6.0.0 API)

java.lang.Object
- org.biojava.nbio.core.util.CRC64Checksum

All Implemented Interfaces:

Checksum
```
public class CRC64Checksum
extends Object
implements Checksum
```
Utility class that calculates a CRC64 checksum on a stream of bytes. Code was based on some from BioPerl. Note that we use longs then cast them to avoid the lack of an unsigned int in Java. Longs are 64-bit but we are only using the bottom 32 bits. An int is 32-bit but encodes sign so we can get amusing results if we don't allow for this.

Author:

Unknown. Copied from Expasy4J for convenience. See http://dev.isb-sib.ch/projects/expasy4j/

Constructor Summary

Constructors
Constructor Description

CRC64Checksum()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`getValue()`
`void`	`reset()`
`String`	`toString()`	Returns a zero-padded 16 character wide string containing the current value of this checksum in uppercase hexadecimal format.
`void`	`update(byte[] b, int offset, int length)`	Updates the CRC-64 checksum with the specified array of bytes.
`void`	`update(int b)`
`void`	`update(String s)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.zip.Checksum
update, update

- Constructor Detail
  - CRC64Checksum
```
public CRC64Checksum()
```
- Method Detail
  - update
```
public void update(int b)
```
    Specified by:
    
    update in interface Checksum
  - update
```
public void update(byte[] b,
                   int offset,
                   int length)
```
    Updates the CRC-64 checksum with the specified array of bytes.
    Note that BioJava before version 6.0 implemented this method incorrectly, using length as an index.
    
    Specified by:
    
    update in interface Checksum
    
    Throws:
    
    IllegalArgumentException - if offset is negative, or length is negative, or offset+length is negative or greater than the length of the array b.
  - update
```
public void update(String s)
```
  - getValue
```
public long getValue()
```
    Specified by:
    
    getValue in interface Checksum
  - toString
```
public String toString()
```
    Returns a zero-padded 16 character wide string containing the current value of this checksum in uppercase hexadecimal format.
    
    Overrides:
    
    toString in class Object
  - reset
```
public void reset()
```
    Specified by:
    
    reset in interface Checksum