java.util.zip: public class: CRC32

java.util.zip
public class: CRC32 [javadoc | source]

java.lang.Object
   java.util.zip.CRC32

All Implemented Interfaces:
Checksum

A class that can be used to compute the CRC-32 of a data stream.

Also see:

Checksum

author: David - Connelly

Constructor:
public CRC32() { } Creates a new CRC32 object.

Constructor:

 public CRC32() {

}

Creates a new CRC32 object.

Method from java.util.zip.CRC32 Summary:
getValue, reset, update, update, update

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from java.util.zip.CRC32 Detail:
public long getValue() { return (long)crc & 0xffffffffL; } Returns CRC-32 value.
public void reset() { crc = 0; } Resets CRC-32 to initial value.
public void update(int b) { crc = update(crc, b); } Updates CRC-32 with specified byte.
public void update(byte[] b) { crc = updateBytes(crc, b, 0, b.length); } Updates checksum with specified array of bytes.
public void update(byte[] b, int off, int len) { if (b == null) { throw new NullPointerException(); } if (off < 0 \|\| len < 0 \|\| off > b.length - len) { throw new ArrayIndexOutOfBoundsException(); } crc = updateBytes(crc, b, off, len); } Updates CRC-32 with specified array of bytes.

Method from java.util.zip.CRC32 Detail:

 public long getValue() {
        return (long)crc & 0xffffffffL;
}

Returns CRC-32 value.

 public  void reset() {
        crc = 0;
}

Resets CRC-32 to initial value.

 public  void update(int b) {
        crc = update(crc, b);
}

Updates CRC-32 with specified byte.

 public  void update(byte[] b) {
        crc = updateBytes(crc, b, 0, b.length);
}

Updates checksum with specified array of bytes.

 public  void update(byte[] b,
    int off,
    int len) {
        if (b == null) {
            throw new NullPointerException();
        }
        if (off <  0 || len <  0 || off  > b.length - len) {
            throw new ArrayIndexOutOfBoundsException();
        }
        crc = updateBytes(crc, b, off, len);
}

Updates CRC-32 with specified array of bytes.