- All Implemented Interfaces:
- public class PureSpinner
- extends java.util.Random
This class uses the scheduler to gather entropy.
To generate one byte of data it launches a thread which counts in a
tight loop. After a certain time, this thread is killed and the 8
lowest order bytes of the counter are returned.
The spin-period is set when a PureSpinner object is created. It is
chosen so that the counter will reach at least 1024 when a byte is
generated. However, under excessive load the counter may not count
much above 256.
The output of this RNG is may not have very good statistical properties,
but each byte of data should contain one or two bits of entropy. It
should not be used directly, but rather to gather entropy for another
PRNG class such as the RandomSpinner class.
The helper class which does the actual number generation is based on code by
Henry Strickland (email@example.com)
and Greg Noel (firstname.lastname@example.org).
This was in turn based on similar C code by Matt Blaze, Jack Lacy, and
- Logi Ragnarsson
- See Also:
Spinner, Serialized Form
Generates a user specified number of random bytes.
|Methods inherited from class java.util.Random
nextBoolean, nextDouble, nextFloat, nextGaussian, nextInt, nextInt, nextLong, setSeed
|Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public void nextBytes(byte bytes)
- Generates a user specified number of random bytes.
nextBytes in class
Copyright 1997-2000 Logi Ragnarsson