| java.lang.Object
 java.util.Random
All known Subclasses: java.security.SecureRandom,
| Constructor Summary | |
| public | Random()
Construct a random generator with the current time of day in milliseconds
as the initial state. | | public | Random(long seed)
Construct a random generator with the given seed as the
initial state. |
| Method Summary | |
| protected synchronized int | next(int bits)
Returns a pseudo-random uniformly distributed int value of
the number of bits specified by the argument bits.
Implements D. | | public boolean | nextBoolean()
Answers the next pseudo-random, uniformly distributed boolean value
generated by this generator. | | public void | nextBytes(byte[] buf)
Modifies the byte array by a random sequence of bytes generated by this
random number generator. | | public double | nextDouble()
Generates a normally distributed random double number between 0.0
inclusively and 1.0 exclusively. | | public float | nextFloat()
Generates a normally distributed random float number between 0.0
inclusively and 1.0 exclusively. | | public synchronized double | nextGaussian()
Returns a pseudo-randomly generated, normally distributed
double value with mean 0.0 and a standard deviation value
of 1.0.
Implements G. | | public int | nextInt()
Generates a uniformly distributed 32-bit int value from
the this random number sequence. | | public int | nextInt(int n)
Returns a new pseudo-random integer value which is uniformly distributed
between 0 (inclusively) and n (exclusively). | | public long | nextLong()
Generates a uniformly distributed 64-bit int value from
the this random number sequence. | | public synchronized void | setSeed(long seed)
Modifies the seed using a linear congruential formula, as found in The
Art of Computer Programming, Volume 2, by Donald E. |
| Random | | public Random()(Code) | | Construct a random generator with the current time of day in milliseconds
as the initial state.
See Also: Random.setSeed |
| Random | | public Random(long seed)(Code) | | Construct a random generator with the given seed as the
initial state.
Parameters:
seed - the seed that will determine the initial state of this randomnumber generator
See Also: Random.setSeed |
| nextBoolean | | public boolean nextBoolean()(Code) | | Answers the next pseudo-random, uniformly distributed boolean value
generated by this generator.
boolean a pseudo-random, uniformly distributed boolean value |
| nextBytes | | public void nextBytes(byte[] buf)(Code) | | Modifies the byte array by a random sequence of bytes generated by this
random number generator.
Parameters:
buf - non-null array to contain the new random bytes
See Also: Random.next |
| nextDouble | | public double nextDouble()(Code) | | Generates a normally distributed random double number between 0.0
inclusively and 1.0 exclusively.
a random double between 0.0 and 1.0
See Also: Random.nextFloat |
| nextFloat | | public float nextFloat()(Code) | | Generates a normally distributed random float number between 0.0
inclusively and 1.0 exclusively.
a random float between 0.0 and 1.0
See Also: Random.nextDouble |
| nextGaussian | | public synchronized double nextGaussian()(Code) | | Returns a pseudo-randomly generated, normally distributed
double value with mean 0.0 and a standard deviation value
of 1.0.
Implements G. E. P. Box, M. E. Muller, and G. Marsaglia's polar method
found in The Art of Computer Programming, Volume 2: Seminumerical
Algorithms, by Donald E. Knuth (section 3.4.1).
a pseudo-randomly generated double
See Also: Random.nextDouble |
| nextInt | | public int nextInt(int n)(Code) | | Returns a new pseudo-random integer value which is uniformly distributed
between 0 (inclusively) and n (exclusively).
a randomly generated int between 0 and n
Parameters:
n - the upper limit of the values that can be returned |
| setSeed | | public synchronized void setSeed(long seed)(Code) | | Modifies the seed using a linear congruential formula, as found in The
Art of Computer Programming, Volume 2, by Donald E. Knuth (section
3.2.1).
Parameters:
seed - the seed that alters the state of the random number generator
See Also: Random.next
See Also: Random.Random()
See Also: Random.Random(long) |
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