public final class JVMRandom extends Random
JVMRandom
is a wrapper that supports all possible
Random methods via the Math.random()
method
and its system-wide Random
object.
It does this to allow for a Random class in which the seed is shared between all members of the class - a better name would have been SharedSeedRandom.
N.B. the current implementation overrides the methods
Random.nextInt(int)
and Random.nextLong()
to produce positive numbers ranging from 0 (inclusive)
to MAX_VALUE (exclusive).
Constructor and Description |
---|
JVMRandom()
Constructs a new instance.
|
Modifier and Type | Method and Description |
---|---|
boolean |
nextBoolean()
Returns the next pseudorandom, uniformly distributed boolean value
from the Math.random() sequence.
|
void |
nextBytes(byte[] byteArray)
Unsupported in 2.0.
|
double |
nextDouble()
Synonymous to the Math.random() call.
|
float |
nextFloat()
Returns the next pseudorandom, uniformly distributed float value
between
0.0 and 1.0 from the Math.random()
sequence. |
double |
nextGaussian()
Unsupported in 2.0.
|
int |
nextInt()
Returns the next pseudorandom, uniformly distributed int value
from the Math.random() sequence.
|
int |
nextInt(int n)
Returns a pseudorandom, uniformly distributed int value between
0 (inclusive) and the specified value (exclusive), from
the Math.random() sequence. |
long |
nextLong()
Returns the next pseudorandom, uniformly distributed long value
from the Math.random() sequence.
|
static long |
nextLong(long n)
Returns a pseudorandom, uniformly distributed long value between
0 (inclusive) and the specified value (exclusive), from
the Math.random() sequence. |
void |
setSeed(long seed)
Unsupported in 2.0.
|
public void setSeed(long seed)
setSeed
in class Random
seed
- ignoredUnsupportedOperationException
public double nextGaussian()
nextGaussian
in class Random
UnsupportedOperationException
public void nextBytes(byte[] byteArray)
nextBytes
in class Random
byteArray
- ignoredUnsupportedOperationException
public int nextInt()
Returns the next pseudorandom, uniformly distributed int value from the Math.random() sequence.
Identical tonextInt(Integer.MAX_VALUE)
N.B. All values are >= 0.
public int nextInt(int n)
Returns a pseudorandom, uniformly distributed int value between
0
(inclusive) and the specified value (exclusive), from
the Math.random() sequence.
nextInt
in class Random
n
- the specified exclusive max-valueIllegalArgumentException
- when n <= 0
public long nextLong()
Returns the next pseudorandom, uniformly distributed long value from the Math.random() sequence.
Identical tonextLong(Long.MAX_VALUE)
N.B. All values are >= 0.
public static long nextLong(long n)
Returns a pseudorandom, uniformly distributed long value between
0
(inclusive) and the specified value (exclusive), from
the Math.random() sequence.
n
- the specified exclusive max-valueIllegalArgumentException
- when n <= 0
public boolean nextBoolean()
Returns the next pseudorandom, uniformly distributed boolean value from the Math.random() sequence.
nextBoolean
in class Random
public float nextFloat()
Returns the next pseudorandom, uniformly distributed float value
between 0.0
and 1.0
from the Math.random()
sequence.
public double nextDouble()
Synonymous to the Math.random() call.
nextDouble
in class Random
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