Constructor Detail

• ThreadLocalRandom

  public ThreadLocalRandom()

  Constructor called only by localRandom.initialValue. We rely on the fact that the superclass no-arg constructor invokes setSeed exactly once to initialize.

Method Detail

• current

  public static ThreadLocalRandom current()

  Returns the current thread's ThreadLocalRandom.

  Returns:

  the current thread's ThreadLocalRandom

• setSeed

  public void setSeed​(long seed)

  Throws UnsupportedOperationException. Setting seeds in this generator is not supported.

  Overrides:

  setSeed in class Random

  Throws:

  UnsupportedOperationException - always

• next

  protected int next​(int bits)

  Overrides:

  next in class Random

• nextInt

  public int nextInt​(int least,
                     int bound)

  Returns a pseudorandom, uniformly distributed value between the given least value (inclusive) and bound (exclusive).

  Parameters:

  least - the least value returned

  bound - the upper bound (exclusive)

  Returns:

  the next value

  Throws:

  IllegalArgumentException - if least greater than or equal to bound

• nextLong

  public long nextLong​(long n)

  Returns a pseudorandom, uniformly distributed value between 0 (inclusive) and the specified value (exclusive).

  Parameters:

  n - the bound on the random number to be returned. Must be positive.

  Returns:

  the next value

  Throws:

  IllegalArgumentException - if n is not positive

• nextLong

  public long nextLong​(long least,
                       long bound)

  Returns a pseudorandom, uniformly distributed value between the given least value (inclusive) and bound (exclusive).

  Parameters:

  least - the least value returned

  bound - the upper bound (exclusive)

  Returns:

  the next value

  Throws:

  IllegalArgumentException - if least greater than or equal to bound

• nextDouble

  public double nextDouble​(double n)

  Returns a pseudorandom, uniformly distributed double value between 0 (inclusive) and the specified value (exclusive).

  Parameters:

  n - the bound on the random number to be returned. Must be positive.

  Returns:

  the next value

  Throws:

  IllegalArgumentException - if n is not positive

• nextDouble

  public double nextDouble​(double least,
                           double bound)

  Returns a pseudorandom, uniformly distributed value between the given least value (inclusive) and bound (exclusive).

  Parameters:

  least - the least value returned

  bound - the upper bound (exclusive)

  Returns:

  the next value

  Throws:

  IllegalArgumentException - if least greater than or equal to bound