Constructor Detail

• RandomUtils

  public RandomUtils()

  RandomUtils instances should NOT be constructed in standard programming. Instead, the class should be used as RandomUtils.nextBytes(5);.

  This constructor is public to permit tools that require a JavaBean instance to operate.

Method Detail

• nextBytes

  public static byte[] nextBytes(int count)

  Creates an array of random bytes.

  Parameters:

  count - the size of the returned array

  Returns:

  the random byte array

  Throws:

  IllegalArgumentException - if count is negative

• nextInt

  public static int nextInt(int startInclusive,
            int endExclusive)

  Returns a random integer within the specified range.

  Parameters:

  startInclusive - the smallest value that can be returned, must be non-negative

  endExclusive - the upper bound (not included)

  Returns:

  the random integer

  Throws:

  IllegalArgumentException - if startInclusive > endExclusive or if startInclusive is negative

• nextLong

  public static long nextLong(long startInclusive,
              long endExclusive)

  Returns a random long within the specified range.

  Parameters:

  startInclusive - the smallest value that can be returned, must be non-negative

  endExclusive - the upper bound (not included)

  Returns:

  the random long

  Throws:

  IllegalArgumentException - if startInclusive > endExclusive or if startInclusive is negative

• nextDouble

  public static double nextDouble(double startInclusive,
                  double endInclusive)

  Returns a random double within the specified range.

  Parameters:

  startInclusive - the smallest value that can be returned, must be non-negative

  endInclusive - the upper bound (included)

  Returns:

  the random double

  Throws:

  IllegalArgumentException - if startInclusive > endInclusive or if startInclusive is negative

• nextFloat

  public static float nextFloat(float startInclusive,
                float endInclusive)

  Returns a random float within the specified range.

  Parameters:

  startInclusive - the smallest value that can be returned, must be non-negative

  endInclusive - the upper bound (included)

  Returns:

  the random float

  Throws:

  IllegalArgumentException - if startInclusive > endInclusive or if startInclusive is negative