Class RandomUtils

java.lang.Object
com.biglybt.core.util.RandomUtils
public class RandomUtils extends Object

  • Field Details

    • RANDOM

      public static final Random RANDOM

    • INSTANCE_ID

      public static final String INSTANCE_ID

    • SECURE_RANDOM

      public static final SecureRandom SECURE_RANDOM

    • LISTEN_PORT_MIN

      public static final int LISTEN_PORT_MIN
      See Also:

    • LISTEN_PORT_MAX

      public static final int LISTEN_PORT_MAX
      See Also:

  • Constructor Details

    • RandomUtils

      public RandomUtils()

  • Method Details

    • generateRandomBytes

      public static byte[] generateRandomBytes(int num_to_generate)
      Generate a random array of bytes.
      Parameters:
      num_to_generate - number of bytes to generate
      Returns:
      random byte array

    • generateRandomAlphanumerics

      public static String generateRandomAlphanumerics(int num_to_generate)
      Generate a random string of characters.
      Parameters:
      num_to_generate - number of chars to generate
      Returns:
      random char string

    • generateRandomNetworkListenPort

      public static int generateRandomNetworkListenPort()
      Generate a random port number for binding a network IP listening socket to. NOTE: Will return a valid non-privileged port number >= LISTEN_PORT_MIN and invalid input: '<'= LISTEN_PORT_MAX.
      Returns:
      random port number

    • generateRandomNetworkListenPort

      public static int generateRandomNetworkListenPort(int min_port, int max_port)

    • generateRandomPlusMinus1

      public static int generateRandomPlusMinus1()
      Generates a random +1 or -1
      Returns:
      +1 or -1

    • nextFloat

      public static float nextFloat()

    • nextBytes

      public static void nextBytes(byte[] bytes)

    • nextSecureBytes

      public static void nextSecureBytes(byte[] bytes)

    • nextSecureHash

      public static byte[] nextSecureHash()

    • nextHash

      public static byte[] nextHash()

    • nextInt

      public static int nextInt(int n)

    • nextByte

      public static byte nextByte()

    • nextInt

      public static int nextInt()

    • nextAbsoluteInt

      public static int nextAbsoluteInt()

    • nextLong

      public static long nextLong()

    • nextLong

      public static long nextLong(long n)

    • nextAbsoluteLong

      public static long nextAbsoluteLong()

    • nextSecureAbsoluteLong

      public static long nextSecureAbsoluteLong()

    • generateRandomIntUpto

      public static int generateRandomIntUpto(int max)
      Returns:
      random int between 0 and max-1. e.g. param of 10 returns 0->9

    • generateRandomIntBetween

      public static int generateRandomIntBetween(int min, int max)
      Returns:
      random int between min and max, e.g params of [5,7] returns 5,6 or 7