程序包 net.apexes.commons.lang

类 MurmurHash

java.lang.Object
net.apexes.commons.lang.MurmurHash
public final class MurmurHash extends Object
Murmur hash 2.0

The murmur hash is a relative fast hash function from http://murmurhash.googlepages.com/ for platforms with efficient multiplication.

This is a re-implementation of the original C code plus some additional features.

Public domain.

版本:
1.0.2
作者:
Viliam Holub

  • 构造器概要

    构造器
    构造器
    说明
    MurmurHash()
     

  • 方法概要

    修饰符和类型
    方法
    说明
    static int
    hash32(byte[] data, int length)
    Generates 32 bit hash from byte array with default seed value.
    static int
    hash32(byte[] data, int length, int seed)
    Generates 32 bit hash from byte array of the given length and seed.
    static int
    hash32(String text)
    Generates 32 bit hash from a string.
    static int
    hash32(String text, int from, int length)
    Generates 32 bit hash from a substring.
    static long
    hash64(byte[] data, int length)
    Generates 64 bit hash from byte array with default seed value.
    static long
    hash64(byte[] data, int length, int seed)
    Generates 64 bit hash from byte array of the given length and seed.
    static long
    hash64(String text)
    Generates 64 bit hash from a string.
    static long
    hash64(String text, int from, int length)
    Generates 64 bit hash from a substring.

    从类继承的方法 java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • 构造器详细资料

    • MurmurHash

      public MurmurHash()

  • 方法详细资料

    • hash32

      public static int hash32(byte[] data, int length, int seed)
      Generates 32 bit hash from byte array of the given length and seed.
      参数:
      data - byte array to hash
      length - length of the array to hash
      seed - initial seed value
      返回:
      32 bit hash of the given array

    • hash32

      public static int hash32(byte[] data, int length)
      Generates 32 bit hash from byte array with default seed value.
      参数:
      data - byte array to hash
      length - length of the array to hash
      返回:
      32 bit hash of the given array

    • hash32

      public static int hash32(String text)
      Generates 32 bit hash from a string.
      参数:
      text - string to hash
      返回:
      32 bit hash of the given string

    • hash32

      public static int hash32(String text, int from, int length)
      Generates 32 bit hash from a substring.
      参数:
      text - string to hash
      from - starting index
      length - length of the substring to hash
      返回:
      32 bit hash of the given string

    • hash64

      public static long hash64(byte[] data, int length, int seed)
      Generates 64 bit hash from byte array of the given length and seed.
      参数:
      data - byte array to hash
      length - length of the array to hash
      seed - initial seed value
      返回:
      64 bit hash of the given array

    • hash64

      public static long hash64(byte[] data, int length)
      Generates 64 bit hash from byte array with default seed value.
      参数:
      data - byte array to hash
      length - length of the array to hash
      返回:
      64 bit hash of the given string

    • hash64

      public static long hash64(String text)
      Generates 64 bit hash from a string.
      参数:
      text - string to hash
      返回:
      64 bit hash of the given string

    • hash64

      public static long hash64(String text, int from, int length)
      Generates 64 bit hash from a substring.
      参数:
      text - string to hash
      from - starting index
      length - length of the substring to hash
      返回:
      64 bit hash of the given array