com.github.houbb.data.struct.util

类 HashUtil

java.lang.Object

com.github.houbb.data.struct.util.HashUtil

public final class HashUtil
extends Object

hash 工具类

从以下版本开始:

0.0.1

作者:

binbin.hou

方法概要

限定符和类型	方法和说明
static int	hash(Object object) Retrieve object hash code and applies a supplemental hash function to the result hash, which defends against poor quality hash functions.
static int	indexFor(int h, int length) Returns index for hash code h.

从类继承的方法 java.lang.Object

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

方法详细资料

hash

public static int hash(Object object)

Retrieve object hash code and applies a supplemental hash function to the result hash, which defends against poor quality hash functions. This is critical because HashMap uses power-of-two length hash tables, that otherwise encounter collisions for hashCodes that do not differ in lower bits. Note: Null keys always map to hash 0, thus index 0.

参数:

object - 对象

返回:

hash 結果

indexFor

public static int indexFor(int h,
                           int length)

Returns index for hash code h.

参数:

h - hash 值

length - 整体长度

返回:

hash 結果