Java Utililty Methods Hash Calculate

List of utility methods to do Hash Calculate

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Description

The list of methods to do Hash Calculate are organized into topic(s).

Method

inthashCapacityForSize(final int size)
Returns the minimal capacity of hash-based structures (e.g. 
return size * 4 / 3 + 1;
inthashCharArray(int seed, char... charArray)
Calculates hash code for char array. 
return hash(seed, charArray);
inthashClassName(Class clazz)
hash Class Name 
String className = clazz.getName();
return hashString(className);
inthashCombine(int seed, int hash)
from clojure.Util 
return seed ^ (hash + 0x9e3779b9 + (seed << 6) + (seed >> 2));
inthashCombine(int seed, int hash)
hash Combine 
seed ^= hash + 0x9e3779b9 + (seed << 6) + (seed >> 2);
return seed;
voidhashDisp(long hash)
hash Disp 
long cntrl = hash & 0xFF;
long cmd = (hash >> 8) & 0xFF;
long chn = (hash >> 16) & 0xFF;
System.out.println(chn + "  " + cmd + " " + cntrl);
inthashDouble(double val)
hash Double 
long bits = Double.doubleToLongBits(val);
return (int) (bits ^ bits >>> 32);
booleanhashEqules(Object source, Object obj)
hash Equles 
return (hash(source) == hash(obj));
inthashFloat(float value)
hash Float 
return Float.floatToIntBits(value);
longhashFloatBits(long hash, float f)
hash Float Bits 
hash *= 31L;
if (f == 0.0f)
    return hash;
return hash + Float.floatToIntBits(f);