Java Utililty Methods Integer Hash

int intHash(final long a)
If the specified value is in int range, the returned value is identical.

int hash = (int) (a >> 32) + (int) a;
if (a < 0) {
 hash++;
return hash;

int intHash(int i)
int Hash

return (i << 16) | (i >>> 16);

int intHash(int input)
Redistribute integer identifier keyspace using Knuth's multiplicative method.

long unsignedValue = ((long) input) - Integer.MIN_VALUE;
long unsignedIntMax = (1l << 32);
long unsignedHashValue = ((unsignedValue * 2654435761l) % unsignedIntMax);
return (int) (unsignedHashValue + Integer.MIN_VALUE);

int intHash(int key)
int Hash

key += ~(key << 15);
key ^= (key >>> 10);
key += (key << 3);
key ^= (key >>> 6);
key += ~(key << 11);
key ^= (key >>> 16);
return key;

int intHash(int number, int max)
int Hash

int hash = number % max;
return hash < 0 ? hash * -1 : hash;

int intHash(long a)
If the specified value is in int range, the returned value is identical.

if (false) {
 int hash = ((int) (a >> 32)) ^ ((int) a);
 if (a < 0) {
 hash = -hash - 1;
 return hash;
int hash = ((int) (a >> 32)) + ((int) a);
...

int intHashCode(final int value)
Create a hash code of an integer value.

int v;
v = (value + 0xad4497fc);
v += ~(v << 9);
v ^= (v >>> 14);
v += (v << 4);
v ^= (v >>> 10);
return v;

int intHashCode(int i)
int Hash Code

return i;

long intHashToLong(int hash)
int Hash To Long

return (long) hash;