Java Utililty Methods Hash Code Calculate

List of utility methods to do Hash Code Calculate

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Description

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

Method

inthashCode(int[] ai)
hash Code 
int hashcode = 0;
for (int i : ai) {
    hashcode = hashcode * 31 + i;
return hashcode;
inthashCode(int[] array)
Returns a hash code value for the array 
final int prime = 31;
if (array == null)
    return 0;
int result = 1;
for (int index = 0; index < array.length; index++) {
    result = (prime * result) + array[index];
return result;
...
inthashCode(int[][] arrays)
hash Code 
if (arrays == null) {
    return 0;
int result = 1;
int h = arrays.length;
int w = arrays[0].length;
int value = 0;
for (int i = 0; i < h; i++) {
...
inthashCode(Iterable iterable)
Generates a Object#hashCode() for a given Iterable and its elements. 
final int prime = 31;
int result = 1;
if (iterable != null) {
    for (Object object : iterable) {
        result = prime * result + ((object == null) ? 0 : object.hashCode());
return result;
...
inthashCode(long a[])
Returns a hash code based on the contents of the specified array. 
if (a == null)
    return 0;
int result = 1;
for (long element : a) {
    int elementHash = (int) (element ^ (element >>> 32));
    result = 31 * result + elementHash;
return result;
...
inthashCode(long longVal)
Get standard Java hashCode for a long without the extra object creation. 
return (int) (longVal ^ (longVal >>> 32));
inthashCode(long value)
Return a hash code of the given long integer value. 
return (int) (value ^ (value >>> Integer.SIZE));
inthashCode(long x)
Compute a hash code for the given bitset. 
long hash = 0x76543210L ^ x;
return (int) ((hash >> 32) ^ hash);
inthashCode(long[] a, int fromIndex, int toIndex)
hash Code 
int hashCode = 1;
int i = fromIndex;
while (i < toIndex) {
    long v = a[i];
    hashCode = 31 * hashCode + (int) (v ^ (v >>> 32));
    ++i;
return hashCode;
...
inthashCode(Object a)
Get the hashCode of an object. 
try {
    return a.hashCode();
} catch (NullPointerException ex) {
    if (a == null) {
        return 0;
    } else {
        throw ex;