Java Utililty Methods Object Hash

int combineHashesOrdered(Object... objs)
combine Hashes Ordered

return combineHashesOrdered(Arrays.asList(objs));

int deepHashCode(final Object object)
Returns a hash code for the specified object, which may be an array.

if (object == null) {
 return 0;
if (object instanceof Object[]) {
 return Arrays.deepHashCode((Object[]) object);
if (object instanceof double[]) {
 return Arrays.hashCode((double[]) object);
...

int deepHashCode(Object o)
Gets hash code of an object, optionally returns hash code based on the "deep contents" of array if the object is an array.

if (o == null) {
 return 0;
if (!o.getClass().isArray()) {
 return o.hashCode();
if (o instanceof Object[]) {
 return Arrays.deepHashCode((Object[]) o);
...

String getIdentityAsHex(Object object)
Gets the identity hashcode of the given Object as 8-digit hex-number.

return String.format("%08x", Integer.valueOf(System.identityHashCode(object)));

int hash(Object o)
hash

if (o == null)
 return 0;
return o.hashCode();

int hash(Object... objects)
Generates a hash code for a collection of objects using Arrays#hashCode(Object[]) .

return Arrays.hashCode(objects);

int hash(Object... values)
Generates a hash code for a sequence of input values.

return Arrays.hashCode(values);

int hashCode(final Object o)
hash Code

if (o == null) {
 return NullHashCode;
if (o.getClass().isArray()) {
 if (o instanceof Object[]) {
 return combineHashCodes((Object[]) o);
 if (o instanceof byte[]) {
...

int hashCode(final Object... objects)
Generates a hash code for multiple values.

return Arrays.hashCode(objects);

int hashCode(final Object... objects)
Compute a combined hash code from the supplied objects.

if ((objects == null) || (objects.length == 0)) {
 return 0;
int hc = 0;
for (Object object : objects) {
 hc = PRIME * hc;
 if (object instanceof byte[]) {
 hc += Arrays.hashCode((byte[]) object);
...