Java Utililty Methods Collection Equal

List of utility methods to do Collection Equal

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Description

The list of methods to do Collection Equal are organized into topic(s).

Method

booleanequals(Iterable collection1, Iterable collection2)
Returns true if the elements of the two given Collection s are equal and have the same order 
boolean retval = false;
if (collection1 != null && collection2 != null) {
    Iterator<?> iteratorOther = collection2.iterator();
    Iterator<?> iteratorThis = collection1.iterator();
    retval = true;
    while (iteratorOther.hasNext() && iteratorThis.hasNext()) {
        Object elementOther = iteratorOther.next();
        Object elementThis = iteratorThis.next();
...
booleanequalsAny(Object object, Collection objects)
Checks whether object equals any of objects , using the Object#equals(Object) method in object for comparisons. 
for (Object o : objects) {
    if (object == null && o == null) {
        return true;
    } else if (object != null && object.equals(o)) {
        return true;
return false;
...
booleanequalsCollectionsAnyOrder(Collection i1, Collection i2)
Check if values in iterables are identical (in any order) This method check sizes first For first collection calls Iterable#iterator() only once, and several times for second collection (max = size of collection) 
if (i1 == i2) {
    return true;
if (i1 == null) {
    if (i2 == null) {
        return true;
    return false;
...
BooleanequalsNull(Collection collection)
equals Null 
return collection == null;
booleanequalsOne(final T o1, final Collection others)
equals One 
for (final Object o : others) {
    if (o.equals(o1)) {
        return true;
return false;
booleanequalsSet(Collection c1, Collection c2)
equals Set 
boolean equals;
if (c1 == null) {
    equals = (c2 == null);
} else if (c2 == null) {
    equals = false;
} else if (c1.size() == c2.size()) {
    equals = true;
    Iterator iterC1 = c1.iterator();
...
booleanequalsSet(Collection c1, Collection c2)
equals Set 
return new HashSet(c1).equals(new HashSet(c2));
booleanequalsUnordered(Collection collection1, Collection collection2)
Tests, if the two collection have the same elements. 
boolean retval = collection1.size() == collection2.size();
for (Object iObject : collection1) {
    retval &= collection2.contains(iObject);
return retval;
booleanequalsUnordered(Collection collection1, Collection collection2)
equals Unordered 
return collection1 == collection2
        || (collection1.size() == collection2.size() && collection1.containsAll(collection2));
booleanequalsUnorderedCollections(Collection a, Collection b)
Compares the elements of two collections using Object.equals on the elements. 
if (a == b) {
    return true;
if (a.size() != b.size())
    return false;
List<T> _b = new ArrayList<T>(b);
for (final T elemA : a) {
    boolean foundMatching = false;
...