Java Utililty Methods Collection Empty

List of utility methods to do Collection Empty

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Description

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

Method

CollectionemptyToNull(final Collection value)
If the given collection is empty null is returned. 
return value.isEmpty() ? null : value;
CollectiongetSingletonCollectionOrEmptyIfNull(T o)
get Singleton Collection Or Empty If Null 
if (o == null)
    return Collections.emptySet();
else
    return Collections.singleton(o);
booleanisAnyEmpty(Collection... collections)
is Any Empty 
if (collections == null) {
    return true;
for (Collection<?> collection : collections) {
    if (isEmpty(collection)) {
        return true;
return false;
booleanisCollectionEmpty(Collection collection)
is Collection Empty 
boolean isEmpty = true;
Iterator iterator = collection.iterator();
while (iterator.hasNext() && isEmpty) {
    Object object = iterator.next();
    if (object != null) {
        isEmpty = false;
return isEmpty;
BooleanisCollectionEmpty(Collection oneCol)
is Collection Empty 
return (oneCol == null || oneCol.isEmpty() || oneCol.size() < 1);
booleanisCollectionEmpty(Collection value)
is Collection Empty 
if (isNull(value)) {
    return true;
return value.isEmpty();
booleanisCollectionNotEmpty(Collection collection)
is Collection Not Empty 
return !isCollectionEmpty(collection);
booleanisCollectionNullOrEmpty(Collection collection)
is Collection Null Or Empty 
return collection == null || collection.isEmpty();
booleanisEmpty(Collection c)
Check whether collection c is empty. 
return ((c == null) || (c.size() == 0));
booleanisEmpty(Collection c)
is Empty 
return c == null || c.isEmpty();