Java Utililty Methods Collection Empty

List of utility methods to do Collection Empty

HOME
Java
C
Collection Empty

Description

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

Method

Collection emptyToNull(final Collection value)
If the given collection is empty null is returned.

return value.isEmpty() ? null : value;

Collection getSingletonCollectionOrEmptyIfNull(T o)
get Singleton Collection Or Empty If Null

if (o == null)
 return Collections.emptySet();
else
 return Collections.singleton(o);

boolean isAnyEmpty(Collection... collections)
is Any Empty

if (collections == null) {
 return true;
for (Collection<?> collection : collections) {
 if (isEmpty(collection)) {
 return true;
return false;

boolean isCollectionEmpty(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;

Boolean isCollectionEmpty(Collection oneCol)
is Collection Empty

return (oneCol == null || oneCol.isEmpty() || oneCol.size() < 1);

boolean isCollectionEmpty(Collection value)
is Collection Empty

if (isNull(value)) {
 return true;
return value.isEmpty();

boolean isCollectionNotEmpty(Collection collection)
is Collection Not Empty

return !isCollectionEmpty(collection);

boolean isCollectionNullOrEmpty(Collection collection)
is Collection Null Or Empty

return collection == null || collection.isEmpty();

boolean isEmpty(Collection c)
Check whether collection c is empty.

return ((c == null) || (c.size() == 0));

boolean isEmpty(Collection c)
is Empty

return c == null || c.isEmpty();