public final class CollectionUtil extends Object
Modifier and Type | Method and Description |
---|---|
static <K,V> List<V> |
addToValueList(Map<K,List<V>> map,
K key,
V value)
Add value to list of values in the map.
|
static <T> T |
getItemAtPositionOrNull(Collection<T> collection,
int position)
Return n-th item or null if collection is smaller
|
static boolean |
isEmpty(Collection collection)
Returns
true if the given collection is null or empty, otherwise returns false . |
static boolean |
isNotEmpty(Collection collection)
Returns
true if the given collection is not null and not empty, otherwise returns false . |
public static boolean isEmpty(Collection collection)
true
if the given collection is null or empty, otherwise returns false
.collection
- the given collection.true
if collection is empty.public static boolean isNotEmpty(Collection collection)
true
if the given collection is not null and not empty, otherwise returns false
.collection
- the given collection.true
if collection is not empty.public static <K,V> List<V> addToValueList(Map<K,List<V>> map, K key, V value)
map
- key
- value
- public static <T> T getItemAtPositionOrNull(Collection<T> collection, int position)
T
- collection
- position
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