public class Maps extends Object
Constructor and Description |
---|
Maps() |
Modifier and Type | Method and Description |
---|---|
static boolean |
isNullOrEmpty(Map<?,?> map)
Indicates whether the given
Map is null or empty. |
static <K,V> ConcurrentMap<K,V> |
newConcurrentHashMap()
Returns a mutable
ConcurrentMap that is empty. |
static <K,V> Map<K,V> |
newHashMap()
Returns a mutable
HashMap that is empty. |
static <K,V> WeakHashMap<K,V> |
newWeakHashMap()
Returns a mutable
WeakHashMap that is empty. |
public static <K,V> Map<K,V> newHashMap()
HashMap
that is empty.K
- the type of the keyV
- the type of the valueHashMap
.public static <K,V> ConcurrentMap<K,V> newConcurrentHashMap()
ConcurrentMap
that is empty.K
- the type of the keyV
- the type of the valueConcurrentMap
.public static <K,V> WeakHashMap<K,V> newWeakHashMap()
WeakHashMap
that is empty.K
- the type of the keyV
- the type of the valueWeakHashMap
.public static boolean isNullOrEmpty(Map<?,?> map)
Map
is null
or empty.map
- the map to check.true
if the given Map
is null
or empty, otherwise false
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