Java Utililty Methods HashMap Create

List of utility methods to do HashMap Create

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HashMap Create

Description

The list of methods to do HashMap Create are organized into topic(s).

Method

HashMap createHashMap()
Creates a mutable, empty HashMap instance.

return new HashMap<K, V>();

HashMap createHashMap()
create Hash Map

return new HashMap<K, V>();

Map createHashMap(int expectedMapSize)
Utility method that creates an java.util.HashMap with its initialCapacity calculated to minimize rehash operations

int initialCapacity = (int) (expectedMapSize / HASHMAP_DEFAULT_LOAD_FACTOR) + 1;
return new HashMap<K, V>(initialCapacity);

HashMap createHashMap(int initialCapacity)
create Hash Map

return new HashMap<K, V>(initialCapacity);

Map createHashMap(int initialCapacity)
Returns a hash map typed to the generics specified in the method call with the given initial capacity

return new HashMap<K, V>(initialCapacity);

Map createHashMap(int size)
Creates the hash map instance that will hold the given amount of elements.

return new HashMap<K, V>((int) (size * 1.1), 0.95f);

Map createHashMap(Object key, Object value)
create Hash Map

Map<Object, Object> map = new HashMap<Object, Object>();
map.put(key, value);
return map;

Map createHashMapIfNull(Map map)
create Hash Map If Null

if (map == null) {
 map = new HashMap<K, V>();
return map;

HashMap createHashMapWithSize(final int size)
Creates a new HashMap with the given expected size.

final int initialCapacity = (int) Math.ceil(size / DEFAULT_LOAD_FACTOR);
return new HashMap<KeyType, ValueType>(initialCapacity, DEFAULT_LOAD_FACTOR);

Map getHashMap()
get Hash Map

return new HashMap<K, V>();