Java Utililty Methods HashMap Create

List of utility methods to do HashMap Create

Description

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

Method

HashMapnewHashMap()
new Hash Map
return new HashMap<K, V>();
HashMapnewHashMap()
new Hash Map
return new HashMap<K, V>();
HashMapnewHashMap(final int initCapacity)
Creates a new parameterized HashMap with a specified initial capacity.
return new HashMap<K, V>(initCapacity);
HashMapnewHashMap(final int size)
Returns a new HashMap initialized with a large enough capacity to allow adding size elements without causing a rehash.
return new HashMap<>(hashCapacityForSize(size));
HashMapnewHashMap(final K key, final V value)
Returns newly created HashMap with the specified key and value pair added.
final HashMap<K, V> map = new HashMap<K, V>(1);
map.put(key, value);
return map;
MapnewHashMap(int capacity)
Create a new hash map.
return new HashMap<K, V>(capacity);
HashMapnewHashMap(int size)
new Hash Map
return new HashMap<K, V>(getInitialCapacityFromExpectedSize(size));
HashMapnewHashMap(int size)
new HashMap and initialCapacity
return new HashMap<K, V>();
HashMapnewHashMap(int size)
Create new HashMap .
return new HashMap<K, V>(size);
MapnewHashMap(K[] keys, V[] values)
Create a new hash map and fills it from the given keys and values (keys[index] -> values[index].
Map<K, V> map = new HashMap<K, V>();
if (keys == null || values == null || keys.length != values.length) {
    throw new IllegalArgumentException("keys and values must be non-null and have the same size.");
for (int i = 0; i < keys.length; i++) {
    map.put(keys[i], values[i]);
return map;
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