public static <K, V> HashMap<K, V> optimizedHashMap(final int s,
            final float lf) {
        return new HashMap<K, V>(s, lf);
    }
public static < K , V > HashMap < K , V > optimizedHashMap ( final int s , final float lf ) { return new HashMap < K , V > ( s , lf ) ; }
Returns a hash map of type {@code K, V} optimized to the specified
capacity and load factor.
<p>
Use optimized hash maps when the capacity of a hash map is known to be
greater than sixteen (the default initial capacity) and a load factor is
desired to control resizing behavior. The hash map implementation will
automatically adjust the size to the next nearest power of two.
</p>

@param <K> Formal type parameter key
@param <V> Formal type parameter value
@param s Initial hash map capacity
@param lf Hash map load factor
@return Hash map of type {@code K, V}