/**
* Returns a shallow copy of this <tt>HashMap</tt> instance: the keys and values themselves are
* not cloned.
*
* @return a shallow copy of this map
*/
public Object clone() {
HashMap<K, V> result = null;
try {
result = (HashMap<K, V>) super.clone();
} catch (CloneNotSupportedException e) {
// assert false;
}
result.table = new Entry[table.length];
result.entrySet = null;
result.modCount = 0;
result.size = 0;
result.init();
result.putAllForCreate(this);
return result;
}
/**
* Constructs a new <tt>HashMap</tt> with the same mappings as the specified <tt>Map</tt>. The
* <tt>HashMap</tt> is created with default load factor (0.75) and an initial capacity sufficient
* to hold the mappings in the specified <tt>Map</tt>.
*
* @param m the map whose mappings are to be placed in this map
* @throws NullPointerException if the specified map is null
*/
public HashMap(Map<? extends K, ? extends V> m) {
this(
Math.max((int) (m.size() / DEFAULT_LOAD_FACTOR) + 1, DEFAULT_INITIAL_CAPACITY),
DEFAULT_LOAD_FACTOR);
putAllForCreate(m);
}