/** Offloaded version of put for null keys */
private V putForNullKey(V value) {
for (Entry<K, V> e = table[0]; e != null; e = e.next) {
if (e.key == null) {
V oldValue = e.value;
e.value = value;
e.recordAccess(this);
return oldValue;
}
}
modCount++;
addEntry(0, null, value, 0);
return null;
}
public Object haeb(Key key, Object value) {
int hash = hash(key.hashCode());
int i = indexFor(hash, table.length);
for (Entry<Key, Object> e = table[i]; e != null; e = e.next) {
Key k;
if (e.hash == hash && ((k = e.key) == key || key.equalsIgnoreCase(k))) {
Object oldValue = e.value;
e.value = value;
e.recordAccess(this);
return oldValue;
}
}
modCount++;
addEntry(hash, key, value, i);
return null;
}
/**
* Associates the specified value with the specified key in this map. If the map previously
* contained a mapping for the key, the old value is replaced.
*
* @param key key with which the specified value is to be associated
* @param value value to be associated with the specified key
* @return the previous value associated with <tt>key</tt>, or <tt>null</tt> if there was no
* mapping for <tt>key</tt>. (A <tt>null</tt> return can also indicate that the map previously
* associated <tt>null</tt> with <tt>key</tt>.)
*/
public V put(K key, V value) {
if (key == null) return putForNullKey(value);
int hash = hash(key);
int i = indexFor(hash, table.length);
for (Entry<K, V> e = table[i]; e != null; e = e.next) {
Object k;
if (e.hash == hash && ((k = e.key) == key || key.equals(k))) {
V oldValue = e.value;
e.value = value;
e.recordAccess(this);
return oldValue;
}
}
modCount++;
addEntry(hash, key, value, i);
return null;
}
/**
* Returns the value to which the specified key is mapped, or {@code null} if this map contains no
* mapping for the key.
*
* <p>More formally, if this map contains a mapping from a key {@code k} to a value {@code v} such
* that {@code (key==null ? k==null : key.equals(k))}, then this method returns {@code v};
* otherwise it returns {@code null}. (There can be at most one such mapping.)
*
* <p>A return value of {@code null} does not <i>necessarily</i> indicate that the map contains no
* mapping for the key; it's also possible that the map explicitly maps the key to {@code null}.
* The {@link #containsKey containsKey} operation may be used to distinguish these two cases.
*/
public V get(Object key) {
Entry<K, V> e = (Entry<K, V>) getEntry(key);
if (e == null) return null;
e.recordAccess(this);
return e.value;
}