/** * {@inheritDoc} * * @return the previous value associated with the specified key, * or <tt>null</tt> if there was no mapping for the key * @throws NullPointerException if the specified key or value is null */ public V putIfAbsent(K key, V value) { if (value == null) { throw new NullPointerException(); } int hash = hashOf(key); return segmentFor(hash).put(key, hash, value, null, true); }
/** * {@inheritDoc} * * @return the previous value associated with the specified key, * or <tt>null</tt> if there was no mapping for the key * @throws NullPointerException if the specified key or value is null */ public V putIfAbsent(K key, V value) { if (value == null) { throw new NullPointerException(); } int hash = hashOf(key); return segmentFor(hash).put(key, hash, value, null, true); }
/** * Maps the specified key to the specified value in this table. * Neither the key nor the value can be null. * <p> * <p> The value can be retrieved by calling the <tt>get</tt> method * with a key that is equal to the original key. * * @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> * @throws NullPointerException if the specified key or value is null */ public V put(K key, V value) { if (value == null) { throw new NullPointerException(); } int hash = hashOf(key); return segmentFor(hash).put(key, hash, value, null, false); }
Segment<K, V> segment = segmentFor(hash); V v = segment.get(key, hash); return v == null ? segment.put(key, hash, null, mappingFunction, true) : v;
Segment<K, V> segment = segmentFor(hash); V v = segment.get(key, hash); return v == null ? segment.put(key, hash, null, mappingFunction, true) : v;
/** * Maps the specified key to the specified value in this table. * Neither the key nor the value can be null. * <p> * <p> The value can be retrieved by calling the <tt>get</tt> method * with a key that is equal to the original key. * * @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> * @throws NullPointerException if the specified key or value is null */ public V put(K key, V value) { if (value == null) { throw new NullPointerException(); } int hash = hashOf(key); return segmentFor(hash).put(key, hash, value, null, false); }