Method remove

src/main/java/gate/util/RBTreeMap.java:500–509

Removes the mapping for this key from this RBTreeMap if present. @return previous value associated with specified key, or null if there was no mapping for key. A null return can also indicate that the map previously associated null with the specified

(Object key)

    *		  <tt>null</tt> keys.
    */
  @Override
  public V remove(Object key) {
    Entry<K,V> p = getEntry(key);
    if (p == null)
        return null;

    V oldValue = p.value;
    deleteEntry(p);
    return oldValue;
  }

  /**
    * Removes all mappings from this RBTreeMap.