Returns the value associated with key. Implementation detail: Notice the map is shared between all instances.

@param <T>
@param key
@return
198063
public <T> T contextGet(Class<T> key)
	{
		synchronized (TypeCheckInfo.class)
		{
			Stack<T> contextStack = lookupListForType(key);
			if (contextStack != null)
			{
				return contextStack.peek();
			}

		}
		return null;
	}
534771
public Object get(long key)
  {
    int hash = (int) (key & mask);

    while (true) {
      long mapKey = keys[hash];

      if (mapKey == key)
        return values[hash];
      else if (mapKey == DEAD_KEY) {
        if ((flags[hash] & DELETED) == 0)
          return null;
      }

      hash = (hash + 1) & mask;
    }
  }
562658
List<V> get( K key ) {
        List<V> result = map.get( key );
        if( parent != null ) {
            List<V> resultParent = parent.get( key );
            if( result == null ) {
                return resultParent;
            } else if( resultParent == null ){
                return result;
            } else {
                for( V value : resultParent ) {
                    if( !result.contains( value ) ) {
                        result.add( value );
                    }
                }
            }
        }
        return result;
    }
1272910
public String getValue(String key) {
        KeyValue kv = getKV(key);
        return kv == null ? null : kv.getValue();
    }
96053
public final int get(String key)
  {

    for (int i = 0; i < m_firstFree; i++)
    {
      if (m_map[i].equals(key))
        return m_values[i];
    }

    return INVALID_KEY;
  }
908897
public V get(String key)
    {
        int index = exactMatchSearch(key);
        if (index >= 0)
        {
            return getValueAt(index);
        }

        return null;
    }
778945
public Map getMapOfValue(Object key) {
		for (Scope cur=this; cur!=null; cur=cur.parent) {
			if (cur.data != null && cur.data.containsKey(key)) {
				return cur.data;
			}
		}
		return null;
	}
49481
public V get( final K key ) {
        synchronized ( _map ) {
            final ManagedItem<V> item = _map.get( key );
            if ( item == null ) {
                return null;
            }
            if ( _ttl > -1 && System.currentTimeMillis() - item._insertionTime > _ttl ) {
                _map.remove( key );
                return null;
            }
            return item._value;
        }
    }
1175450
@Override
    @SuppressWarnings("unchecked")
    public V get(Object key) {
        final Element element = this.cache.get((Serializable) key);
        if (element == null) {
            return null;
        }

        return (V) element.getObjectValue();
    }
1033216
public V get(final int key) {
		final int index = (key & 0x7FFFFFFF) % elementData.length;

		IntLinkedEntry<V> m = elementData[index];
		while (m != null) {
			if (key == m.key) {
				if (accessOrder) {
					// if (log.isDebugEnabled()) log.debug("reliking " + this.key);
					m.remove();
					m.addBefore(header);
				}
				return m.value;
			}
			m = m.nextInSlot;
		}
		return null;
	}
748215
public Object get(String key) {
    if (!StringUtil.isEmpty(key)) {
      if (pendingInstanceData.containsKey(key)) {
        return pendingInstanceData.get(key);
      }
      if (instanceData.containsKey(key)) {
        return instanceData.get(key);
      }
    }
    return null;
  }
427738
public V retrieve(K key) {
        Ref<V> ref = map.get(key);
        return ref == null ? null : ref.get();
    }
1085516
public String getValueForDisplayValue(final String key) {
        if (mapDisplayValuesToValues.containsKey(key)) {
            return mapDisplayValuesToValues.get(key);
        }
        return key;
    }
1122649
public T get(String key) {
        SoftReference<T> ref = cacheMap.get(key);
        if (ref != null) {
            if (ref.get() == null) {
                logger.debug("Cached item was cleared: " + key);
            }
            return ref.get(); //maybe still be null
        }

        return null;
    }
184388
@Override
  public V get(Object key)
  {
    if (key == null)
      return _nullValue;

    int hash = key.hashCode() & _mask;
    int count = _size + 1;

    K []keys = _keys;

    for (; count > 0; count--) {
      K mapKey = keys[hash];

      if (mapKey == null)
        return null;

      if (key.equals(_keys[hash]))
        return _values[hash];

      hash = (hash + 1) & _mask;
    }

    return null;
  }
737746
public Data get(Key key) {
		synchronized (cache) {
			Pair<Data,Long> p = cache.get(key);
			if (p != null) {
				p.setValue2(Long.valueOf(System.currentTimeMillis()));
				return p.getValue1();
			}
			p = new Pair<>(provider.provide(key), Long.valueOf(System.currentTimeMillis()));
			cache.put(key, p);
			return p.getValue1();
		}
	}
729126
public String get(String key) {
        Objects.requireNonNull(key, Required.KEY.toString());

        return this.values.get(key);
    }